文献类型：期刊文献

中文题名：Complementary dual-doping of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)cathode enhances ion-diffusion and stability for Li-ion batteries

作者：Zhihong Wang[1,3];Huawei Zhu[1];Haifeng Yu[1];Tao Zhang[3];Yanjie Hu[1,2];Hao Jiang[1,2];Chunzhong Li[1,2]

机构：[1]Shanghai Engineering Research Center of Hierarchical Nanomaterials,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;[2]Key Laboratory for Ultrafine Materials of Ministry of Education,School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;[3]State Key Lab of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China

年份：2023

卷号：34

期号：6

起止页码：577

中文期刊名：Chinese Chemical Letters

外文期刊名：中国化学快报（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2023_2024】；PubMed;

基金：supported by the National Natural Science Foundation of China(Nos.21975074,91834301);the Innovation Program of Shanghai Municipal Education Commission;the Fundamental Research Funds for the Central Universities。

语种：英文

中文关键词：LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2);Dual-doping;High power;Cycling stability;Li-ion batteries

摘要：The Ni-richLiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)layered cathodes endow Li-ion batteries(LIBs)with high energy density.However,they usually suffer from limited ion-diffusion and structural instability during cycling.Although doping strategy can effectively alleviate these issues,the coupling effects of multi-element doping and the corresponding performance enhancement mechanism have been yet unclear.Here,we report a Zr/Ti dual-doped NCM811 cathode material(ZT-NCM811),in which Zr-ion is doped into both transition metal(TM)layers and lithium layers and Ti-ion is only distributed in TM layers.The dual-doping can effectively enhance crystal structure stability via inhibiting the lattice collapse along c-axis and decreasing the Li/Ni disorder.Meantime,the lattice oxygen escape is also greatly reduced due to the presence of stronger Zr-O and Ti-O bonds,further mitigating the crystal surface parasitic reactions with electrolyte.The resultant ZT-NCM811 exhibits high specific capacity of 124 m Ah/g at even 10 C,much higher than undoped and single-doped NCM811,and a retention of 98.8%at 1 C after 100 cycles.The assembled ZT-NCM811/graphite full cell also delivers superior battery performances and durability.