Co(OH)F nanorods@K x MnO2 nanosheet core-shell structured arrays for pseudocapacitor application

Si Chen; Yi Song; Xuejiao Zhou; Mingyi Zhang

doi:10.1039/c9ra07024a

Co(OH)F nanorods@K _x MnO₂ nanosheet core-shell structured arrays for pseudocapacitor application

RSC Adv. 2019 Nov 6;9(62):36208-36212. doi: 10.1039/c9ra07024a. eCollection 2019 Nov 4.

Authors

Si Chen¹, Yi Song², Xuejiao Zhou¹, Mingyi Zhang¹

Affiliations

¹ Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University Harbin 150025 PR China zhangmingyi@hrbnu.edu.cn mysci@foxmail.com.
² Institute of Data Science and Artificial Intelligenc, Harbin Huade University Harbin 150025 PR China.

Abstract

In this work, Co(OH)F nanorods@K _x MnO₂ nanosheet core-shell nanostructure was assembled on Ni foam by a facile hydrothermal method and incorporated with an electrodeposition process. Benefiting from their core-shell nanostructure and heterogeneous nanocomposites, the arrays present high areal capacitance up to 1046 mF cm^-2 at 1 mA cm^-2 and display a remarkable specific capacitance retention of 118% after 3000 cycles. When the current density increases to 10 mA cm^-2, the capacitance is 821 mF cm^-2 displaying a good rate capability. The excellent electrochemical properties allow them to be used as a promising electrode material for pseudocapacitors and display wide application potential in the field of electrochemical capacitors.