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Lin HF, Cheng ST, Chen DZ, Wu NY, Jiang ZX, Chang CT. Stabilizing Li-Rich Layered Cathode Materials Using a LiCoMnO 4 Spinel Nanolayer for Li-Ion Batteries. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3425. [PMID: 36234553 PMCID: PMC9565875 DOI: 10.3390/nano12193425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/23/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
Lithium-rich cathodes have excess lithium in the transition metal layer and exhibit an extremely high specific capacity and good energy density. However, they still have some disadvantages. Here, we propose LiCoMnO4, a new nanolayer coating material with a spinel structure, to modify the surface of lithium cathode oxide (Li7/6Mn1/2Ni1/6Co1/6O2) with a layered structure. The designed cathode with nanolayer spinel coating delivers an excellent reversible capacity, outstanding rate capability, and superior cycling ability whilst exhibiting discharge capacities of 300, 275, 220, and 166 mAh g-1 at rates of 0.1 C at 2.0-4.8 V formation and 0.1, 1, and 5 C, respectively, between 2.0 and 4.6 V. The cycling ability and voltage fading at a high operational voltage of 4.9 V were also investigated, with results showing that the nanolayer spinel coating can depress the surface of the lithium cathode oxide layer, leading to phase transformation that enhances the electrochemical performance.
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Ye H, Cao K, Wu X, Zou T, Chai L, Zhao Y, Hu Z, Wang L. A current collect-free Li 1.2Ni 0.13Co 0.13Mn 0.54O 2flexible film for high-performance lithium-ion batteries. NANOTECHNOLOGY 2021; 33:045703. [PMID: 34654004 DOI: 10.1088/1361-6528/ac302a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 10/15/2021] [Indexed: 06/13/2023]
Abstract
Due to the high demand for more convenient flexible devices, there are more requirements for higher performance of flexible batteries. The layered lithium-rich manganese-based Li1.2Ni0.13Co0.13Mn0.54O2cathode material has the advantages of higher energy density, higher discharge capacity and environmentally friendly, so it can be used for high-performance flexible electrode cathode material. Its theoretical capacity can reach more than 250 mAh g-1, which is higher than most cathode materials currently used in commercialization. Here we synthesize Li1.2Ni0.13Co0.13Mn0.54O2(LNCM) cathode, and then use a simple method to make a current collect-free LNCM flexible film. This film has excellent flexibility and electrochemical performance. At 25 mA g-1, its initial discharge capacity reaches 314.0 mAh g-1. After 200 cycles of 500 mA g-1, its capacity retention rate is 82.1%, the attenuation is about 0.08% per cycle. Moreover, by bending at any position of the flexible film, it can still remain intact, and the soft-packaged battery made by the flexible film can still be used under the bending condition and keep the brightness of the LED lamp unchanged. This shows that using Li1.2Ni0.13Co0.13Mn0.54O2to make high-performance flexible electrodes is a simple and effective method, which is expected to be practically applied to flexible electronic devices.
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Affiliation(s)
- Huizi Ye
- Department of Physics, Nanchang University, Nanchang 330031, People's Republic of China
| | - Kai Cao
- Department of Physics, Nanchang University, Nanchang 330031, People's Republic of China
| | - Xiaoqin Wu
- Department of Physics, Nanchang University, Nanchang 330031, People's Republic of China
| | - Tong Zou
- Department of Physics, Nanchang University, Nanchang 330031, People's Republic of China
| | - Lili Chai
- Department of Physics, Nanchang University, Nanchang 330031, People's Republic of China
| | - Yong Zhao
- Department of Physics, Nanchang University, Nanchang 330031, People's Republic of China
| | - Zhengguang Hu
- Department of Physics, Nanchang University, Nanchang 330031, People's Republic of China
| | - Li Wang
- Department of Physics, Nanchang University, Nanchang 330031, People's Republic of China
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3
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Zhao X, Yang H, Wang Y, Yang L, Zhu L. Lithium extraction from brine by an asymmetric hybrid capacitor composed of heterostructured lithium-rich cathode and nano-bismuth anode. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119078] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Ji X, Xu Y, Feng H, Wang P, Zhou Y, Song J, Xia Q, Tan Q. Surface LiMn 1.4Ni 0.5Mo 0.1O 4 Coating and Bulk Mo Doping of Li-Rich Mn-Based Li 1.2Mn 0.54Ni 0.13Co 0.13O 2 Cathode with Enhanced Electrochemical Performance for Lithium-Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2021; 13:47659-47670. [PMID: 34592096 DOI: 10.1021/acsami.1c14682] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
To improve the initial Coulombic efficiency, cycling stability, and rate performance of the Li-rich Mn-based Li1.2Mn0.54Ni0.13Co0.13O2 cathode, the combination of LiMn1.4Ni0.5Mo0.1O4 coating with Mo doping has been successfully carried out by the sol-gel method and subsequent dip-dry process. This strategy buffers the electrodes from the corrosion of electrolyte and enhances the lattice parameter, which could inhibit the oxygen release and maintain the structural stability, thus improving the cycle stability and rate capability. After LiMn1.4Ni0.5Mo0.1O4 modification, the initial discharge capacity reaches 272.4 mAh g-1 with a corresponding initial Coulombic efficiency (ICE) of 84.2% at 0.1C (1C = 250 mAh g-1), far higher than those (221.5 mAh g-1 and 68.9%) of the pristine sample. Besides, the capacity retention of the coated sample is enhanced by up to 66.8% after 200 cycles at 0.1C. Especially, the rate capability of the coated sample is 95.2 mAh g-1 at 5C. XRD, SEM, TEM, XPS, and Raman spectroscopy are adopted to characterize the morphologies and structures of the samples. This coating strategy has been demonstrated to be an effective approach to construct high-performance energy storage devices.
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Affiliation(s)
- Xueqian Ji
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuxing Xu
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Hebei Technology Innovation Center of Advanced Energy Materials, Langfang 065001, China
| | - Hailan Feng
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Hebei Technology Innovation Center of Advanced Energy Materials, Langfang 065001, China
| | - Pengfei Wang
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Hebei Technology Innovation Center of Advanced Energy Materials, Langfang 065001, China
| | - Yuncheng Zhou
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiechen Song
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qing Xia
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Hebei Technology Innovation Center of Advanced Energy Materials, Langfang 065001, China
- Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China
| | - Qiangqiang Tan
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Hebei Technology Innovation Center of Advanced Energy Materials, Langfang 065001, China
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Chae BG, Park SY, Song JH, Lee E, Jeon WS. Evolution and expansion of Li concentration gradient during charge-discharge cycling. Nat Commun 2021; 12:3814. [PMID: 34155217 PMCID: PMC8217543 DOI: 10.1038/s41467-021-24120-w] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 06/03/2021] [Indexed: 02/05/2023] Open
Abstract
To improve the performance of Li-ion batteries (LIBs), it is essential to understand the behaviour of Li ions during charge-discharge cycling. However, the analytical techniques for observing the Li ions are limited. Here, we present the complementary use of scanning transmission electron microscopy and atom probe tomography at identical locations to demonstrate that the evolution of the local Li composition and the corresponding structural changes at the atomic scale cause the capacity degradation of Li(Ni0.80Co0.15Mn0.05)O2 (NCM), an LIB cathode. Using these two techniques, we show that a Li concentration gradient evolves during cycling, and the depth of the gradient expands proportionally with the number of cycles. We further suggest that the capacity to accommodate Li ions is determined by the degree of structural disordering. Our findings provide direct evidence of the behaviour of Li ions during cycling and thus the origin of the capacity decay in LIBs.
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Affiliation(s)
- Byeong-Gyu Chae
- grid.419666.a0000 0001 1945 5898Analytical Engineering Group, Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Suwon, Republic of Korea
| | - Seong Yong Park
- grid.419666.a0000 0001 1945 5898Analytical Engineering Group, Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Suwon, Republic of Korea
| | - Jay Hyok Song
- grid.419666.a0000 0001 1945 5898Materials Development Group 1, Samsung SDI, Suwon, Republic of Korea
| | - Eunha Lee
- grid.419666.a0000 0001 1945 5898Analytical Engineering Group, Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Suwon, Republic of Korea
| | - Woo Sung Jeon
- grid.419666.a0000 0001 1945 5898Analytical Engineering Group, Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd., Suwon, Republic of Korea
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6
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Pechen LS, Makhonina EV, Medvedeva AE, Rumyantsev AM, Koshtyal YM, Politov YA, Goloveshkin AS, Eremenko IL. Effect of Dopants on the Functional Properties of Lithium-Rich Cathode Materials for Lithium-Ion Batteries. RUSS J INORG CHEM+ 2021. [DOI: 10.1134/s0036023621050144] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Bai M, Hu L, Liang Y, Hong B, Lai Y. Enhanced Electrochemical Properties of Lithium‐Rich Cathode Materials by Magnesium Borate Surface Coating. ChemistrySelect 2021. [DOI: 10.1002/slct.202004829] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Maohui Bai
- Powder Metallurgy Research Institute State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 PR China
- School of Metallurgy and Environment Central South University Changsha 410083 PR China
| | - Lina Hu
- Bangor College Central South University of Forestry and Technology Changsha 410083 PR China
| | - Yuhao Liang
- School of Metallurgy and Environment Central South University Changsha 410083 PR China
| | - Bo Hong
- School of Metallurgy and Environment Central South University Changsha 410083 PR China
| | - Yanqing Lai
- School of Metallurgy and Environment Central South University Changsha 410083 PR China
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8
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Song C, Feng W, Wang X, Shi Z. Improved storage capability and cycle stability in a Li-riched cathode by substituted Al. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.113962] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Wang Y, Wang L, Guo X, Wu T, Yang Y, Wang B, Wang E, Yu H. Thermal Stability Enhancement through Structure Modification on the Microsized Crystalline Grain Surface of Lithium-Rich Layered Oxides. ACS APPLIED MATERIALS & INTERFACES 2020; 12:8306-8315. [PMID: 31971359 DOI: 10.1021/acsami.9b21303] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Lithium-rich layered oxides have been considered as the most promising candidate for offering a high specific capacity and energy density for lithium-ion batteries. However, their practical applications are still suffered by the cycle instability and also closely related thermal stability. Here, microsized crystalline grains with good dispersion of lithium-rich layered oxides are prepared by a molten-salt method, while a spinel structure is also introduced on a grain surface by following chemical oxidation and annealing process, and their thermal performance with different cutoff voltages during the charge process is systematically studied using differential scanning calorimetry method. Results have shown that thermal stability of microsized crystalline grains is better than that of spherical secondary agglomerates, the spinel structure introduction on the grain surface of microsized crystalline grains can contribute obviously to their thermal stability, in which the onset temperature of the exothermic peak has been increased by 103 °C, and the thermal release value can be reduced as much as about 40% when the battery was charged to 4.8 V. Furthermore, the electrochemical performance, especially cycle stability under a high temperature, has also been enhanced for spinel-modified microsized crystalline grains. This work not only develops the microsized crystalline grains with good dispersion of lithium-rich layered oxides, confirming the advantages of these materials compared to spherical secondary agglomerates, but also reveals the method to improve their thermal stability by grain surface structure modification, opening the way to optimize the comprehensive performance of electrode materials for batteries.
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Affiliation(s)
- Yinzhong Wang
- College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China , Beijing University of Technology , Beijing 100124 , P.R. China
| | - Lin Wang
- College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China , Beijing University of Technology , Beijing 100124 , P.R. China
| | - Xianwei Guo
- College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China , Beijing University of Technology , Beijing 100124 , P.R. China
| | - Tianhao Wu
- College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China , Beijing University of Technology , Beijing 100124 , P.R. China
| | - Yubo Yang
- College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China , Beijing University of Technology , Beijing 100124 , P.R. China
| | - Boya Wang
- College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China , Beijing University of Technology , Beijing 100124 , P.R. China
| | - Errui Wang
- College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China , Beijing University of Technology , Beijing 100124 , P.R. China
| | - Haijun Yu
- College of Materials Science and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China , Beijing University of Technology , Beijing 100124 , P.R. China
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10
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Wang D, Xu T, Li Y, Pan D, Lu X, Hu YS, Dai S, Bai Y. Integrated Surface Functionalization of Li-Rich Cathode Materials for Li-Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2018; 10:41802-41813. [PMID: 30403129 DOI: 10.1021/acsami.8b16319] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
As candidates for high-energy density cathodes, lithium-rich (Li-rich) layered materials have attracted wide interest for next-generation Li-ion batteries. In this work, surface functionalization of a typical Li-rich material Li1.2Mn0.56Ni0.17Co0.07O2 is optimized by fluorine (F)-doped Li2SnO3 coating layer and electrochemical performances are also enhanced accordingly. The results demonstrate that F-doped Li2SnO3-modified material exhibits the highest capacity retention (73% after 200 cycles), with approximately 1.2, 1.4, and 1.5 times of discharge capacity for Li2SnO3 surface-modified, F-doped, and pristine electrodes, respectively. To reveal the fundamental enhancement mechanism, intensive surface Li+ diffusion kinetics, postmortem structural characteristics, and aging tests are performed for four sample systems. The results show that the integrated coating layer plays an important role in addressing interface compatibility, not only limited in stabilizing the bulk structure and suppressing side reactions, synergistically contributing to the performance enhancement for the active electrodes. These findings not only pave the way to commercial application of the Li-rich material but also shed new light on surface modification in batteries and other energy storage fields.
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Affiliation(s)
- Dandan Wang
- Key Laboratory of Photovoltaic Materials of Henan Province and School of Physics & Electronics , Henan University , Kaifeng 475004 , P. R. China
| | - Tinghua Xu
- Key Laboratory of Photovoltaic Materials of Henan Province and School of Physics & Electronics , Henan University , Kaifeng 475004 , P. R. China
| | - Yaping Li
- Key Laboratory of Photovoltaic Materials of Henan Province and School of Physics & Electronics , Henan University , Kaifeng 475004 , P. R. China
| | - Du Pan
- Key Laboratory of Photovoltaic Materials of Henan Province and School of Physics & Electronics , Henan University , Kaifeng 475004 , P. R. China
| | - Xia Lu
- School of Materials , Sun Yat-sen University , Guangzhou 510275 , P. R. China
| | - Yong-Sheng Hu
- Institute of Physics , Chinese Academy of Sciences , Beijing 100190 , P. R. China
| | - Sheng Dai
- Chemical Sciences Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | - Ying Bai
- Key Laboratory of Photovoltaic Materials of Henan Province and School of Physics & Electronics , Henan University , Kaifeng 475004 , P. R. China
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11
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Zhou S, Mei T, Wang X, Qian Y. Crystal structural design of exposed planes: express channels, high-rate capability cathodes for lithium-ion batteries. NANOSCALE 2018; 10:17435-17455. [PMID: 30207360 DOI: 10.1039/c8nr04842h] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Developing high-performance lithium ion batteries (LIBs) requires optimization of every battery component. Currently, the main problems lie in the mismatch of electrode capacities, especially the excessively low capacity of cathodes compared with that of anodes. Due to the anisotropy of the crystal structure, different crystal planes play different roles in the transmission of lithium ions. Among these, the {010} facets of layered-structure materials, the (110) planes of spinel cathodes and the (010) planes of olivine cathodes can provide open surface structures, which furnish express channels for the rapid and efficient transmission of lithium ions, leading to enhanced rate performance. However, due to the high-energy surfaces of these crystal planes, they tend to disappear in the synthetic process, forming thermodynamic equilibrium products dominated by low-energy and electrochemically-inactive planes. From the structure design of the material itself, preparing functional materials with specific morphologies and crystal structures is considered to be the most effective way to improve the cyclability and rate performance of LIB cathodes. In this review, we highlight the latest developments in selectively exposing the crystal planes of LIB cathode materials. The synthetic method, the corresponding electrochemical performance, especially the rate capability, and the growth mechanism have been systematically summarized for layered-structure cathodes of LiCoO2, LiNixCoyMn1-x-yO2 and Li2MnO3·LiMO2, spinel cathodes of LiMn2O4 and LiNi0.5Mn1.5O4, and olivine cathodes of LiFePO4. This in-depth discussion and understanding is beneficial for the rational design of well-performing LIB cathodes and can provide direction and perspectives for future work.
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Affiliation(s)
- Shiyuan Zhou
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, PR China.
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12
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Wang L, Shi JL, Su H, Li G, Zubair M, Guo YG, Yu H. Composite-Structure Material Design for High-Energy Lithium Storage. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1800887. [PMID: 29969184 DOI: 10.1002/smll.201800887] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 04/27/2018] [Indexed: 05/13/2023]
Abstract
High-energy storage devices are in demand for the rapid development of modern society. Until now, many kinds of energy storage devices, such as lithium-ion batteries (LIBs), sodium-ion batteries (NIBs), and so on, have been developed in the past 30 years. However, most of the commercially exploited and studied active electrode materials of these energy storage devices possess a single phase with low reversible capacity or unsatisfied cycle stability. Continuous and extensive research efforts are made to develop alternative materials with a higher specific energy density and long cycle life by element doping or surface modification. A novel strategy of forming composite-structure electrode materials by introducing structure units has attracted great attention in recent years. Herein, based on previous publications on these composite-structure materials, some important scientific points focusing on the design of composite-structure materials for better electrochemical performances reveal the distinction of composite structures based on average and local structure analysis methods, and an understanding of the relationship between these interior composite structures and their electrochemical performances is discussed thoroughly. The lithiation/delithiation mechanism and the remaining challenges and perspectives for composite-structure electrode materials are also elaborated.
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Affiliation(s)
- Lin Wang
- College of Materials Sciences and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing, 100124, P. R. China
| | - Ji-Lei Shi
- Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
| | - Heng Su
- College of Materials Sciences and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing, 100124, P. R. China
| | - Guangyin Li
- College of Materials Sciences and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing, 100124, P. R. China
| | - Muhammad Zubair
- College of Materials Sciences and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing, 100124, P. R. China
| | - Yu-Guo Guo
- Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Haijun Yu
- College of Materials Sciences and Engineering, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Beijing University of Technology, Beijing, 100124, P. R. China
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13
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Li Q, Dang R, Chen M, Lee Y, Hu Z, Xiao X. Synthesis Method for Long Cycle Life Lithium-Ion Cathode Material: Nickel-Rich Core-Shell LiNi 0.8Co 0.1Mn 0.1O 2. ACS APPLIED MATERIALS & INTERFACES 2018; 10:17850-17860. [PMID: 29733197 DOI: 10.1021/acsami.8b02000] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
High-nickel materials with core-shell structures, whose bulk is rich in nickel content and the outer shell is rich in manganese content, have been demonstrated to improve cycle stability. The high-nickel cathode material LiNi0.8Co0.1Mn0.1O2 is a very promising material for lithium-ion batteries; however, its low rate performance and especially cycle performance currently hamper further commercialization. This study presents a new synthesis method to prepare this core-shell material (LiNi0.8Co0.1Mn0.1O2@ x[Li-Mn-O], x = 0.01, 0.03, 0.06). Electrochemical data show that LiNi0.8Co0.1Mn0.1O2@ x[Li-Mn-O] ( x = 0.03, CS-0.03) exhibits the best high-rate performance, cycle stability, and thermal stability. The initial discharge capacity of the core-shell sample CS-0.03 is 118 mAh g-1, which is almost the same as the discharge capacity of pristine LiNi0.8Mn0.1Co0.1O2 (117 mAh g-1) at the rate of 10 C in the voltage range of 3.0-4.3 V. Notably the capacity decay of CS-0.03 is 18.4% after 200 cycles compared to 27% decay in capacity of the pristine sample. Furthermore, CS-0.03 exhibits better thermal cycling stability. The capacity retention of the CS-0.03 sample reached 65.1% which is over 1.3 times than that of the pristine one, whose capacity retention is 49.2% after 105 cycles (55 °C). Evidently, the core-shell structured CS-0.03 sample has excellent cycle stability and this synthesis method can be applied to other cathode materials.
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Affiliation(s)
- Qi Li
- College of Materials Science and Optoelectronic Technology , University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Rongbin Dang
- College of Materials Science and Optoelectronic Technology , University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Minmin Chen
- College of Materials Science and Optoelectronic Technology , University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Yulin Lee
- Department of Materials, Royal School of Mines , Imperial College London , Exhibition Road , London SW7 2AZ , United Kingdom
| | - Zhongbo Hu
- College of Materials Science and Optoelectronic Technology , University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Xiaoling Xiao
- College of Materials Science and Optoelectronic Technology , University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
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14
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Enhanced electrochemical performance of Li1.2Ni0.2Mn0.6O2 cathode materials through facile layered/spinel phase tuning. J Solid State Electrochem 2018. [DOI: 10.1007/s10008-018-3953-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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15
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Li X, Li D, Song D, Shi X, Tang X, Zhang H, Zhang L. Unravelling the Structure and Electrochemical Performance of Li-Cr-Mn-O Cathodes: From Spinel to Layered. ACS APPLIED MATERIALS & INTERFACES 2018; 10:8827-8835. [PMID: 29470046 DOI: 10.1021/acsami.7b18097] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
To explore a new series of cathode materials with high electrochemical performance, the spinel-layered (1 - x)[LiCrMnO4]· x[Li2MnO3·LiCrO2] ( x = 0, 0.25, 0.5, 0.75, and 1) composites are synthesized with the sol-gel method. X-ray diffraction, high-resolution transmission electron microscopy, selected area electron diffraction, and Raman spectra reveal that the structure of the (1 - x)[LiCrMnO4]· x[Li2MnO3·LiCrO2] cathode materials evolves from spinel to hybrid spinel-layered and layered structures with the increase of the Li concentration. Test results reveal that the structure and electrochemical performance of (1 - x)[LiCrMnO4]· x[Li2MnO3·LiCrO2] ( x = 0.25, 0.5 and 0.75) composites have the characteristics of both spinel ( x = 0) and Li-rich layered phases ( x = 1). In particular, x = 0.5 and 0.75 electrodes exhibit relatively high capacity retention and rate capability, which is mainly ascribed to the synergistic effect of the spinel and Li-rich layered phases, the 3D Li-ion diffusion channels of the spinel phase, and the low charge-transfer resistance ( Rct) and Warburg diffusion impedance ( Wo).
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Affiliation(s)
- Xuelei Li
- Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering , Tianjin University of Technology , Tianjin 300384 , China
| | - Dan Li
- Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering , Tianjin University of Technology , Tianjin 300384 , China
| | - Dawei Song
- Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering , Tianjin University of Technology , Tianjin 300384 , China
| | - Xixi Shi
- Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering , Tianjin University of Technology , Tianjin 300384 , China
| | - Xu Tang
- Electron Microscopy Laboratory, Institute of Geology and Geophysics , Chinese Academy of Sciences , Beijing 100029 , China
| | - Hongzhou Zhang
- Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering , Tianjin University of Technology , Tianjin 300384 , China
| | - Lianqi Zhang
- Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering , Tianjin University of Technology , Tianjin 300384 , China
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16
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Zhang J, Gao R, Sun L, Li Z, Zhang H, Hu Z, Liu X. Understanding the effect of an in situ generated and integrated spinel phase on a layered Li-rich cathode material using a non-stoichiometric strategy. Phys Chem Chem Phys 2018; 18:25711-25720. [PMID: 27711565 DOI: 10.1039/c6cp03683j] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Recently, spinel-layered integrated Li-rich cathode materials have attracted great interest due to the large enhancement of their electrochemical performances. However, the modification mechanism and the effect of the integrated spinel phase on Li-rich layered cathode materials are still not very clear. Herein, we have successfully synthesized the spinel-layered integrated Li-rich cathode material using a facile non-stoichiometric strategy (NS-LNCMO). The rate capability (84 mA h g-1vs. 28 mA h g-1, 10 C), cycling stability (92.4% vs. 80.5%, 0.2 C), low temperature electrochemical capability (96.5 mA h g-1vs. 59 mA h g-1, -20 °C), initial coulomb efficiency (92% vs. 79%) and voltage fading (2.77 V vs. 3.02 V, 200 cycles@1 C) of spinel-layered integrated Li-rich cathode materials have been significantly improved compared with a pure Li-rich phase cathode. Some new insights into the effect of the integrated spinel phase on a layered Li-rich cathode have been proposed through a comparison of the structure evolution of the integrated and Li-rich only materials before and after cycling. The Li-ion diffusion coefficient of NS-LNCMO has been enlarged by about 3 times and almost does not change even after 100 cycles indicating an enhanced structure stability. The integration of the spinel phase not only enhances the structure stability of the layered Li-rich phase during charging-discharging but also expands the interslab spacing of the Li-ion diffusion layer, and elongates TM-O covalent bond lengths, which lowers the activation barrier of Li+-transportation, and alleviates the structure strain during the cycling procedure.
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Affiliation(s)
- Jicheng Zhang
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
| | - Rui Gao
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
| | - Limei Sun
- Department of Nuclear Physics, China Institute of Atomic Energy, Beijing 102413, China
| | - Zhengyao Li
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
| | - Heng Zhang
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
| | - Zhongbo Hu
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
| | - Xiangfeng Liu
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
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17
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Xiao Z, Meng J, Li Q, Wang X, Huang M, Liu Z, Han C, Mai L. Novel MOF shell-derived surface modification of Li-rich layered oxide cathode for enhanced lithium storage. Sci Bull (Beijing) 2018; 63:46-53. [PMID: 36658917 DOI: 10.1016/j.scib.2017.12.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Revised: 11/30/2017] [Accepted: 12/11/2017] [Indexed: 01/21/2023]
Abstract
Li-rich layered oxide materials have attracted increasing attention because of their high specific capacity (>250 mAh g-1). However, these materials typically suffer from poor cycling stability and low rate performance. Herein, we propose a facile and novel metal-organic-framework (MOF) shell-derived surface modification strategy to construct NiCo nanodots decorated (∼5 nm in diameter) carbon-confined Li1.2Mn0.54Ni0.13Co0.13O2 nanoparticles (LLO@C&NiCo). The MOF shell is firstly formed on the surface of as-prepared Li1.2Mn0.54Ni0.13Co0.13O2 nanoparticles via low-pressure vapor superassembly and then is in situ converted to the NiCo nanodots decorated carbon shell after subsequent controlled pyrolysis. The obtained LLO@C&NiCo cathode exhibits enhanced cycling and rate capability with a capacity retention of 95% after 100 cycles at 0.4 C and a high capacity of 159 mAh g-1 at 5 C, respectively, compared with those of LLO (75% and 105 mAh g-1). The electrochemical impedance spectroscopy and selected area electron diffraction analyses after cycling demonstrate that the thin C&NiCo shell can endow LLO with high electronic conductivity and structural stability, indicating the undesired formation of the spinel phase initiated from the particle surface is efficiently suppressed. Therefore, this presented strategy may open a new avenue on the design of high-performance electrode materials for energy storage.
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Affiliation(s)
- Zhitong Xiao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Jiashen Meng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Qi Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Xuanpeng Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Meng Huang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Ziang Liu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Chunhua Han
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China.
| | - Liqiang Mai
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China; Department of Chemistry, University of California, Berkeley, CA 94720, USA.
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18
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Kumar Nayak P, Grinblat J, Levi E, Penki TR, Levi M, Sun YK, Markovsky B, Aurbach D. Remarkably Improved Electrochemical Performance of Li- and Mn-Rich Cathodes upon Substitution of Mn with Ni. ACS APPLIED MATERIALS & INTERFACES 2017; 9:4309-4319. [PMID: 27669499 DOI: 10.1021/acsami.6b07959] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Li- and Mn-rich transition-metal oxides of layered structure are promising cathodes for Li-ion batteries because of their high capacity values, ≥250 mAh g-1. These cathodes suffer from capacity fading and discharge voltage decay upon prolonged cycling to potential higher than 4.5 V. Most of these Li- and Mn-rich cathodes contain Ni in a 2+ oxidation state. The fine details of the composition of these materials may be critically important in determining their performance. In the present study, we used Li1.2Ni0.13Mn0.54Co0.13O2 as the reference cathode composition in which Mn ions are substituted by Ni ions so that their average oxidation state in Li1.2Ni0.27Mn0.4Co0.13O2 could change from 2+ to 3+. Upon substitution of Mn with Ni, the specific capacity decreases but, in turn, an impressive stability was gained, about 95% capacity retention after 150 cycles, compared to 77% capacity retention for Li1.2Ni0.13Mn0.54Co0.13O2 cathodes when cycled at a C/5 rate. Also, a higher average discharge voltage of 3.7 V is obtained for Li1.2Ni0.27Mn0.4Co0.13O2 cathodes, which decreases to 3.5 V after 150 cycles, while the voltage fading of cathodes comprising the reference material is more pronounced. The Li1.2Ni0.27Mn0.4Co0.13O2 cathodes also demonstrate higher rate capability compared to the reference Li1.2Ni0.13Mn0.54Co0.13O2 cathodes. These results clearly indicate the importance of the fine composition of cathode materials containing the five elements Li, Mn, Ni, Co, and O. The present study should encourage rigorous optimization efforts related to the fine composition of these cathode materials, before external means such as doping and coating are applied.
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Affiliation(s)
| | | | | | | | | | - Yang-Kook Sun
- Department of Energy Engineering, Hanyang University , Seoul 133-791, Republic of Korea
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19
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Li W, Song B, Manthiram A. High-voltage positive electrode materials for lithium-ion batteries. Chem Soc Rev 2017; 46:3006-3059. [DOI: 10.1039/c6cs00875e] [Citation(s) in RCA: 743] [Impact Index Per Article: 106.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The ever-growing demand for advanced rechargeable lithium-ion batteries in portable electronics and electric vehicles has spurred intensive research efforts on high-voltage positive electrode materials over the past decade.
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Affiliation(s)
- Wangda Li
- Materials Science and Engineering Program and Texas Materials Institute
- University of Texas at Austin
- Austin
- USA
| | - Bohang Song
- Materials Science and Engineering Program and Texas Materials Institute
- University of Texas at Austin
- Austin
- USA
| | - Arumugam Manthiram
- Materials Science and Engineering Program and Texas Materials Institute
- University of Texas at Austin
- Austin
- USA
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20
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Nayak PK, Levi E, Grinblat J, Levi M, Markovsky B, Munichandraiah N, Sun YK, Aurbach D. High-Capacity Layered-Spinel Cathodes for Li-Ion Batteries. CHEMSUSCHEM 2016; 9:2404-2413. [PMID: 27530465 DOI: 10.1002/cssc.201600576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 06/29/2016] [Indexed: 06/06/2023]
Abstract
Li and Mn-rich layered oxides with the general structure x Li2 MnO3 ⋅(1-x) LiMO2 (M=Ni, Mn, Co) are promising cathode materials for Li-ion batteries because of their high specific capacity, which may be greater than 250 mA h g(-1) . However, these materials suffer from high first-cycle irreversible capacity, gradual capacity fading, limited rate capability and discharge voltage decay upon cycling, which prevent their commercialization. The decrease in average discharge voltage is a major issue, which is ascribed to a structural layered-to-spinel transformation upon cycling of these oxide cathodes in wide potential ranges with an upper limit higher than 4.5 V and a lower limit below 3 V versus Li. By using four elements systems (Li, Mn, Ni, O) with appropriate stoichiometry, it is possible to prepare high capacity composite cathode materials that contain LiMn1.5 Ni0.5 O4 and Lix Mny Niz O2 components. The Li and Mn-rich layered-spinel cathode materials studied herein exhibit a high specific capacity (≥200 mA h g(-1) ) with good capacity retention upon cycling in a wide potential domain (2.4-4.9 V). The effect of constituent phases on their electrochemical performance, such as specific capacity, cycling stability, average discharge voltage, and rate capability, are explored here. This family of materials can provide high specific capacity, high rate capability, and promising cycle life. Using Co-free cathode materials is also an obvious advantage of these systems.
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Affiliation(s)
| | - Elena Levi
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Judith Grinblat
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Mikhael Levi
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - Boris Markovsky
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel
| | - N Munichandraiah
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore, 560012, India
| | - Yang Kook Sun
- Department of Energy Engineering, Hanyang University, 133-791, Republic of Korea
| | - Doron Aurbach
- Department of Chemistry, Bar-Ilan University, Ramat-Gan, 5290002, Israel.
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21
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Layered Cathode Material with Improved Cycle Performance and Capacity by Surface Anchoring of TiO 2 Nanoparticles for Li-ion Batteries. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.07.157] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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22
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Zhang J, Zhang H, Gao R, Li Z, Hu Z, Liu X. New insights into the modification mechanism of Li-rich Li1.2Mn0.6Ni0.2O2 coated by Li2ZrO3. Phys Chem Chem Phys 2016; 18:13322-31. [DOI: 10.1039/c6cp01366j] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synergetic modification mechanism in Li2ZrO3-coated Li-rich Li1.2Mn0.6Ni0.2O2via a synchronous lithiation strategy has been proposed.
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Affiliation(s)
- Jicheng Zhang
- College of Materials Science and Opto-Electronic Technology
- University of Chinese Academy of Sciences
- Beijing
- P. R. China
| | - Heng Zhang
- College of Materials Science and Opto-Electronic Technology
- University of Chinese Academy of Sciences
- Beijing
- P. R. China
| | - Rui Gao
- College of Materials Science and Opto-Electronic Technology
- University of Chinese Academy of Sciences
- Beijing
- P. R. China
| | - Zhengyao Li
- College of Materials Science and Opto-Electronic Technology
- University of Chinese Academy of Sciences
- Beijing
- P. R. China
| | - Zhongbo Hu
- College of Materials Science and Opto-Electronic Technology
- University of Chinese Academy of Sciences
- Beijing
- P. R. China
| | - Xiangfeng Liu
- College of Materials Science and Opto-Electronic Technology
- University of Chinese Academy of Sciences
- Beijing
- P. R. China
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23
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Chong J, Zhang J, Xie H, Song X, Liu G, Battaglia V, Xun S, Wang R. High performance LiNi0.5Mn1.5O4 cathode material with a bi-functional coating for lithium ion batteries. RSC Adv 2016. [DOI: 10.1039/c6ra00119j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
LiPO3/LiNi0.5Mn1.5O4 exhibited superior cyclability and rate performance as a result of a bi-functional coating layer of LiPO3.
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Affiliation(s)
- Jin Chong
- Institute of Functional Material Chemistry
- Faculty of Chemistry
- National & Local United Engineering Lab for Power Battery
- Northeast Normal University
- Changchun
| | - Jingping Zhang
- Institute of Functional Material Chemistry
- Faculty of Chemistry
- National & Local United Engineering Lab for Power Battery
- Northeast Normal University
- Changchun
| | - Haiming Xie
- Institute of Functional Material Chemistry
- Faculty of Chemistry
- National & Local United Engineering Lab for Power Battery
- Northeast Normal University
- Changchun
| | - Xiangyun Song
- Energy Storage and Distributed Resources Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | - Gao Liu
- Energy Storage and Distributed Resources Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | - Vincent Battaglia
- Energy Storage and Distributed Resources Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | - Shidi Xun
- Energy Storage and Distributed Resources Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
| | - Rongsun Wang
- Institute of Functional Material Chemistry
- Faculty of Chemistry
- National & Local United Engineering Lab for Power Battery
- Northeast Normal University
- Changchun
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24
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Zhang J, Lei Z, Wang J, NuLi Y, Yang J. Surface Modification of Li1.2Ni0.13Mn0.54Co0.13O2 by Hydrazine Vapor as Cathode Material for Lithium-Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2015; 7:15821-9. [PMID: 26079270 DOI: 10.1021/acsami.5b02937] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
An artificial interface is successfully prepared on the surface of the layered lithium-rich cathode material Li1.2Ni0.13Mn0.54Co0.12O2 via treating it with hydrazine vapor, followed by an annealing process. The inductively coupled plasma-atomic emission spectrometry (ICP) results indicate that lithium ions are leached out from the surface of Li1.2Ni0.13Mn0.54Co0.12O2 by the hydrazine vapor. A lithium-deficiency-driven transformation from layered to spinel at the particle surface happens in the annealing process, which is proved by the results of X-ray diffraction (XRD) and high-resolution transmission electron microscope (HRTEM). It is also found that the content of the spinel phase increases at higher annealing temperature, and an internal structural evolution from Li1-xM2O4-type spinel to M3O4-type spinel takes place simultaneously. Compared to the pristine Li1.2Ni0.13Mn0.54Co0.12O2, the surface-modified sample annealed at 300 °C delivers a larger initial discharge capacity of 295.6 mA h g(-1) with a Coulombic efficiency of 89.5% and a better rate performance (191.7 mA h g(-1) at 400 mA g(-1)).
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Affiliation(s)
- Jie Zhang
- Shanghai Electrochemical Energy Devices Research Center, Department of Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Zhihong Lei
- Shanghai Electrochemical Energy Devices Research Center, Department of Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Jiulin Wang
- Shanghai Electrochemical Energy Devices Research Center, Department of Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Yanna NuLi
- Shanghai Electrochemical Energy Devices Research Center, Department of Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Jun Yang
- Shanghai Electrochemical Energy Devices Research Center, Department of Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
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25
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Wang J, Yu Y, Li B, Fu T, Xie D, Cai J, Zhao J. Improving the electrochemical properties of LiNi0.5Co0.2Mn0.3O2 at 4.6 V cutoff potential by surface coating with Li2TiO3 for lithium-ion batteries. Phys Chem Chem Phys 2015; 17:32033-43. [DOI: 10.1039/c5cp05319f] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Li2TiO3-coated LiNi0.5Co0.2Mn0.3O2 (LTO@NCM) cathode materials are synthesized via an in situ coprecipitation method to improve the electrochemical performance of NCM.
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Affiliation(s)
- Jing Wang
- State Key Lab of Physical Chemistry of Solid Surfaces
- Department of Chemistry
- Collaborative Innovation Center of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Yangyang Yu
- State Key Lab of Physical Chemistry of Solid Surfaces
- Department of Chemistry
- Collaborative Innovation Center of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Bing Li
- School of Energy Research
- Xiamen University
- Xiamen
- P. R. China
| | - Tao Fu
- State Key Lab of Physical Chemistry of Solid Surfaces
- Department of Chemistry
- Collaborative Innovation Center of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Dongquan Xie
- State Key Lab of Physical Chemistry of Solid Surfaces
- Department of Chemistry
- Collaborative Innovation Center of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Jijun Cai
- State Key Lab of Physical Chemistry of Solid Surfaces
- Department of Chemistry
- Collaborative Innovation Center of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Jinbao Zhao
- State Key Lab of Physical Chemistry of Solid Surfaces
- Department of Chemistry
- Collaborative Innovation Center of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
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