中国化学快报(英文版)2024，Vol.35Issue(5) ：499-503.DOI:10.1016/j.cclet.2023.108638

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

Mingjiao Lu Zhixing Wang Gui Luo Huajun Guo Xinhai Li Guochun Yan Qihou Li Xianglin Li Ding Wang Jiexi Wang
中国化学快报(英文版)2024，Vol.35Issue(5) ：499-503.DOI:10.1016/j.cclet.2023.108638
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Boosting the performance of LiNi0.90Co0.06Mn0.04O2 electrode by uniform Li3PO4 coating via atomic layer deposition

Mingjiao Lu 1Zhixing Wang 2Gui Luo 3Huajun Guo 2Xinhai Li 2Guochun Yan 4Qihou Li 1Xianglin Li 5Ding Wang 6Jiexi Wang2
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作者信息

  • 1. School of Metallurgy and Environment,Central South University,Changsha 410083,China
  • 2. 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
  • 3. BASF ShanShan Battery Materials Co.,Ltd.,Changsha 410006,China
  • 4. School of Metallurgy and Environment,Central South University,Changsha 410083,China;Hunan Provincial Key Laboratory of Nonferrous Value-Added Metallurgy,Central South University,Changsha 410083,China
  • 5. School of Physics and Chemistry,Hunan First Normal University,Changsha 410205,China
  • 6. 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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Abstract

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.

Key words

Ultra-high nickel material/LiNi0.90Co0.06Mn0.04O2/Atomic layer deposition/Li3PO4/Ionic conductor

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基金项目

国家自然科学基金(52174285)

Science and Technology Innovation Program of Hunan Province(2022RC3048)

云南省重点研发计划(202103AA080019)

Research Foundation of Education Bureau of Hunan Province(18B477)

出版年

2024
中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCDCSCD
影响因子：0.771
ISSN：1001-8417
参考文献量44
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