Publication Date

2-1-2018

Department

Ames Laboratory

Campus Units

Ames Laboratory

Report Number

IS-J 9603

DOI

10.1021/acs.jpcc.7b11125

Journal Title

Journal of Physical Chemistry C

Volume Number

122

Issue Number

4

First Page

2002

Last Page

2011

Abstract

The developments of electrode active materials provide the opportunities for next-generation energy storage devices. The arrangement of electrode materials on the substrate has recently emerged as a promising strategy for preparing high-performance supercapacitors. Herein, we demonstrate a novel vertically aligned CuSe@Co(OH)(2) nanosheet arrays electrode for supercapacitor application. The materials are thoroughly characterized by structural and spectroscopic techniques. Electrochemical performance of CuSe@Co(OH)(2) nanosheet arrays are investigated in detail, which exhibit a specific capacitance as much as 1180 F g(-1) at a current density of 1 A g(-1). A flexible asymmetric all-solid-state supercapacitor is fabricated using CuSe@Co(OH)(2) nanosheet arrays as the positive electrode and activated carbon as the negative electrode. The device delivers a volumetric capacitance of 441.4 mF cm(-3) with maximum energy density and maximum power density is 0.17 and 62.1 mW cm(-3), as well as robust cycling stability (similar to 80.4% capacitance retention after 10 000 cycles), excellent flexibility, and mechanical stability. The excellent electrochemical performance can be attributed to its unique vertically aligned configuration.

DOE Contract Number(s)

AC02-07CH11358

Language

en

Department of Energy Subject Categories

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE

Available for download on Friday, January 04, 2019

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