N-doped carbon encapsulated CoMoO4 nanorods as long-cycle life anode for sodium-ion batteries.
作者:Huang, Xiaoqing; Zhang, Wenbiao; Zhou, Chaojin; Yang, Lichun; Wang, Hui; Gao, Qingsheng; Zhu, Min
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Journal of colloid and interface science
卷:576 页:176-185
DOI:10.1016/j.jcis.2020.05.017
出版年: 2020-May-08 (Epub 2020 May 08)
文献类型:Journal Article
摘要
Volume expansion and poor conductivity result in poor cyclability and low rate capability, which are the major challenges of transition-metal oxide as anode materials for sodium-ion batteries (SIBs). Herein, N-doped carbon encapsulated CoMoO4 (CoMoO4@NC) nanorods are developed as excellent anode materials for SIBs with long-cycle life. The N-doped carbon shells serve as buffer to accommodate severe volume changes during sodiation/desodiation, and at the same time improve electronic conductivity and activate surface sites of CoMoO4. The optimized composite presents rapid reaction kinetics and excellent cycle stability. Even at a high current density of 1 A g-1, it still shows long-cycle life and maintains specific capacity of 190 mAh g-1 after 3200 cycles. Furthermore, CoMoO4@NC anode is applied to match with Na3V2(PO4)3 cathode to assemble full-cells, in which it accomplishes reversible capacity of 152 mAh g-1 after 100 cycles, with capacity retention of 75% at a current density of 1 A g-1, highlighting the practical application for SIBs.
Copyright © 2020 Elsevier Inc. All rights reserved.
关键词
关键词列表:Anode materials; Long-cycle life; Mixed transition-metal oxides; N-doped carbon; Sodium-ion batteries
作者信息
地址:Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, PR China.
School of Materials Science and Engineering, and Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou 510640, PR China.
School of Materials Science and Engineering, and Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou 510640, PR China. Electronic address: mslcyang@scut.edu.cn.
Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, PR China. Electronic address: tqsgao@jnu.edu.cn.