首页|Regulating interfacial chemistry and kinetic behaviors of F/Mo co-doping Ni-rich layered oxide cathode for long-cycling lithium-ion batteries over-20 ℃-60 ℃

Regulating interfacial chemistry and kinetic behaviors of F/Mo co-doping Ni-rich layered oxide cathode for long-cycling lithium-ion batteries over-20 ℃-60 ℃

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Ni-rich layered oxide cathodes have shown promise for high-energy lithium-ion batteries(LIBs)but are usually limited to mild environments because of their rapid performance degradation under extreme temperature conditions(below 0 ℃ and above 50 ℃).Here,we report the design of F/Mo co-doped LiNi0.8Co0.1Mn0.1O2(FMNCM)cathode for high-performance LIBs from-20 to 60 ℃.F-doping with high electronegativity into the cathode surface is found to enhance the stability of surface lattice structure and protect the interface from side reactions with the electrolyte by generating a LiF-rich surface layer.Concurrently,the Mo6+doping suppresses phase transition,which blocks Li+/Ni2+mixing,and stabilizes lithium-ion diffusion pathway.Remarkably,the FMNCM cathode demonstrates excellent cycling stability at a high cutoff voltage of 4.4 V,even at 60 ℃,maintaining 90.6％capacity retention at 3 C after 150 cycles.Additionally,at temperatures as low as-20 ℃,it retains 77.1％of its room temperature capacity,achieving an impressive 97.5％capacity retention after 500 cycles.Such stable operation under wide temperatures has been further validated in practical Ah-level pouch-cells.This study sheds light on both fundamental mechanisms and practical implications for the design of advanced cathode materials for wide-temperature LIBs,presenting a promising path towards high-energy and long-cycling LIBs with temperature adaptability.

Anion-cation co-dopingWide temperature operationNi-rich layered cathodePhase transitionSurface/interface

Siqi Guan、Lin Tao、Pei Tang、Ruopian Fang、Huize Wu、Nan Piao、Huicong Yang、Guangjian Hu、Xin Geng、Lixiang Li、Baigang An、Feng Li

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Institute of Energy Materials and Electrochemistry Research,University of Science and Technology Liaoning,Anshan 114051,Liaoning,China

Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,Liaoning,China

School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,Liaoning,China

School of Chemical Engineering,The University of New South Wales,Sydney 2052,NSW,Australia

Shenyang King Power Tech.Co.,Ltd.,Shenyang 110016,Liaoning,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Key R&D Program of ChinaNational Key R&D Program of ChinaShenyang Science and Technology ProgramYouth Fund of the Education Department of Liaoning ProvinceOutstanding Youth Fund of University of Science and Technology Liaoning

519721565207237852102054519278032022YFB38034002021YFB380030122-322-3-19LJKQZ202223242023YQ11

2024

10.1016/j.jechem.2024.02.064

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.94(7)