Hierarchical WO3@MnWO4 core-shell structure for asymmetric supercapacitor with ultrahigh cycling performance at low temperature

Shunyu Yao; Lei Xing; Yidi Dong; Xiang Wu

doi:10.1016/j.jcis.2018.07.055

Hierarchical WO₃@MnWO₄ core-shell structure for asymmetric supercapacitor with ultrahigh cycling performance at low temperature

J Colloid Interface Sci. 2018 Dec 1:531:216-224. doi: 10.1016/j.jcis.2018.07.055. Epub 2018 Jul 19.

Authors

Shunyu Yao¹, Lei Xing², Yidi Dong², Xiang Wu³

Affiliations

¹ School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China; College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, China.
² School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China.
³ School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China. Electronic address: wuxiang05@sut.edu.cn.

PMID: 30032008
DOI: 10.1016/j.jcis.2018.07.055

Abstract

In this work, for the first time we report a kind of novel WO₃@MnWO₄ core-shell structure prepared by a facile and cost-effective solution route. The core-shell structure consists of WO₃ nanowire array as the core and MnWO₄ nanosheets as the shell. The as-synthesized hybrid structures as the supercapacitor negative electrodes possess remarkably enhanced specific capacitance. By matching with MnO₂ nanosheets as the positive electrode, a 2 V voltage asymmetric supercapacitor is assembled, which reveals an excellent rate capability with 92.11% capacity retention after 10,000 cycles. In addition, the as-obtained ASC presents outstanding cycling performance after 10,000 cycles at the working temperature of 3 °C.

Keywords: Asymmetrical supercapacitors; Core-shell structure; Cycling performance; Electrochemical performance; MnWO(4); WO(3).