文献类型：期刊文献

中文题名：Lithium-conductive LiNbO_(3) coated high-voltage LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2) cathode with enhanced rate and cyclability

作者：Haifeng Yu[1];Shouliang Wang[1];Yanjie Hu[1];Guanjie He[2];Le Quoc Bao[3];Ivan P.Parkin[2];Hao Jiang[1]

机构：[1]Key Laboratory for Ultrafine Materials of Ministry of Education,Shanghai Engineering Research Center of Hierarchical Nanomaterials,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;[2]Christopher Ingold Laboratory,Department of Chemistry,University College London,20 Gordon Street,London,WC1H 0AJ,UK;[3]Faculty of Applied Sciences,Ton Duc Thang University,19 Nguyen Huu Tho,District 7,Ho Chi Minh City,Viet Nam

年份：2022

卷号：7

期号：2

起止页码：266

中文期刊名：Green Energy & Environment

外文期刊名：绿色能源与环境（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2021_2022】；

基金：supported by the National Natural Science Foundation of China(21975074,91534202,and 91834301);the Shanghai Scientific and Technological Innovation Project(18JC1410500);the Fundamental Research Funds for the Central Universities(222201718002)。

语种：英文

中文关键词：coating;exceptional;Lithium;

摘要：LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)(NCM523) cathode materials can operate at extremely high voltages and have exceptional energy density.However,their use is limited by inherent structure instability during charge/discharge and exceptionally oxidizing Ni^(4+)at the surface.Herein,we have developed a citrate-assisted deposition concept to achieve a uniform lithium-conductive LiNbO_(3) coating layer on the NCM523 surface that avoids self-nucleation of Nb-contained compounds in solution reaction.The electrode-electrolyte interface is therefore stabilized by physically blocking the detrimental parasitic reactions and Ni^(4+)dissolution whilst still maintaining high Li+conductivity.Consequently,the modified NCM523 exhibits an encouraging Li-storage specific capacity of 207.4 m Ah g-1at 0.2 C and 128.9 m Ah g-1 at 10 C over the range 3.0-4.5 V.Additionally,a 92% capacity retention was obtained after 100 cycles at 1 C,much higher than that of the pristine NCM523(73%).This surface engineering strategy can be extended to modify other Ni-rich cathode materials with durable electrochemical performances.