Energy-Saving Synthesis of MOF-Derived Hierarchical and Hollow Co(VO3)2-Co(OH)2 Composite Leaf Arrays for Supercapacitor Electrode Materials

Yingxi Zhang; Hao Chen; Cao Guan; Yatao Wu; Chunhai Yang; Zhehong Shen; Qichao Zou

doi:10.1021/acsami.8b05501

Energy-Saving Synthesis of MOF-Derived Hierarchical and Hollow Co(VO₃)₂-Co(OH)₂ Composite Leaf Arrays for Supercapacitor Electrode Materials

ACS Appl Mater Interfaces. 2018 Jun 6;10(22):18440-18444. doi: 10.1021/acsami.8b05501. Epub 2018 May 25.

Authors

Yingxi Zhang^{1

2}, Hao Chen^{2

3}, Cao Guan³, Yatao Wu², Chunhai Yang⁴, Zhehong Shen², Qichao Zou¹

Affiliations

¹ College of Chemistry and Chemical Engineering , Hubei University , Wuhan 430062 , PR China.
² School of Engineering , Zhejiang A&F University , Hangzhou 311300 , PR China.
³ Department of Materials Science and Engineering , National University of Singapore , 117574 Singapore.
⁴ School of Chemistry & Environment Engineering , Hubei University for Nationalities , Enshi 445000 , PR China.

PMID: 29790730
DOI: 10.1021/acsami.8b05501

Abstract

A one-step and energy-saving method was proposed to synthesize hierarchical and hollow Co(VO₃)₂-Co(OH)₂ composite leaf arrays on carbon cloth, which expressed high capacitance (522 mF cm^-2 or 803 F g^-1 at the current density of 0.5 mA cm^-2), good rate capability (79.5% capacitance retention after a 30-fold increase of the current density) and excellent cycling stability (90% capacitance retention after 15 000 charge-discharge cycles) when tested as a supercapacitor electrode.

Keywords: electrode materials; exchange reactions; hollow arrays; metal−organic frameworks; supercapacitors.