1
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Shen L, Gu Y, Xu T, Zhou Q, Peng P, Chen Y, Du F, Zheng J. Dual modification of phosphate toward improving electrochemical performance of LiNiO 2 cathode materials. J Colloid Interface Sci 2024; 662:505-515. [PMID: 38364475 DOI: 10.1016/j.jcis.2024.01.181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 01/10/2024] [Accepted: 01/25/2024] [Indexed: 02/18/2024]
Abstract
Lithium nickel oxide (LiNiO2) cathode materials are featured with high capacity and low cost for rechargeable lithium-ion batteries but suffer from severe structure and interface instability. Bulk doping together with surface coating has been proven to be an efficient approach to improve the inner structure and interfacial stability of the LiNiO2 cathode material. Nevertheless, the role of anion doping seems to be quite different from that of cation doping, and a deep insight will be desirable for the structure design of the LiNiO2 cathode material. In this paper, PO43--doped and Li3PO4-coating of dual modification of LiNiO2 are achieved via a facile approach. It is demonstrated that the PO43- anions are doped into the tetrahedron vacant sites of the crystal structure, alleviating the phase transition and improving the reversibility of crystal structure. Besides, the Li3PO4 coating layer ameliorates the interface stability to restrain the side reactions. Therefore, the dual modification enhances overall structural stability of the material to provide excellent performance. Moreover, the consumption of the Li residues by the formation of Li3PO4 coating layer, and the enlarged interlayer spacing of the crystal structure by PO43- doping can facilitate the Li+ ions diffusion, resulting in a superior rate capability.
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Affiliation(s)
- Lina Shen
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Yuhan Gu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Tao Xu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Qun Zhou
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
| | - Pai Peng
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Yu Chen
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Fanghui Du
- Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China
| | - Junwei Zheng
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
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2
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Lei YJ, Zhao L, Lai WH, Huang Z, Sun B, Jaumaux P, Sun K, Wang YX, Wang G. Electrochemical coupling in subnanometer pores/channels for rechargeable batteries. Chem Soc Rev 2024; 53:3829-3895. [PMID: 38436202 DOI: 10.1039/d3cs01043k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
Subnanometer pores/channels (SNPCs) play crucial roles in regulating electrochemical redox reactions for rechargeable batteries. The delicately designed and tailored porous structure of SNPCs not only provides ample space for ion storage but also facilitates efficient ion diffusion within the electrodes in batteries, which can greatly improve the electrochemical performance. However, due to current technological limitations, it is challenging to synthesize and control the quality, storage, and transport of nanopores at the subnanometer scale, as well as to understand the relationship between SNPCs and performances. In this review, we systematically classify and summarize materials with SNPCs from a structural perspective, dividing them into one-dimensional (1D) SNPCs, two-dimensional (2D) SNPCs, and three-dimensional (3D) SNPCs. We also unveil the unique physicochemical properties of SNPCs and analyse electrochemical couplings in SNPCs for rechargeable batteries, including cathodes, anodes, electrolytes, and functional materials. Finally, we discuss the challenges that SNPCs may face in electrochemical reactions in batteries and propose future research directions.
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Affiliation(s)
- Yao-Jie Lei
- Centre for Clean Energy Technology, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW 2007, Australia.
| | - Lingfei Zhao
- Institute for Superconducting & Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, Innovation Campus, Squires Way, North Wollongong, NSW 2500, Australia
| | - Wei-Hong Lai
- Institute for Superconducting & Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, Innovation Campus, Squires Way, North Wollongong, NSW 2500, Australia
| | - Zefu Huang
- Centre for Clean Energy Technology, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW 2007, Australia.
| | - Bing Sun
- Centre for Clean Energy Technology, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW 2007, Australia.
| | - Pauline Jaumaux
- Centre for Clean Energy Technology, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW 2007, Australia.
| | - Kening Sun
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 10081, P. R. China.
| | - Yun-Xiao Wang
- Institute of Energy Materials Science (IEMS), University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093, P. R. China.
| | - Guoxiu Wang
- Centre for Clean Energy Technology, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, Sydney, NSW 2007, Australia.
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3
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Addressing cation mixing in layered structured cathodes for lithium-ion batteries: A critical review. NANO MATERIALS SCIENCE 2022. [DOI: 10.1016/j.nanoms.2022.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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4
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Qiao Z, Lin L, Yan X, Guo W, Chen Q, Xie Q, Han X, Lin J, Wang L, Peng DL. Function and Application of Defect Chemistry in High-Capacity Electrode Materials for Li-Based Batteries. Chem Asian J 2020; 15:3620-3636. [PMID: 32985136 DOI: 10.1002/asia.202000904] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 09/22/2020] [Indexed: 01/16/2023]
Abstract
Current commercial Li-based batteries are approaching their energy density limitation, yet still cannot satisfy the energy density demand of the high-end devices. Hence, it is critical to developing advanced electrode materials with high specific capacity. However, these electrode materials are facing challenges of severe structural degradation and fast capacity fading. Among various strategies, constructing defects in electrode materials holds great promise in addressing these issues. Herein, we summarize a series of significant defect engineering in the high-capacity electrode materials for Li-based batteries. The detailed retrospective on defects specification, function mechanism, and corresponding application achievements on these electrodes are discussed from the view of point, line, planar, volume defects. Defect engineering can not only stabilize the structure and enhance electric/ionic conductivity, but also act as active sites to improve the ionic storage and bonding ability of electrode materials to Li metal. We hope this review can spark more perspectives on evaluating high-energy-density Li-based batteries.
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Affiliation(s)
- Zhensong Qiao
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, P.R. China
| | - Liang Lin
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, P.R. China
| | - Xiaolin Yan
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, P.R. China
| | - Weibin Guo
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, P.R. China
| | - Qiulin Chen
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, P.R. China
| | - Qingshui Xie
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, P.R. China
| | - Xiao Han
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, P.R. China
| | - Jie Lin
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, P.R. China
| | - Laisen Wang
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, P.R. China
| | - Dong-Liang Peng
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Fujian Key Laboratory of Materials Genome, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, 361005, P.R. China
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5
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Song D, Sun X, Niu Q, Zhao Q, Wang C, Yang L, Wu Y, Li M, Ohsaka T, Matsumotoc F, Wu J. High-Efficiency Electrolyte for Li-Rich Cathode Materials Achieving Enhanced Cycle Stability and Suppressed Voltage Fading Capable of Practical Applications on a Li-Ion Battery. ACS APPLIED MATERIALS & INTERFACES 2020; 12:49666-49679. [PMID: 33079528 DOI: 10.1021/acsami.0c14995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Li-rich cathodes have been in considerable attention for their high reversible capacity. However, they have serious problems like poor cycling with intense capacity decay and voltage fading, which restrict their access to practical applications. In this work, a facile and efficient strategy is proposed to alleviate these intrinsic issues with a high-efficiency electrolyte system. This special electrolyte enables Li-rich cathodes to deliver superior integrated performance with a high initial discharge capacity of 301 mAh·g-1, outstanding cycling stability with a capacity retention of 88% at 0.5 C over 500 cycles, and a remarkable rate capability of 136 mAh·g-1 at 5 C, respectively. What is more, the voltage fading is largely suppressed. Physical and electrochemical characterizations demonstrate that the robust CEI film formed on the cathode surface contributes to the improved electrochemical performance. This work provides a new approach to surmount defects of Li-rich materials and will largely promote their practical applications on Li-ion batteries.
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Affiliation(s)
- Depeng Song
- Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No. 189 Songling Road, Qingdao 266101, China
| | - Xiaolin Sun
- Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No. 189 Songling Road, Qingdao 266101, China
| | - Quanhai Niu
- Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No. 189 Songling Road, Qingdao 266101, China
| | - Qing Zhao
- Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No. 189 Songling Road, Qingdao 266101, China
| | - Cheng Wang
- Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No. 189 Songling Road, Qingdao 266101, China
| | - Li Yang
- Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No. 189 Songling Road, Qingdao 266101, China
| | - Yue Wu
- Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No. 189 Songling Road, Qingdao 266101, China
| | - Minmin Li
- Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No. 189 Songling Road, Qingdao 266101, China
| | - Takeo Ohsaka
- Research Institute for Engineering, Kanagawa University, Kanagawa-Ku, Yokohama 221-8686, Japan
| | - Futoshi Matsumotoc
- Research Institute for Engineering, Kanagawa University, Kanagawa-Ku, Yokohama 221-8686, Japan
| | - Jianfei Wu
- Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, No. 189 Songling Road, Qingdao 266101, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, PR China
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6
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Hu K, Lv G, Zhang J, Guo X, Wu Z, Xiang W, Lan X, Zhou K, Xu P, Zhang L. Na 2S Treatment and Coherent Interface Modification of the Li-Rich Cathode to Address Capacity and Voltage Decay. ACS APPLIED MATERIALS & INTERFACES 2020; 12:42660-42668. [PMID: 32878431 DOI: 10.1021/acsami.0c08797] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Li-rich and Mn-based layered oxides are the most promising candidates for next-generation high energy density cathode materials. However, inherent problems including poor rate performance, continuous capacity degradation, and voltage fading hinder their commercial utilization. Herein, a lattice- and interfacial-modified Li1.2Mn0.54Co0.13Ni0.13O2 with a pristine-layered bulk structure, Na- and S-doped transition phase, and epitaxially grown Na2Mn (SO4)2 (C2/c symmetry) layer were constructed by Na2S treatment. The monoclinic Na2Mn(SO4)2 not only acts as an interface protective layer, alleviating the harmful electrode-electrolyte reactions, but also promotes formation of oxygen vacancy in the layered structure, enhancing reversibility of oxygen redox. The Na and S surface lattice doping leads to enhanced Li+ diffusion and alleviates the chance of oxygen release. With the positive effects provided by the stable interfacial layer and lattice modification, the modified cathodes with moderate Na2S treatment shows alleviated capacity and voltage decay and enhanced electrochemical kinetics. Especially, the washed cathode with 3 wt % Na2S treatment delivers a discharge specific capacity of 305 at 0.1 C and 219 mA h g-1 at 1 C, as well as 93.15% capacity retention and 88.20% voltage retention after 200 cycles at 1 C.
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Affiliation(s)
- Kanghui Hu
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, PR China
| | - Genpin Lv
- Shaoguan HEC Technology R&D Company Ltd., Ruyuan 512000, Guangdong, PR China
| | - Jun Zhang
- Shaoguan HEC Technology R&D Company Ltd., Ruyuan 512000, Guangdong, PR China
| | - Xiaodong Guo
- School of Chemical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Zhenguo Wu
- School of Chemical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Wei Xiang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, PR China
- Shaoguan HEC Technology R&D Company Ltd., Ruyuan 512000, Guangdong, PR China
| | - Xipeng Lan
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, PR China
| | - Kun Zhou
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, PR China
| | - Peng Xu
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, PR China
| | - Liang Zhang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, PR China
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7
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Zhang P, Zhai X, Huang H, Zhou J, Li X, He Y, Guo Z. Suppression of structural phase transformation of Li-rich Mn-based layered cathode materials with Na ion substitution strategy. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136402] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Yang W, Xiang W, Chen YX, Wu ZG, Hua WB, Qiu L, He FR, Zhang J, Zhong BH, Guo XD. Interfacial Regulation of Ni-Rich Cathode Materials with an Ion-Conductive and Pillaring Layer by Infusing Gradient Boron for Improved Cycle Stability. ACS APPLIED MATERIALS & INTERFACES 2020; 12:10240-10251. [PMID: 32027108 DOI: 10.1021/acsami.9b18542] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Ni-rich cathodes LiNixCoyAl1-x-yO2 (0.8 < x < 1) with high energy density, environmental benignity, and low cost are regarded as the most promising candidate materials for next-generation lithium batteries. Unfortunately, capacity fading derived from unstable surface properties and intrinsic structural instability under extreme conditions limits large-scale commercial utilization. Herein, an interface-regulated Ni-rich cathode material LiNi0.87Co0.10Al0.03O2 with a layer (R3̅m) core, a NiO salt-like (Fm3̅m) phase, and an ultrathin amorphous ion-conductive LiBO2 (LBO) layer is constructed by gradient boron incorporation and lithium-reactive coating during calcination. The ultrathin LBO layer not only exhausts residual lithium species but also acts as a layer for Li+ transport and insulation of detrimental reaction. The NiO salt-like phase in the subsurface could enhance the structural stability of the layer core for the pillar effects. With the positive role provided by the functional hybrid surface layer and boron doping, the modified cathode exhibits enhanced Li+ conductivity, structural stability, reversibility of the H2-H3 phase transition, suppressed side reactions, ameliorated transition-metal dissolution, and excellent electrochemical performance. Especially, a 1% wt boron-modified cathode delivers a discharge capacity of 211.99 mA h g-1 in the potential range of 3.0-4.3 V at 0.2 C and excellent cycle life with a capacity retention of 89.43% after 200 cycles at 1 C.
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Affiliation(s)
- Wen Yang
- College of Chemical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Wei Xiang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, PR China
- Post-doctoral Mobile Research Center of Ruyuan Hec Technology Corporation, Ruyuan, Guangdong 512000, PR China
| | - Yan-Xiao Chen
- College of Chemical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Zhen-Guo Wu
- College of Chemical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Wei-Bo Hua
- Institute for Applied Materials (IAM), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen 76344, Germany
| | - Lang Qiu
- College of Chemical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Feng-Rong He
- Post-doctoral Mobile Research Center of Ruyuan Hec Technology Corporation, Ruyuan, Guangdong 512000, PR China
| | - Jun Zhang
- Post-doctoral Mobile Research Center of Ruyuan Hec Technology Corporation, Ruyuan, Guangdong 512000, PR China
| | - Ben-He Zhong
- College of Chemical Engineering, Sichuan University, Chengdu 610065, PR China
| | - Xiao-Dong Guo
- College of Chemical Engineering, Sichuan University, Chengdu 610065, PR China
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9
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Hu Y, Qin Z, Pei J, Cong B, Yang X, Chen G. Reduced Lithium/Nickel Disorder Degree of Sodium‐Doped Lithium‐Rich Layered Oxides for Cathode Materials: Experiments and Calculations. ChemElectroChem 2020. [DOI: 10.1002/celc.201901846] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yongyuan Hu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of Technology Harbin 150001 P. R. China
| | - Zhongzheng Qin
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of Technology Harbin 150001 P. R. China
| | - Jian Pei
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of Technology Harbin 150001 P. R. China
| | - Bowen Cong
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of Technology Harbin 150001 P. R. China
| | - Xu Yang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of Technology Harbin 150001 P. R. China
| | - Gang Chen
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of Technology Harbin 150001 P. R. China
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10
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Zhou CX, Wang PB, Zhang B, Tang LB, Tong H, He ZJ, Zheng JC. Formation and Effect of Residual Lithium Compounds on Li-Rich Cathode Material Li 1.35[Ni 0.35Mn 0.65]O 2. ACS APPLIED MATERIALS & INTERFACES 2019; 11:11518-11526. [PMID: 30817128 DOI: 10.1021/acsami.9b01806] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Li-rich cathode materials are regarded as ideal cathode materials, owing to their excellent electrochemical capacity. However, residual lithium compounds, which are formed on the surface of the materials by reacting with moisture and carbon dioxide in ambient atmosphere, can impair the surface structure, injure the capacity, and impede the electrode fabrication using Li-rich materials. Exposure to air atmosphere causes the formation of residual lithium compounds; the formation of such compounds is believed to be related to humidity, temperature, and time during handling and storage. In this study, we demonstrated for the first time an artificial strategy for controlling time, temperature, and humidity to accelerate exposure. The formation and effect of residual lithium compounds on Li-rich cathode material Li1.35[Ni0.35Mn0.65]O2 were systematically investigated. The residual lithium compounds formed possessed primarily an amorphous structure and were partially coated on the surface. These compounds include LiOH, Li2O, and Li2CO3. Li2CO3 is the major component in residual lithium compounds. The presence of residual lithium compounds on the material surface led to a high discharge capacity loss and large discharge voltage fading. Understanding the formation and suppressing the effect of residual lithium compounds will help prevent their unfavorable effects and improve the electrochemical performance.
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Affiliation(s)
- Chun-Xian Zhou
- School of Metallurgy and Environment , Central South University , Changsha , Hunan 410083 , China
- Hunan Changyuan Lico Co., Ltd. , Changsha , Hunan 410010 , China
| | - Peng-Bo Wang
- School of Metallurgy and Environment , Central South University , Changsha , Hunan 410083 , China
| | - Bao Zhang
- School of Metallurgy and Environment , Central South University , Changsha , Hunan 410083 , China
| | - Lin-Bo Tang
- School of Metallurgy and Environment , Central South University , Changsha , Hunan 410083 , China
| | - Hui Tong
- School of Metallurgy and Environment , Central South University , Changsha , Hunan 410083 , China
| | - Zhen-Jiang He
- School of Metallurgy and Environment , Central South University , Changsha , Hunan 410083 , China
| | - Jun-Chao Zheng
- School of Metallurgy and Environment , Central South University , Changsha , Hunan 410083 , China
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11
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Chen D, Xie D, Li G, Zhang D, Fan J, Li B, Feng T, Li L. Simply Constructing Li1.2
Mn0.6
Ni0.2
O2
/C Composites for Superior Electrochemical Performance and Thermal Stability in Li-Ion Battery. ChemistrySelect 2018. [DOI: 10.1002/slct.201803236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dandan Chen
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry; College of Chemistry; Jilin University; Changchun 130012 PR China
| | - Dongjiu Xie
- Institute of Soft Matter and Functional Materials; Helmholtz Centre Berlin for Materials and Energy, Hahn-Meitner-Platz 1, Berlin; 14109 Germany
| | - Guangshe Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry; College of Chemistry; Jilin University; Changchun 130012 PR China
| | - Dan Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry; College of Chemistry; Jilin University; Changchun 130012 PR China
| | - Jianming Fan
- College of Chemistry and Materials; Longyan University, Longyan; 364012 P. R. China
| | - Baoyun Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry; College of Chemistry; Jilin University; Changchun 130012 PR China
| | - Tao Feng
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry; College of Chemistry; Jilin University; Changchun 130012 PR China
| | - Liping Li
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry; College of Chemistry; Jilin University; Changchun 130012 PR China
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