文献类型：期刊文献

英文题名：Hierarchical NiCo2Se4 nanoneedles/nanosheets with N-doped 3D porous graphene architecture as free-standing anode for superior sodium ion batteries

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

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

年份：2021

卷号：587

起止页码：260

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20205209695234);WOS:【SCI-EXPANDED(收录号:WOS:000615743900009)】；

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：Chemical vapor deposition; Three-dimensional N-doped graphene; NiCo2Se4

摘要：In order to cope with the problem of insufficient lithium metal reserves, sodium ion batteries (SIBs) are proposed and extensively studied for the next-generation batteries. In our work, hierarchical NiCo2Se4 nanoneedles/nanosheets are deposited on the skeleton of N-doped three dimensional porous graphene (NPG) by a convenient solvothermal method and subsequent gas-phase selenization process. Compared with NiCo2Se4 powder, the optimized NiCo2Se4/N-doped porous graphene composite (denoted as NCS@NPG) as self-supporting anode exhibits the excellent electrode activity for SIBs, with a specific capacity of 500 mAh/g and 257 mAh/g at a current density of 0.2 A/g and 6.4 A/g, respectively. The high specific capacity as well as rate capacity can be attributed to the three-dimensional graphene skeleton with high electrical conductivity and pore structure, which provides convenient ion and electron transmission channels. (c) 2020 Elsevier Inc. All rights reserved.