首页|Boosting the performance of LiNi0.90Co0.06Mn0.04O2 electrode by uniform Li3PO4 coating via atomic layer deposition

Boosting the performance of LiNi0.90Co0.06Mn0.04O2 electrode by uniform Li3PO4 coating via atomic layer deposition

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Ultra-high nickel material is considered to be a promising cathode material.However,with the increase of nickel content,the interfacial side reactions between the cathode and electrolyte become increas-ingly serious.Herein,an atomically controllable ionic conductor Li3PO4(LPO)coating is deposited on the LiNi0.90Co0.06Mn0.04O2(NCM9064)based electrode by the atomic layer deposition method.The results shows that the LPO coating is uniformly and densely covered on the surface of secondary particles of NCM9064,helping to prevent the direct contact between the electrolyte and cathode during the charging-discharging process.In addition,the coating layer is electrochemically stable.As a result,the interfacial side reactions during the long cycle are effectively suppressed,and the solid electrolyte interphase layer at the interface is stabilized.The electrode with 20 layers of LPO deposition(ALD-LPO-20)exhibits an excellent capacity retention of 81％after 200 cycles in 2.8-4.3 V at 25 ℃,which is 18％higher than the unmodified material(ALD-LPO-0).Besides,the moderate LPO coating improves the rate capability and high temperature cycling performance of NCM9064.This study provides a method for the modification of ultra-high nickel cathode materials and corresponding electrodes.

Ultra-high nickel materialLiNi0.90Co0.06Mn0.04O2Atomic layer depositionLi3PO4Ionic conductor

Mingjiao Lu、Zhixing Wang、Gui Luo、Huajun Guo、Xinhai Li、Guochun Yan、Qihou Li、Xianglin Li、Ding Wang、Jiexi Wang

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School of Metallurgy and Environment,Central South University,Changsha 410083,China

Engineering Research Center of the Ministry of Education for Advanced Battery Materials,Central South University,Changsha 410083,China

Hunan Provincial Key Laboratory of Nonferrous Value-Added Metallurgy,Central South University,Changsha 410083,China

BASF ShanShan Battery Materials Co.,Ltd.,Changsha 410006,China

School of Physics and Chemistry,Hunan First Normal University,Changsha 410205,China

National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology,Key Laboratory of Advanced Battery Materials of Yunnan Province,Faculty of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China

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国家自然科学基金Science and Technology Innovation Program of Hunan Province云南省重点研发计划Research Foundation of Education Bureau of Hunan Province

521742852022RC3048202103AA08001918B477

2024

10.1016/j.cclet.2023.108638

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(5)
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