Facile synthesis of spinel LiNi_(0.5)Mn_(1.5)O_(4) as 5.0 V-class high-voltage cathode materials for Li-ion batteries

作     者：Xueyi Guo Chenlin Yang Jinxiu Chen Qinghua Tian Hongmei Zhang Guoyong Huang Xueyi Guo;Chenlin Yang;Jinxiu Chen;Qinghua Tian;Hongmei Zhang;Guoyong Huang

作者机构：School of Metallurgy and EnvironmentCentral South UniversityChangsha 410083China College of New Energy and MaterialsChina University of Petroleum-BeijingBeijing 102249China State Key Laboratory of Heavy Oil ProcessingCollege of Chemical EngineeringChina University of Petroleum-BeijingBeijing 102249China State Key Laboratory of Advanced Chemical Poer SourcesGuizhou Meiling Power Sources Co.Ltd.Zunyi 563003China 

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

年 卷 期：2021年第34卷第11期

页      面：247-254页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 

基　　金：the National Natural Science Foundation of China(52022109 and 51834008) Beijing Municipal Natural Science Foundation(2202047) Science Foundation of China University of Petroleum,Beijing(2462018YJRC041 and 2462020YXZZ016) the Opening Project of State Key Laboratory of Advanced Chemical Power Sources(SKL-ACPS-C-20) 

主　　题：LiMn_(2)O_(4) LiNi_(0.5)Mn_(1.5)O_(4) Novel morphology Li-ion battery Electrochemistry Preparation Nanomaterials 

摘      要：LiNi_(0.5)Mn_(1.5)O_(4) and LiMn_(2)O_(4) with novel spinel morphology were synthesized by a hydrothermal and postcalcination *** synthesized LiMn_(2)O_(4) particles(5–10 lm)are uniform hexahedron,while the LiNi_(0.5)Mn_(1.5)O_(4) has spindle-like morphology with the long axis 10–15 lm,short axis 5–8 *** LiMn_(2)O_(4) and LiNi_(0.5)Mn_(1.5)O_(4) show high capacity when used as cathode materials for Li-ion *** the voltage range of 2.5–5.5 V at room temperature,the LiNi_(0.5)Mn_(1.5)O_(4) has a high discharge capacity of 135.04 mA·h·g^(-1) at 20 mA
g^(-1),which is close to 147 mA·h·g^(-1)(theoretical capacity of LiNi_(0.5)Mn_(1.5)O_(4)).The discharge capacity of LiMn_(2)O_(4) is 131.08 mA·h·g^(-1) at 20 mA
g^(-1).Moreover,the LiNi_(0.5)Mn_(1.5)O_(4) shows a higher capacity retention(76%)compared to that of LiMn_(2)O_(4)(61%)after 50 *** morphology and structure of LiMn_(2)O_(4) and LiNi_(0.5)Mn_(1.5)O_(4) are well kept even after cycling as demonstrated by SEM and XRD on cycled LiMn_(2)O_(4) and LiNi_(0.5)Mn_(1.5)O_(4) electrodes.