期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 11, 页码 9718-9725出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b00070
关键词
lithium-ion batteries; layered oxide cathodes; nickel-rich oxides; Li2ZrO3 surface coating; full cells; long-term cyclability
资金
- Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy (DOE) [DE-EE0006447]
- Welch Foundation [F-1254]
As nickel-rich layered oxide cathodes start to attract worldwide interest for the next-generation lithium-ion batteries, their long-term cyclability in full cells remains a challenge for electric vehicles. Here we report a long-life Nirich layered oxide cathode (LiNi0.7Co0.15Mn0.15O2) with a uniform surface coating of the cathode particles with Li2ZrO3. A pouch-type full cell fabricated with the Li(2)ZrO(3)coated cathode and a graphite anode displays 73.3% capacity retention after 1500 cycles at a C/3 rate. The Li2ZrO3 coating has been optimized by a systematic study with different synthesis approaches, annealing temperatures, and coating amounts. The complex relationship among the coating conditions, uniformity, and morphology of the coating layer and their impacts on the electrochemical properties are discussed in detail.
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