Journal
MATERIALS LETTERS
Volume 265, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2020.127418
Keywords
Li-ion batteries; Cathodes; Crystal structure; Microstructure; Energy storage and conversion
Funding
- CNSF [21771136, 51301116]
- Jiangsu Undergraduate Training Program for Innovation and Entrepreneurship [201810332029Z]
- USTS Graduate Research and Practice Innovation Project [SKCX18_Y15]
- Natural Science Foundation of Jiangsu Higher Education Institutions [17KJA140001, 18KJA470004]
- Jiangsu Key Disciplines of Thirteen Five-Year Plan [20168765]
- Jiangsu 333 Project
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Ni-rich LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode particles were coated with anatase TiO2 layer to improve its cycle stability. The TiO2 coating was synthesized by the hydrolyzation method and subsequent annealing treatment ranging from 500 t to 600 degrees C. The well-ordered layered alpha-NaFeO2-type structure survives in the TiO2 coating process. The nanothick anatase TiO2 layer coveres on the surface of NCM811. The annealing temperature of coating was controlled to improve the electrochemical performances. The TiO2-coated NCM811 cathode annealed at 600 t demonstrates the optimal capacity retention of 104.9% after 100 cycles at the current rate of 0.1 C, in contrast to 64.1% of pristine NCM811 and 96.7% of the coated sample annealed at 500 degrees C. (C) 2020 Elsevier B.V. All rights reserved.
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