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Shi R, Zheng N, Ji H, Zhang M, Xiao X, Ma J, Chen W, Wang J, Cheng HM, Zhou G. Homogeneous Repair of Highly Degraded Ni-Rich Cathode Material with Spent Lithium Anode. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023:e2311553. [PMID: 38124361 DOI: 10.1002/adma.202311553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/05/2023] [Indexed: 12/23/2023]
Abstract
Direct regeneration of spent lithium-ion batteries has received wide attention owing to its potential for resource reuse and environmental benefits. The repair effect of direct regeneration methods undergoing heterogeneous repair process is usually inferior, while homogenous repair process plays a vital role to achieve satisfactory repair results. However, the practical applications of current homogeneous repair methods are challenged by the complex operations and relatively high costs owing to the requirement of additional heating or pressurization. Herein, this work proposes a simple strategy to achieve homogeneous repair of spent cathode materials under relatively mild conditions by uniformly precoating lithium source at room temperature and atmospheric pressure. Followed by annealing, highly degraded LiNi0.83 Co0.12 Mn0.05 O2 with severe Li deficiency and irreversible phase transition is repaired to have an initial capacity of 181.6 mAh g-1 and capacity retention of 80.7% after 150 cycles at 0.5 C. The lithium source used in this strategy is from the spent lithium anode. Moreover, this strategy is suitable for the direct regeneration of various layer oxide cathode materials with different failure degrees. This work provides both theoretical guidance and practical examples for the straightforward, effective, and universally applicable direct regeneration methods.
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Affiliation(s)
- Ruyu Shi
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Nengzhan Zheng
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Haocheng Ji
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Mengtian Zhang
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Xiao Xiao
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Jun Ma
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Wen Chen
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Junxiong Wang
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Hui-Ming Cheng
- Faculty of Materials Science and Energy Engineering/Institute of Technology for Carbon Neutrality, Shenzhen Institute of Advanced Technology, Chinese Academy of Science, Shenzhen, 518055, China
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Guangmin Zhou
- Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
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Zhang G, Wang H, Yang Z, Xie H, Jia Z, Xiong Y. Enhancing the Electrochemical Stability of LiNi 0.8Co 0.1Mn 0.1O 2 Compounds for Lithium-Ion Batteries via Tailoring Precursors Synthesis Temperatures. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5398. [PMID: 37570101 PMCID: PMC10420146 DOI: 10.3390/ma16155398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/23/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023]
Abstract
LiNi0.8Co0.1Mn0.1O2 (LNCMO) cathode materials for lithium-ion batteries (LIBs) were prepared by the hydrothermal synthesis of precursors and high-temperature calcination. The effect of precursor hydrothermal synthesis temperature on the microstructures and electrochemical cycling performances of the Ni-rich LNCMO cathode materials were investigated by SEM, XRD, XPS and electrochemical tests. The results showed that the cathode material prepared using the precursor synthesized at a hydrothermal temperature of 220 °C exhibited the best charge/discharge cycle stability, whose specific capacity retention rate reached 81.94% after 50 cycles. Such enhanced cyclic stability of LNCMO was directly related to the small grain size, high crystallinity and structural stability inherited from the precursor obtained at 220 °C.
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Affiliation(s)
- Guanhua Zhang
- Queen Mary University of London Engineering School, Northwestern Polytechnical University, Xi’an 710100, China
| | - Hao Wang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Zihan Yang
- Queen Mary University of London Engineering School, Northwestern Polytechnical University, Xi’an 710100, China
| | - Haoyang Xie
- Queen Mary University of London Engineering School, Northwestern Polytechnical University, Xi’an 710100, China
| | - Zhenggang Jia
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Yueping Xiong
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
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