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

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

机构地区：[1]Institute of Energy Materials and Electrochemistry Research,University of Science and Technology Liaoning,Anshan 114051,Liaoning,China [2]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,Liaoning,China [3]School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,Liaoning,China [4]Shenyang King Power Tech.Co.,Ltd.,Shenyang 110016,Liaoning,China [5]School of Chemical Engineering,The University of New South Wales,Sydney 2052,NSW,Australia

出　　处：《Journal of Energy Chemistry》2024年第7期449-457,共9页能源化学（英文版）

基　　金：the financial support from the National Natural Science Foundation of China(51972156,52072378,52102054 and 51927803);the National Key R&D Program of China(2022YFB3803400,2021YFB3800301);the Shenyang Science and Technology Program(22-322-3-19);the Youth Fund of the Education Department of Liaoning Province(LJKQZ20222324);the Outstanding Youth Fund of University of Science and Technology Liaoning(2023YQ11).

摘　　要：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(below0°C and above 50 °C).Here,we report the design of F/Mo co-doped LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(FMNCM)cathode for high-performance LIBs from-20 to 60°C.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 Mo^(6+) doping suppresses phase transition,which blocks Li^(+)/Ni^(2+) 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°C,maintaining 90.6%capacity retention at 3 C after 150 cycles.Additionally,at temperatures as low as-20°C,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 temperatureadaptability.

关 键 词：Anion-cation co-doping Wide temperature operation Ni-richlayered cathode Phase transition Surface/interface 

分 类 号：TM912[电气工程—电力电子与电力传动] O646[理学—物理化学]