Potential use of magnesium industrial waste for synthesis of Li and Mg co-doped LiMn_(2)O_(4)nanoparticles as cathode material for Li-ion batteries:Effect of sintering temperature  

作　　者：Aleksei Llusco Luis Rojas Svetlana Ushak Mario Grageda 

机构地区：[1]Department of Chemical Engineering and Mineral Processing and Center for Advanced Study of Lithium and Industrial Minerals(CELiMIN),Universidad de Antofagasta,Antofagasta 1270300,Chile

出　　处：《Nano Research》2022年第5期4500-4516,共17页纳米研究（英文版）

基　　金：Research presented in this article was funded by Programa Formacion de Capital Humano Avanzado from Comision Nacional de Investigación Cientifica and Tecnológica(No.CONICYT-PCHA/DoctoradoNacional/2015-21151464);Fondo de Financiamiento de Centros de Investigación enÁreas Prioritarias(No.ANID/FONDAP/15110019);Fondo Nacional de Desarrollo Cientifico and Tecnologico(No.FONDECYT REGULAR N°1191347);Programa Ingenieria 2030 from Corporación de Fomento de la Produccion(No.ING2030 CORFO 16ENI2-71940).

摘　　要：Potential advantages of active electrode nanomaterials have led to development of high energy and power density lithium-ion(Li-ion)batteries.However,under increasing demand for critical resources such as lithium and cobalt,it is necessary to use abundant raw materials,which can be obtained from industrial waste.In this work,purified Mg(OH)_(2)from waste generated in the production of Li2CO3 with natural brines from the Salar de Atacama(Chile)is used as a doping agent for synthesis of LiMn_(2)O_(4)(LMO)spinel octahedral nanoparticles co-doped with excess Li and Mg.Crystallization of a pure cubic spinel phase(Fd3m)takes place at 500℃and sintering temperature effect at 580 and 750℃,thus the elemental composition and the structural,morphological,and electrochemical properties are studied in detail.Optimum electrochemical performance at room temperature is obtained for Li_(1.03)Mg_(0.05)Mn_(1.92)O_(4)spinel sintered at 750℃with an initial discharge capacity of 121.3 mAh·g^(-1)and capacity retention of 94.0%after 100 cycles at C/3.A locally ordered spinel structure is obtained at 750℃,and doping with Mg^(2+)improves structural rigidity.Synergy between both effects resulted in a high Li^(+)diffusion rate(1.29×10^(-9)cm^(2)·s^(-1))significantly improving cycling performance at elevated C-rates in 50℃.

关 键 词：LiMn_(2)O_(4)(LMO)spinel Mg doped excess Li octahedral nanoparticle industrial waste lithium-ion(Li-ion)batteries 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383[一般工业技术—材料科学与工程]