Decoding Li^(+)/H^(+)ion exchange route toward low-temperature synthesis of layered oxide cathode materials for lithium-ion batteries

作     者：Pei-Yao Li Ying-De Huang Yu-Hong Luo Han-Xin Wei Rui Luo Lin-Bo Tang He-Zhang Chen Xia-Hui Zhang Jun-Chao Zheng Pei-Yao Li;Ying-De Huang;Yu-Hong Luo;Han-Xin Wei;Rui Luo;Lin-Bo Tang;He-Zhang Chen;Xia-Hui Zhang;Jun-Chao Zheng

作者机构：School of Metallurgy and EnvironmentCentral South UniversityChangsha410083China School of Chemistry and Chemical EngineeringHunan University of Science and TechnologyXiangtan411201China 

出 版 物：《Rare Metals》 (稀有金属(英文版))

年 卷 期：2024年第43卷第12期

页      面：6329-6339页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially supported by the National Natural Science Foundation of China(No.51974368) supported by the Beamlines MCD-A and MCD-B(Soochow Beamline for Energy Materials)at NSRL 

主　　题：Lithium-ion battery Cathode materials Ion exchange 

摘      要：The synthesis of layered oxide cathode materials by the traditional high-temperature ceramic method usually requires calcination and annealing at temperatures in the range of 700-1000℃,with high energy consumption and serious cation mixing ***,we present a novel hydrothermalLi^(+)/H^(+)exchange method for the preparation of layered oxide cathodes at temperatures as low as 200℃.In contrast to the widely reported Li^(+)/Na^(+)exchange method using sodium-containing:precursors,layered oxide cathodes can be directly synthesized by hydrothermal reaction between commercial hydroxide precursors and LiOH·*** reaction pathway consists of two steps.(1)The hydroxyl oxide intermediate is obtained by oxidizing the hydroxide precursor.(2)The layered oxide product is obtained by theLi^(+)/H^(+)exchange reaction of the hydroxyl oxide with Li+in *** studying the time-resolved structural evolution,we reveal that the mechanism of material formation duringLi^(+)/H^(+)ion exchange is in situ crystallization,and the ion exchange process is accompanied by lattice distortion caused by internal diffusion of *** findings not only provide valuable insights into theLi^(+)/H^(+)exchange process,but also provide a new paradigm for the lowtemperature synthesis of advanced cathode materials.