Nitrogen-doped carbon stabilized Li Fe0.5Mn0.5PO4/rGO cathode materials for high-power Li-ion batteries

作     者：Haifeng Yu Zhaofeng Yang Huawei Zhu Hao Jiang Chunzhong Li Haifeng Yu;Zhaofeng Yang;Huawei Zhu;Hao Jiang;Chunzhong Li

作者机构：Key Laboratory for Ultrafine Materials of Ministry of EducationSchool of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2020年第28卷第7期

页      面：1935-1940页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

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) 

主　　题：Cathode materials High power density Carbon Long cycle life Li-ion batteries 

摘      要：Exploring high ion/electron conductive olivine-type transition metal phosphates is of vital significance to broaden their applicability in rapid-charging ***,we report an interface engineered Li Fe0.5Mn0.5PO4/rGO@C cathode material by the synergistic effects of r GO and polydopamine-derived N-doped *** well-distributed Li Fe0.5Mn0.5PO4nanoparticles are tightly anchored on r GO nanosheet benefited by the coating of N-doped carbon *** design of such an architecture can effectively suppress the agglomeration of nanoparticles with a shortened Li+transfer ***,the high-speed conducting network has been constructed by r GO and N-doped carbon,which exhibits the face-to-face contact with Li Fe0.5Mn0.5PO4nanoparticles,guaranteeing the rapid electron *** profits endow the Li Fe0.5Mn0.5PO4/rGO@C hybrids with a fast charge-discharge ability,e.g.a high reversible capacity of 105 m Ah·g^-1at 10 C,much higher than that of the Li Fe0.5Mn0.5PO4@C nanoparticles(46 mA·h·g^-1).Furthermore,a 90.8%capacity retention can be obtained even after cycling 500 times at 2 *** work gives a new avenue to fabricate transition metal phosphate with superior electrochemical performance for high-power Li-ion batteries.