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Wang J, Lei X, Guo S, Zhang X, Deng Y, Ma Q, Jin M, Zhao L, Wang X, Chen Z, Su D. Molybdenum-Doped Cobalt-Free Cathode Realizing the Electrochemical Stability by Enhanced Covalent Bonding. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2403828. [PMID: 39031862 DOI: 10.1002/smll.202403828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 06/12/2024] [Indexed: 07/22/2024]
Abstract
The doping strategy effectively enhances the capacity and cycling stability of cobalt-free nickel-rich cathodes. Understanding the intrinsic contributions of dopants is of great importance to optimize the performances of cathodes. This study investigates the correlation between the structure modification and their performances of Mo-doped LiNi0.8Mn0.2O2 (NM82) cathode. The role of doped Mo's valence state has been proved functional in both lattice structural modification and electronic state adjustment. Although the high-valence of Mo at the cathode surface inevitably reduces Ni valence for electronic neutrality and thus causes ion mixing, the original Mo valence will influence its diffusion depth. Structural analyses reveal Mo doping leads to a mixed layer on the surface, where high-valence Mo forms a slender cation mixing layer, enhancing structural stability and Li-ion transport. In addition, it is found that the high-valence dopant of Mo6+ ions partially occupies the unfilled 4d orbitals, which may strengthen the Mo─O bond through increased covalency and therefore reduce the oxygen mobility. This results in an impressive capacity retention (90.0% after 200 cycles) for Mo-NM82 cathodes with a high Mo valence state. These findings underscore the valence effect of doping on layered oxide cathode performance, offering guidance for next-generation cathode development.
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Affiliation(s)
- Jiayi Wang
- Institute of Carbon Neutrality, Zhejiang Wanli University, Ningbo, 315100, China
| | - Xincheng Lei
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Shengnan Guo
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Xiaomin Zhang
- Institute of Carbon Neutrality, Zhejiang Wanli University, Ningbo, 315100, China
| | - Yaping Deng
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
- Department of Chemical Engineering, University of Waterloo, Waterloo, N2L 3G1, Canada
| | - Qianyi Ma
- Department of Chemical Engineering, University of Waterloo, Waterloo, N2L 3G1, Canada
| | - Mingliang Jin
- South China Academy of Advanced Optoelectronics & College of Semiconductor Science and Technology, South China Normal University, Guangdong, 510006, China
| | - Lingzhi Zhao
- South China Academy of Advanced Optoelectronics & College of Semiconductor Science and Technology, South China Normal University, Guangdong, 510006, China
| | - Xin Wang
- Institute of Carbon Neutrality, Zhejiang Wanli University, Ningbo, 315100, China
- South China Academy of Advanced Optoelectronics & College of Semiconductor Science and Technology, South China Normal University, Guangdong, 510006, China
| | - Zhongwei Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Dong Su
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
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2
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Xu X, Liu J, Wang B, Wang J, Wang Y, Meng W, Cai F. A Study on the Microstructure Regulation Effect of Niobium Doping on LiNi 0.88Co 0.05Mn 0.07O 2 and the Electrochemical Performance of the Composite Material under High Voltage. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2127. [PMID: 38730933 PMCID: PMC11084928 DOI: 10.3390/ma17092127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 04/24/2024] [Accepted: 04/26/2024] [Indexed: 05/13/2024]
Abstract
High-nickel ternary materials are currently the most promising lithium battery cathode materials due to their development and application potential. Nevertheless, these materials encounter challenges like cation mixing, lattice oxygen loss, interfacial reactions, and microcracks. These issues are exacerbated at high voltages, compromising their cyclic stability and safety. In this study, we successfully prepared Nb5+-doped high-nickel ternary cathode materials via a high-temperature solid-phase method. We investigated the impact of Nb5+ doping on the microstructure and electrochemical properties of LiNi0.88Co0.05Mn0.07O2 ternary cathode materials by varying the amount of Nb2O5 added. The experimental results suggest that Nb5+ doping does not alter the crystal structure but modifies the particle morphology, yielding radially distributed, elongated, rod-like structures. This morphology effectively mitigates the anisotropic volume changes during cycling, thereby bolstering the material's cyclic stability. The material exhibits a discharge capacity of 224.4 mAh g-1 at 0.1C and 200.3 mAh g-1 at 1C, within a voltage range of 2.7 V-4.5 V. Following 100 cycles at 1C, the capacity retention rate maintains a high level of 92.9%, highlighting the material's remarkable capacity retention and cyclic stability under high-voltage conditions. The enhancement of cyclic stability is primarily due to the synergistic effects caused by Nb5+ doping. Nb5+ modifies the particle morphology, thereby mitigating the formation of microcracks. The formation of high-energy Nb-O bonds prevents oxygen precipitation at high voltages, minimizes the irreversibility of the H2-H3 phase transition, and thereby enhances the stability of the composite material at high voltages.
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Affiliation(s)
| | | | | | | | | | | | - Feipeng Cai
- Energy Research Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China; (X.X.); (B.W.)
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3
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Lee S, Song G, Yun B, Kim T, Choi SH, Kim H, Doo SW, Lee KT. Revealing the Nanoscopic Corrosive Degradation Mechanism of Nickel-Rich Layered Oxide Cathodes at Low State-of-Charge Levels: Corrosion Cracking and Pitting. ACS NANO 2024; 18:10566-10581. [PMID: 38556986 DOI: 10.1021/acsnano.4c00202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Ni-rich layered oxides have received significant attention as promising cathode materials for Li-ion batteries due to their high reversible capacity. However, intergranular and intragranular cracks form at high state-of-charge (SOC) levels exceeding 4.2 V (vs. Li/Li+), representing a prominent failure mechanism of Ni-rich layered oxides. The nanoscale crack formation at high SOC levels is attributed to a significant volume change resulting from a phase transition between the H2 and H3 phases. Herein, in contrast to the electrochemical crack formation at high SOC levels, another mechanism of chemical crack and pit formation on a nanoscale is directly evidenced in fully lithiated Ni-rich layered oxides (low SOC levels). This mechanism is associated with intergranular stress corrosion cracking, driven by chemical corrosion at elevated temperatures. The nanoscopic chemical corrosion behavior of Ni-rich layered oxides during aging at elevated temperatures is investigated using high-resolution transmission electron microscopy, revealing that microcracks can develop through two distinct mechanisms: electrochemical cycling and chemical corrosion. Notably, chemical corrosion cracks can occur even in a fully discharged state (low SOC levels), whereas electrochemical cracks are observed only at high SOC levels. This finding provides a comprehensive understanding of the complex failure mechanisms of Ni-rich layered oxides and provides an opportunity to improve their electrochemical performance.
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Affiliation(s)
- Suyeon Lee
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Gawon Song
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Byunghyun Yun
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Taehun Kim
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Seung Hyun Choi
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Hanseul Kim
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Sung Wook Doo
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Kyu Tae Lee
- School of Chemical and Biological Engineering, Institute of Chemical Processes, Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
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4
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Li H, Wang L, Song Y, Zhang Z, Du A, Tang Y, Wang J, He X. Why the Synthesis Affects Performance of Layered Transition Metal Oxide Cathode Materials for Li-Ion Batteries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2312292. [PMID: 38216139 DOI: 10.1002/adma.202312292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 12/28/2023] [Indexed: 01/14/2024]
Abstract
The limited cyclability of high-specific-energy layered transition metal oxide (LiTMO2) cathode materials poses a significant challenge to the industrialization of batteries incorporating these materials. This limitation can be attributed to various factors, with the intrinsic behavior of the crystal structure during the cycle process being a key contributor. These factors include phase transition induced cracks, reduced Li active sites due to Li/Ni mixing, and slower Li+ migration. In addition, the presence of synthesis-induced heterogeneous phases and lattice defects cannot be disregarded as they also contribute to the degradation in performance. Therefore, gaining a profound understanding of the intricate relationship among material synthesis, structure, and performance is imperative for the development of LiTMO2. This paper highlights the pivotal role of structural play in LiTMO2 materials and provides a comprehensive overview of how various control factors influence the specific pathways of structural evolution during the synthesis process. In addition, it summarizes the scientific challenges associated with diverse modification approaches currently employed to address the cyclic failure of materials. The overarching goal is to provide readers with profound insights into the study of LiTMO2.
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Affiliation(s)
- Hang Li
- School of Automotive Studies, Tongji University, Shanghai, 201804, China
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
| | - Li Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
| | - Youzhi Song
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
| | - Zhiguo Zhang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
| | - Aimin Du
- School of Automotive Studies, Tongji University, Shanghai, 201804, China
| | - Yaping Tang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
| | - Jianlong Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
| | - Xiangming He
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
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5
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Zeng C, Fan F, Zheng R, Wang X, Tian G, Liu S, Liu P, Wang C, Wang S, Shu C. Structure and Charge Regulation Strategy Enabling Superior Cycling Stability of Ni-Rich Cathode Materials. ACS APPLIED MATERIALS & INTERFACES 2024; 16:11377-11388. [PMID: 38388356 DOI: 10.1021/acsami.3c15370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Ni-rich layered oxides LiNixCoyMn1-x-yO2 (NCMs, x > 0.8) are the most promising cathode candidates for Li-ion batteries because of their superior specific capacity and cost affordability. Unfortunately, NCMs suffer from a series of formidable challenges such as structural instability and incompatibility with commonly used electrolytes, which seriously hamper their practical applications on a large scale. Herein, the Al/Ta codoping modification strategy is proposed to improve the performance of the LiNi0.83Co0.1Mn0.07O2 cathode, and the as-prepared Al/Ta-modified LiNi0.83Co0.1Mn0.07O2 delivers exceptional cycling stability with a capacity retention of 97.4% after 150 cycles at 1C and an excellent rate performance with a high capacity of 143.2 mAh g-1 even at 3C. Based on the experimental study, it is found that the structural stability of NCM is strengthened due to the regulated coordination of oxygen by introducing a robust Ta-O covalent bond, which prevents the layered structure from collapsing. Moreover, the reconstructed rock-salt-like surface is capable of effectively inhibiting interfacial side reactions as well as the overgrowth of the cathode-electrolyte interface. Theoretically, the energy of Li/Ni mixing is significantly increased with the introduction of Al and Ta elements in Al/Ta codoped NCM, leading to inhibited adverse phase transition during cycling. A feasible pathway for designing and developing advanced Ni-rich cathode materials for Li-ion batteries is provided in this work.
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Affiliation(s)
- Chenrui Zeng
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, P. R. China
| | - Fengxia Fan
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, P. R. China
| | - Ruixin Zheng
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, P. R. China
| | - Xinxiang Wang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, P. R. China
| | - Guilei Tian
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, P. R. China
| | - Sheng Liu
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, P. R. China
| | - Pengfei Liu
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, P. R. China
| | - Chuan Wang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, P. R. China
| | - Shuhan Wang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, P. R. China
| | - Chaozhu Shu
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, P. R. China
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6
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Wang E, Ye X, Zhang B, Qu B, Guo J, Zheng S. Enhancing the Stability of 4.6 V LiCoO 2 Cathode Material via Gradient Doping. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:147. [PMID: 38251112 PMCID: PMC10820433 DOI: 10.3390/nano14020147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 12/30/2023] [Accepted: 01/04/2024] [Indexed: 01/23/2024]
Abstract
LiCoO2 (LCO) can deliver ultrahigh discharge capacities as a cathode material for Li-ion batteries when the charging voltage reaches 4.6 V. However, establishing a stable LCO cathode at a high cut-off voltage is a challenge in terms of bulk and surface structural transformation. O2 release, irreversible structural transformation, and interfacial side reactions cause LCO to experience severe capacity degradation and safety problems. To solve these issues, a strategy of gradient Ta doping is proposed to stabilize LCO against structural degradation. Additionally, Ta1-LCO that was tuned with 1.0 mol% Ta doping demonstrated outstanding cycling stability and rate performance. This effect was explained by the strong Ta-O bonds maintaining the lattice oxygen and the increased interlayer spacing enhancing Li+ conductivity. This work offers a practical method for high-energy Li-ion battery cathode material stabilization through the gradient doping of high-valence elements.
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Affiliation(s)
- Errui Wang
- College of Chemistry and Material Engineering, Anhui Science and Technology University, Bengbu 233030, China (B.Z.)
- Anhui Province Quartz Sand Purification and Photovoltaic Glass Engineering Research Center, Anhui Science and Technology University, Bengbu 233030, China
| | - Xiangju Ye
- College of Chemistry and Material Engineering, Anhui Science and Technology University, Bengbu 233030, China (B.Z.)
| | - Bentian Zhang
- College of Chemistry and Material Engineering, Anhui Science and Technology University, Bengbu 233030, China (B.Z.)
- Anhui Province Quartz Sand Purification and Photovoltaic Glass Engineering Research Center, Anhui Science and Technology University, Bengbu 233030, China
| | - Bo Qu
- College of Chemistry and Material Engineering, Anhui Science and Technology University, Bengbu 233030, China (B.Z.)
| | - Jiahao Guo
- College of Chemistry and Material Engineering, Anhui Science and Technology University, Bengbu 233030, China (B.Z.)
- Anhui Province Quartz Sand Purification and Photovoltaic Glass Engineering Research Center, Anhui Science and Technology University, Bengbu 233030, China
| | - Shengbiao Zheng
- College of Chemistry and Material Engineering, Anhui Science and Technology University, Bengbu 233030, China (B.Z.)
- Anhui Province Quartz Sand Purification and Photovoltaic Glass Engineering Research Center, Anhui Science and Technology University, Bengbu 233030, China
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7
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Surface Doping vs. Bulk Doping of Cathode Materials for Lithium-Ion Batteries: A Review. ELECTROCHEM ENERGY R 2023. [DOI: 10.1007/s41918-022-00155-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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8
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Qiu Z, Wang Z, Yuan S. How sintering temperature affects the electrochemical performance of ultra-high nickel (Ni > 0.9) cathode material. J Colloid Interface Sci 2023; 656:225-232. [PMID: 37989055 DOI: 10.1016/j.jcis.2023.11.098] [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: 08/23/2023] [Revised: 11/15/2023] [Accepted: 11/16/2023] [Indexed: 11/23/2023]
Abstract
The burgeoning demand for electric vehicles with extended driving ranges has propelled ongoing development efforts for ultra-high nickel (Ni > 0.9) cathode materials. Despite significant ongoing research focused on Ni-rich cathode materials, a more comprehensive foundational understanding of ultra-high nickel cathode materials is essential. In our research, we employed LiNi0.94Co0.06O2 as a model ultra-high nickel cathode material to systematically delve into the interplay between sintering temperature, structural features, and electrochemical behavior. Within a sintering temperature spectrum of 660-720 °C, we discerned that specimens produced at diminished temperatures manifest a reduced initial discharge capacity yet excel in cycling endurance. In stark contrast, their counterparts produced at augmented temperatures behave inversely. Identifying a singular sintering temperature that achieves equilibrium between initial discharge capacity and cycling performance proves elusive. Through X-ray diffraction and high-resolution transmission electron microscopy, it became evident that samples synthesized at lower temperatures exhibit pronounced lithium-nickel mixing and develop a thicker NiO layer on the surface, leading to compromised initial discharge performance and capacity. Utilizing focused ion beam scanning electron microscopy, differential capacity analysis, and in-situ X-ray diffraction, we confirm that samples synthesized at lower temperatures possess smaller particle sizes, enabling them to withstand volumetric expansion stress during cycling, resulting in enhanced cycling performance. In the realm of ultra-high nickel cathode materials, elevating the sintering temperature is a conduit to superior initial discharge efficiency and capacity. Yet, the imperative of preserving diminutive particle dimensions, as a stratagem to bolster cycling performance, stands out as a pivotal research frontier.
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Affiliation(s)
- Zhenping Qiu
- School of Applied Physics and Materials, Wuyi University, Jiangmen, Guangdong 529020, PR China.
| | - Zhiwen Wang
- School of Applied Physics and Materials, Wuyi University, Jiangmen, Guangdong 529020, PR China
| | - Shun Yuan
- School of Applied Physics and Materials, Wuyi University, Jiangmen, Guangdong 529020, PR China
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9
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Yang P, Zhang S, Wei Z, Guan X, Xia J, Huang D, Xing Y, He J, Wen B, Liu B, Xu H. A Gradient Doping Strategy toward Superior Electrochemical Performance for Li-Rich Mn-Based Cathode Materials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2207797. [PMID: 36808233 DOI: 10.1002/smll.202207797] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 02/04/2023] [Indexed: 05/18/2023]
Abstract
Lithium-rich layered oxides (LLOs) are concerned as promising cathode materials for next-generation lithium-ion batteries due to their high reversible capacities (larger than 250 mA h g-1 ). However, LLOs suffer from critical drawbacks, such as irreversible oxygen release, structural degradation, and poor reaction kinetics, which hinder their commercialization. Herein, the local electronic structure is tuned to improve the capacity energy density retention and rate performance of LLOs via gradient Ta5+ doping. As a result, the capacity retention elevates from 73% to above 93%, and the energy density rises from 65% to above 87% for LLO with modification at 1 C after 200 cycles. Besides, the discharge capacity for the Ta5+ doped LLO at 5 C is 155 mA h g-1 , while it is only 122 mA h g-1 for bare LLO. Theoretical calculations reveal that Ta5+ doping can effectively increase oxygen vacancy formation energy, thus guaranteeing the structure stability during the electrochemical process, and the density of states results indicate that the electronic conductivity of the LLOs can be boosted significantly at the same time. This strategy of gradient doping provides a new avenue to improve the electrochemical performance of the LLOs by modulating the local structure at the surface.
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Affiliation(s)
- Puheng Yang
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
- School of Physics Science and Nuclear Energy Engineering, Beihang University, Beijing, 100191, China
| | - Shichao Zhang
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Ziwei Wei
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Xianggang Guan
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Jun Xia
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Danyang Huang
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China
| | - Yalan Xing
- School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Jia He
- Tianjin Key Laboratory of Advanced Functional Porous Materials, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China
| | - Bohua Wen
- Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Bin Liu
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, P. R. China
| | - Huaizhe Xu
- School of Physics Science and Nuclear Energy Engineering, Beihang University, Beijing, 100191, China
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10
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Qi MY, Zhang SD, Guo S, Ji PX, Mao JJ, Wu TT, Lu SQ, Zhang X, Chen SG, Su D, Chen GH, Cao AM. Integrated Surface Modulation of Ultrahigh Ni Cathode Materials for Improved Battery Performance. SMALL METHODS 2023:e2300280. [PMID: 37086111 DOI: 10.1002/smtd.202300280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Indexed: 05/03/2023]
Abstract
Ni-rich layered cathodes with ultrahigh nickel content (≥90%), for example LiNi0.9 Co0.1 O2 (NC0.9), are promising for next-generation high-energy Li-ion batteries (LIBs), but face stability issues related to structural degradation and side reactions during the electrochemical process. Here, surface modulation is demonstrated by integrating a Li+ -conductive nanocoating and gradient lattice doping to stabilize the active cathode efficiently for extended cycles. Briefly, a wet-chemistry process is developed to deposit uniform ZrO(OH)2 nanoshells around Ni0.905 Co0.095 (OH)2 (NC0.9-OH) hydroxide precursors, followed by high temperature lithiation to create reinforced products featuring Zr doping in the crust lattice decorated with Li2 ZrO3 nanoparticles on the surface. It is identified that the Zr4+ infiltration reconstructed the surface lattice into favorable characters such as Li+ deficiency and Ni3+ reduction, which are effective to combat side reactions and suppress phase degradation and crack formation. This surface control is able to achieve an optimized balance between surface stabilization and charge transfer, resulting in an extraordinary capacity retention of 96.6% after 100 cycles at 1 C and an excellent rate capability of 148.8 mA h g-1 at 10 C. This study highlights the critical importance of integrated surface modulation for high stability of cathode materials in next-generation LIBs.
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Affiliation(s)
- Mu-Yao Qi
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Si-Dong Zhang
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Sijie Guo
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Peng-Xiang Ji
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
| | - Jian-Jun Mao
- Department of Chemistry, The University of Hong Kong, Hong Kong, SAR, 999077, P. R. China
- Hong Kong Quantum AI Lab Limited, Hong Kong, SAR, 999077, P. R. China
| | - Ting-Ting Wu
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Advanced Material Processing & Mold (Ministry of Education), Zhengzhou University, Zhengzhou, 450002, P. R. China
| | - Si-Qi Lu
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Xing Zhang
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
| | - Shu-Guang Chen
- Department of Chemistry, The University of Hong Kong, Hong Kong, SAR, 999077, P. R. China
- Hong Kong Quantum AI Lab Limited, Hong Kong, SAR, 999077, P. R. China
| | - Dong Su
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
| | - Guan-Hua Chen
- Department of Chemistry, The University of Hong Kong, Hong Kong, SAR, 999077, P. R. China
- Hong Kong Quantum AI Lab Limited, Hong Kong, SAR, 999077, P. R. China
| | - An-Min Cao
- CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, and Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences (UCAS), Beijing, 100049, P. R. China
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11
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Wang L, Liu G, Wang R, Wang X, Wang L, Yao Z, Zhan C, Lu J. Regulating Surface Oxygen Activity by Perovskite-Coating-Stabilized Ultrahigh-Nickel Layered Oxide Cathodes. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2209483. [PMID: 36579784 DOI: 10.1002/adma.202209483] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 12/04/2022] [Indexed: 06/17/2023]
Abstract
Ultrahigh-Ni layered oxides are proposed as promising cathodes to fulfill the range demand of electric vehicles; yet, they are still haunted by compromised cyclability and thermal robustness. State-of-the-art surface coating has been applied to solve the instability via blocking the physical contact between the electrolyte and the highly active Ni4+ ions on the cathode surface, but it falls short in handling the chemo-physical mobility of the oxidized lattice oxygen ions in the cathode. Herein, a direct regulation strategy is proposed to accommodate the highly active anionic redox within the solid phase. By leveraging the stable oxygen vacancies/interstitials in a lithium and oxygen dual-ion conductor (layered perovskite La4 NiLiO8 ) coating layer, the reactivity of the surface lattice oxygen ion is dramatically restrained. As a result, the oxygen release from the lattice is suppressed, as well as the undesired irreversible phase transition and intergranular mechanical cracking. Meanwhile, the introduced dual-ion conductor can also facilitate lithium-ion diffusion kinetics and electronic conductivity on the particle surface. This work demonstrates that accommodating the anionic redox chemistry by dual-ion conductors is an effective strategy for capacity versus stability juggling of the high-energy cathodes.
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Affiliation(s)
- Lifan Wang
- State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Department of Energy Storage Science and Engineering, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Guicheng Liu
- Department of Physics, Dongguk University, Seoul, 04620, Republic of Korea
| | - Rui Wang
- State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Department of Energy Storage Science and Engineering, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xindong Wang
- State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Department of Energy Storage Science and Engineering, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Liguang Wang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Zhenpeng Yao
- Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai, 200240, China
- Innovation Center for Future Materials, Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai, 201203, China
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Chun Zhan
- State Key Laboratory of Advanced Metallurgy, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- Department of Energy Storage Science and Engineering, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Jun Lu
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
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12
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Zhu H, Wang Z, Chen L, Hu Y, Jiang H, Li C. Strain Engineering of Ni-Rich Cathode Enables Exceptional Cyclability in Pouch-Type Full Cells. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2209357. [PMID: 36515215 DOI: 10.1002/adma.202209357] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Ni-rich layered oxides are at the forefront of the development of high-energy Li-ion batteries, yet the extensive applications are retarded by the deteriorative capacity and thermal instability. Herein, an in situ co-precipitation strategy is implemented to achieve the novel super-dispersed Nb-doped Ni-rich cathode that consists of the elongated and radially aligned primary particles with increased oxygen stable {001} planes. The unique microstructure homogenizes the intragranular and intergranular strain distribution and stabilizes the spherical secondary particles, effectively inhibiting microcrack formation and propagation and surface degradation. The super-dispersed Nb doping prevents the Li/Ni disordering and lattice oxygen escape, thereby further strengthening the crystal structure and thermal stability. Accordingly, this cathode delivers a high reversible capacity of 229.0 mAh g-1 at 0.1 C with much better retention at 55 °C and 5 C after 100 cycles than the conventional Nb-doped Ni-rich cathodes. In a pouch-type full cell, it exhibits exceptionally long life with a capacity retention of 91.9% at 1 C after 500 cycles and 80.5% at 5 C after 2000 cycles within 3.0-4.2 V, greatly prolonging the service period to cater to the lightweight and intelligence of electric vehicles.
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Affiliation(s)
- Huawei Zhu
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Zhihong Wang
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Ling Chen
- Shanghai Engineering Research Center of Hierarchical Nanomaterials, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Yanjie Hu
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Hao Jiang
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
- Shanghai Engineering Research Center of Hierarchical Nanomaterials, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Chunzhong Li
- Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
- Shanghai Engineering Research Center of Hierarchical Nanomaterials, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China
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13
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Huang W, Li W, Gao M, Wang X, Wang J, Zhuang W. Integrated Modification Strategy Enables Remarkable Cyclability and Thermal Stability of Ni-Rich Cathode Materials for Lithium-Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2022; 14:43085-43094. [PMID: 36106444 DOI: 10.1021/acsami.2c07453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Structural degradation and surface chemical instability are dominant issues of Ni-rich layered cathodes, which trigger capacity fading and safety concerns, hindering the extensive application of Ni-rich cathodes toward high-energy, long-life lithium-ion batteries. Here, by combining trace Ta doping and an ultrathin Zr-Y mixed oxide coating, an integrated modification strategy significantly improves the cycling and thermal stability of Ni-rich LiNi0.88Co0.10Al0.02O2 (NCA) cathodes. The integrated modified Ni-rich cathode provides an unprecedented comprehensive performance with a high discharge capacity of 212.2 mA h g-1 at 0.1 C, an 88.6% cycling retention after 500 cycles at 1 C, and a high exothermic peak temperature of 261 °C compared with the pristine NCA cathode (67.4% capacity retention for 500 cycles and 221 °C for the exothermic peak). Further mechanism studies illustrate that a dual-structural surface constructed of a rock salt surface induced by Ta doping and ultrathin Zr-Y mixed oxide coating jointly suppresses surface side reactions between cathodes and electrolytes. Moreover, trace Ta doping in the bulk stabilizes the bulk structure and prevents mechanical cracks. This study highlights the importance of comprehensive modification of the bulk and surface for improving the electrochemical performance and provides a potential optimizing strategy for the commercialization of high-capacity Ni-rich cathode materials.
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Affiliation(s)
- Wei Huang
- National Power Battery Innovation Center, Grinm Group Corporation Limited, Beijing 100088, China
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
- China Automotive Battery Research Institute Co. Ltd., Beijing 101407, China
- General Research Institute for Nonferrous Metals, Beijing 100088, China
| | - Wenjin Li
- College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China
| | - Min Gao
- National Power Battery Innovation Center, Grinm Group Corporation Limited, Beijing 100088, China
- China Automotive Battery Research Institute Co. Ltd., Beijing 101407, China
| | - Xiaodan Wang
- National Power Battery Innovation Center, Grinm Group Corporation Limited, Beijing 100088, China
- China Automotive Battery Research Institute Co. Ltd., Beijing 101407, China
| | - Jiantao Wang
- National Power Battery Innovation Center, Grinm Group Corporation Limited, Beijing 100088, China
- China Automotive Battery Research Institute Co. Ltd., Beijing 101407, China
- General Research Institute for Nonferrous Metals, Beijing 100088, China
| | - Weidong Zhuang
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
- General Research Institute for Nonferrous Metals, Beijing 100088, China
- Beijing Key Laboratory of Green Recovery and Extraction of Rare and Precious Metals, University of Science and Technology Beijing, Beijing 100083, China
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14
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Liu Y, Wang D, Li P, Liu Y, Sun Y, Liu Y, Zhong B, Wu Z, Guo X. The Relationship between Initial Coulombic Efficiency and Transition Metal Ion Redox in P2-Na 0.85[Cu 0.1Fe xMn 1–x]O 2 Cathodes. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yalan Liu
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Dong Wang
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Ping Li
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Yihua Liu
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Yan Sun
- School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China
| | - Yang Liu
- School of Materials Science and Engineering, Henan Normal University, XinXiang, 453007, China
| | - Benhe Zhong
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Zhenguo Wu
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Xiaodong Guo
- School of Chemical Engineering, Sichuan University, Chengdu, 610065, China
- School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China
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15
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Liu X, Hao J, Zhang M, Zheng B, Zhao D, Cheng Y, He Z, Su M, Xie C, Luo M, Shan P, Tao M, Liang Z, Xiang Y, Yang Y. Mitigating the Surface Reconstruction of Ni-Rich Cathode via P2-Type Mn-Rich Oxide Coating for Durable Lithium Ion Batteries. ACS APPLIED MATERIALS & INTERFACES 2022; 14:30398-30409. [PMID: 35748137 DOI: 10.1021/acsami.2c06264] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Ni-rich materials have received widespread attention as one of the mainstream cathodes in high-energy-density lithium-ion batteries for electric vehicles. However, Ni-rich cathodes suffer from severe surface reconstruction in a high delithiation state, constraining their rate capabilities and life span. Herein, a novel P2-type NaxNi0.33Mn0.67O2 (NNMO) is rationally selected as the surficial modification layer for LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode, which undergoes a spontaneous Na+-Li+ exchange reaction to form an O2-type LixNi0.33Mn0.67O2 (LNMO) layer revealed by combining X-ray diffraction and solid-state nuclear magnetic resonance techniques. Owing to the specific oxygen stacking sequence, O2-type LNMO significantly prevents the initial layered structure of NCM811 from transforming to the spinel or rock-salt phases during cycling, thus effectively maintaining the integral surficial structure and the Li+ diffusion channels of NCM811. Eventually, the NNMO@NCM811 electrode yields enhanced thermal stability, outstanding rate performance, and long cycling stability with 80% capacity retention after 294 cycles at 200 mA g-1, and its life span is further extended to 531 cycles while enhancing the mechanical stability of the bulk material.
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Affiliation(s)
- Xiangsi Liu
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jialiang Hao
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Maojie Zhang
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Bizhu Zheng
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Danhui Zhao
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yong Cheng
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- State Key Laboratory for Physical Chemistry of Solid Surface, College of Materials, Xiamen University, Xiamen 361105, China
| | - Zhanning He
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Mintao Su
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Chenpeng Xie
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Mingzeng Luo
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Peizhao Shan
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Mingming Tao
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Ziteng Liang
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yuxuan Xiang
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yong Yang
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
- School of Energy Research, Xiamen University, Xiamen 361005, China
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16
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Zhu H, Yao Z, Zhu H, Huang Y, Zhang J, Li CC, Wiaderek KM, Ren Y, Sun C, Zhou H, Fan L, Chen Y, Xia H, Gu L, Lan S, Liu Q. Unblocking Oxygen Charge Compensation for Stabilized High-Voltage Structure in P2-Type Sodium-Ion Cathode. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2200498. [PMID: 35347886 PMCID: PMC9165493 DOI: 10.1002/advs.202200498] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/26/2022] [Indexed: 06/14/2023]
Abstract
Layered transition-metal (TM) oxides are ideal hosts for Li+ charge carriers largely due to the occurrence of oxygen charge compensation that stabilizes the layered structure at high voltage. Hence, enabling charge compensation in sodium layered oxides is a fascinating task for extending the cycle life of sodium-ion batteries. Herein a Ti/Mg co-doping strategy for a model P2-Na2/3 Ni1/3 Mn2/3 O2 cathode material is put forward to activate charge compensation through highly hybridized O2 p TM3 d covalent bonds. In this way, the interlayer OO electrostatic repulsion is weakened upon deeply charging, which strongly affects the systematic total energy that transforms the striking P2-O2 interlayer contraction into a moderate solid-solution-type evolution. Accordingly, the cycling stability of the codoped cathode material is improved superiorly over the pristine sample. This study starts a perspective way of optimizing the sodium layered cathodes by rational structural design coupling electrochemical reactions, which can be extended to widespread battery researches.
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Affiliation(s)
- He Zhu
- Department of PhysicsCity University of Hong KongHong Kong999077P. R. China
| | - Zhenpeng Yao
- Center of Hydrogen ScienceShanghai Jiao Tong UniversityShanghai200240P. R. China
- Innovation Center for Future MaterialsZhangjiang Institute for Advanced StudyShanghai Jiao Tong UniversityShanghai201203P. R. China
- The State Key Laboratory of Metal Matrix CompositesSchool of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240P. R. China
- Department of Chemistry and Chemical BiologyHarvard UniversityCambridgeMA02138USA
| | - Hekang Zhu
- Department of PhysicsCity University of Hong KongHong Kong999077P. R. China
| | - Yalan Huang
- Department of PhysicsCity University of Hong KongHong Kong999077P. R. China
| | - Jian Zhang
- Department of PhysicsCity University of Hong KongHong Kong999077P. R. China
| | - Cheng Chao Li
- School of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou510006P. R. China
| | | | - Yang Ren
- Department of PhysicsCity University of Hong KongHong Kong999077P. R. China
| | - Cheng‐Jun Sun
- X‐Ray Science DivisionArgonne National LaboratoryArgonneIL60439USA
| | - Hua Zhou
- X‐Ray Science DivisionArgonne National LaboratoryArgonneIL60439USA
| | - Longlong Fan
- College of Physics and Materials ScienceTianjin Normal UniversityTianjin300387P. R. China
| | - Yanan Chen
- School of Materials Science and EngineeringTianjin UniversityTianjin300072P. R. China
| | - Hui Xia
- School of Material Science and EngineeringNanjing University of Science and TechnologyNanjing210094P. R. China
| | - Lin Gu
- Institute of PhysicsChinese Academy of SciencesBeijing100190P. R. China
| | - Si Lan
- School of Material Science and EngineeringNanjing University of Science and TechnologyNanjing210094P. R. China
- Shenzhen Research InstituteCity University of Hong KongShenzhen518057P. R. China
| | - Qi Liu
- Department of PhysicsCity University of Hong KongHong Kong999077P. R. China
- Center for Neutron ScatteringCity University of Hong KongHong Kong999077P. R. China
- Shenzhen Research InstituteCity University of Hong KongShenzhen518057P. R. China
- Hong Kong Institute for Clean EnergyCity University of Hong KongHong Kong999077P. R. China
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