文献类型：期刊文献

英文题名：Hierarchical Co 2 VO 4 yolk-shell microspheres con fi ned by N-doped carbon layer as anode for high-rate lithium-ion batteries

作者：Liu, Jinzhe[1];Zhang, Peilin[1];Yu, Di[1];Li, Kuang[1];Wu, Jing[1];Wang, Weiwei[1];Zhou, Chencheng[1];Zhou, Jiaojiao[1];Lei, Yuchen[1];Chen, Luyang[1]

机构：[1]East China Univ Sci & Technol, Key Lab Ultrafine Mat, Sch Mat Sci & Engn, Minist Educ, Shanghai 200237, Peoples R China

年份：2021

卷号：882

外文期刊名：JOURNAL OF ELECTROANALYTICAL CHEMISTRY

收录：;EI(收录号：20210509851665);WOS:【SCI-EXPANDED(收录号:WOS:000626266900007)】；

基金：This work was supported by the National Natural Science Foundation of China (51502092), the Fundamental Research Funds for the Central Universities (222201718002), the Thousand Talents Program Young Project in China, and the Program for Eastern Scholar at Shanghai Institutions of Higher Learning (TP2015028).

语种：英文

外文关键词：Co2VO4; Nitrogen-doped carbon coating; Yolk-shell structure; Lithium ion batteries

摘要：The design of high-performance anodes is crucial for the whole for lithium-ion batteries (LIBs). Binary transition metal oxides (bi-TMOs), especially cobalt vanadates featuring high theoretical lithium storage capacity endow them promising anode materials. However, low electric conductivity as well as tremendous volume change occurring during the process of de-/lithiation restrict their commercialization. Herein, the as-devised novel spinel Co2VO4 yolk-shell microspheres coated with nitrogen-doped carbon shell (Co2VO4@NC) were synthesized by the method of a selftemplated solvothermal preparation and following in-situ pyrolysis of polydopamine (PDA) film, which demonstrates excellent properties as anode for LIBs by virtue of the unique spinel structural characteristics, mixed lithium storage mechanism, micro/nanolization of the yolk-shell structure and vital amorphous NC component. In detail, the unique Co2VO4@NC electrode displays the high Li ion storage capacity (1255 mAh g(-1) at 0.2 A g(-1)), the superior cycling stability (1227 mAh g(-1) at 0.5 A g(-1) after 400 cycles) as well as outstanding reversible capability (remaining 862 mAh g(-1) when return to 0.1 A g(-1) from 5 A g(-1), larger than initial 796 mAh g(-1)).