期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 8, 期 22, 页码 11165-11176出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta00448k
关键词
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资金
- Natural Science Foundation of Qinghai Province [2020-ZJ-910]
- National Natural Science Foundation of China [U1604122, 21773055, 51702086, 51672189, 21203055, 21805070, 51572194]
- Program for Science & Technology Innovation Talents in Universities of Henan Province [18HASTIT004]
- Xi'an Science and Technology Project of China [201805037YD15CG21(20)]
- Natural Science Basic Research Plan in Shaanxi Province of China [2019JLP-04]
Due to the continuous decomposition of the in situ solid-electrolyte interphase (SEI) between the electrolyte and anodes such as Li metal, Si, MoS2, etc., the low cycling stability has become one of the challenges for practical application of new-type Li-ion batteries (LIBs) with high energy density. Herein, an artificial LiAlO2 SEI is inserted between the in situ SEI and anode to improve the cycling stability of the batteries, through the formation of lattice-matched interfaces between the artificial LiAlO2 and in situ formed SEI components such as LiF, Li2CO3, LiPO2F2, etc. The lattice-matched interfaces can efficiently suppress mechanical and chemical degradation and retain the in situ SEI and consequently the cell stability through cycling. Taking a conversion-type Ni3S2 electrode as a model system, the stabilization mechanism of the in situ SEI is well illustrated and the reversible capacity attenuation of Ni3S2 from the 2nd to 100th cycle can be significantly reduced from 35.8% to 1.2%, in the presence of the latticematched interfaces. The proposed strategy is highly effective and inspiring to solve the challenge of in situ SEI decomposition and achieve a stable cycling in LIBs with different electrodes.
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