The effect of B2O3 modification on the electrochemical properties of LiCoO2 cathode

doi:10.19799/j.cnki.2095-4239.2021.0685

Abstract

Abstract:

Lithium cobalt oxide is widely employed in different consumer electronic products due to its high energy density, rate performance, and thermal stability. With the advancement of artificial intelligence and 5G communication technology. A higher energy density of LiCoO₂ (LCO) batteries is required. In this study, lithium cobalt oxide was coated with B₂O₃ using the simple solid-state approach. The resistance of B₂O₃modified LiCoO₂ (BLCO) was much lower than the pristine LiCoO₂ (LCO). The discharge capacity of BLCO at 3-4.55 V and room temperature reach 201.2 mAh/g, which was greater than 192.64 mAh/g of the pure LCO. The capacity retention of BLCO after 500 cycles was 194.8 mAh/g, which was higher than 184.37 mAh/g of the pristine LCO. This enhancement can be attributed to the higher electronic conductivity and smaller interface impedance of BLCO. Our research provides a method to enhance the capacity of lithium cobalt oxide. The failure mechanism of lithium cobalt oxide material cycled at high voltage was also investigated, which will be helpful for the design of high voltage lithium cobalt oxide in the future.

Key words: lithium battery, LiCoO₂, coating, B₂O₃, high voltage

CLC Number:

TM 911

WU Yida, ZHANG Yi, ZHAN Yuanjie, GUO Yaqi, ZHANG liao, LIU Xingjiang, YU Hailong, ZHAO Wenwu, HUANG Xuejie. The effect of B₂O₃ modification on the electrochemical properties of LiCoO₂ cathode[J]. Energy Storage Science and Technology, 2022, 11(6): 1687-1692.

Figures/Tables 7

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References 26

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测试类型		LCO	BLCO
激光粒度/μm	D10	4.76	4.86
	D50	13.80	13.63
	D90	28.37	26.20
	Dmax	41.63	36.73
粉体电阻率(2MPa)/(kΩ/cm)		512.591	32.1538
振实密度/(g/cm³)		3.09	3.02

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The effect of B₂O₃ modification on the electrochemical properties of LiCoO₂ cathode

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