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Bimetallic ZIF–derived polyhedron ZnCo2O4 anchored on the reduced graphene oxide as an anode for sodium-ion battery

Authors
  • Yang, Xing1
  • Wang, Peng1
  • Tang, Yiwei2
  • Peng, Can2
  • Lai, Yanqing1
  • Li, Jie1
  • Zhang, Zhian1
  • 1 Central South University, School of Metallurgy and Environment, Changsha, Hunan, 410083, China , Changsha (China)
  • 2 Guangdong Jiana Energy Technology Co., Ltd., Qingyuan, 511500, China , Qingyuan (China)
Type
Published Article
Journal
Ionics
Publisher
Springer Berlin Heidelberg
Publication Date
Apr 08, 2019
Volume
25
Issue
6
Pages
2945–2950
Identifiers
DOI: 10.1007/s11581-019-02982-x
Source
Springer Nature
Keywords
License
Yellow

Abstract

Polyhedron ZnCo2O4 derived from the appropriate oxidation of bimetallic ZIF (Co2/3·Zn1/3(MeIm)2) is anchored on the reduced graphene oxide (rGO) nanosheets via a hydrothermal method. ZnCo2O4 is uniformly distributed in the structure of polyhedron and the polyhedron ZnCo2O4 firmly is decorated on the rGO nanosheets according to the results of element mapping and scanning electron microscope (SEM). With a discharge/charge voltage from 0.01 to 3.0 V, the polyhedron [email protected] composite electrode displays good cycling performance with a discharge capacity of 134 mA h g−1 after 300 cycles for sodium-ion batteries, which is better than polyhedron ZnCo2O4. Good cycling performance and high reversible capacity can be ascribed to benign conductive environment and flexible supporting of reduced graphene oxide.

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