期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 47, 页码 44036-44045出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b11452
关键词
LiNi08Co0.13Al0.05O2; Li2CO3; polarization; electrochemical decomposition; lithium-ion batteries
资金
- National Natural Science Foundation of China (NSFC) [51474037, 21805083, 21776068]
- State Scholarship Fund of China Scholarship Council [201808430295]
- Hunan Provincial Natural Science Foundation [2018JJ3331, 2017JJ3229, 2018112287]
- Science and Technology Planning Project of Hunan Province [2018TP1017]
- Collaborative Innovation Center of New Chemical Technologies for Environmental Benignity and Efficient Resource Utilization
- NSFC [51728202]
- project Nanotechnology Based Functional Solutions - Norte Portugal Regional Operational Programme (NORTE2020) under the PORTUGAL 2020 Partnership Agreement through the European Regional Development Fund (ERDF) [NORTE-01-0145-FEDER-000019]
Nickel-rich layered oxides are promising cathodes for power batteries owing to their high capacity and low cost. However, during the production, storage, and application of nickel-rich cathodes, especially in case the Ni content exceeds 70%, their surfaces almost inevitably react with ambient air to form electrochemically inert Li2CO3 and LiOH, leading to significant capacity loss and therefore imposing a significant hurdle to practical applications of nickel-rich cathodes. Here, we reveal surface structures and electrochemical properties of the exposed LiNi0.8Co0.15Al0.05O2 (NCA) cathodes and investigate systematically the impact of exposure humidity, temperature, and time on NCA cathodes. We demonstrate that introduction of a 3.0-4.5 V galvanostatic cycling operation at initial cycles can remarkably regenerate the subsequent 3.0-4.3 V battery performances of the exposed cathode. This work represents a facile method to regenerate the battery performance of surface-degraded nickel-rich cathodes, opening up an avenue in fulfilling efficient production, storage, and application of nickel-rich cathode materials.
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