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Title: High-Performance Flexible All-Solid-State Asymmetric Supercapacitors Based on Vertically Aligned CuSe@Co(OH) 2 Nanosheet Arrays

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. In this paper, 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 (~80.4% capacitance retention after 10 000 cycles), excellent flexibility, and mechanical stability. Finally, the excellent electrochemical performance can be attributed to its unique vertically aligned configuration.
ORCiD logo [1] ;  [2] ;  [2] ;  [3] ;  [3] ;  [4]
  1. Hohai University, Nanjing (China). College of Science
  2. Hohai University, Nanjing (China). College of Science
  3. Nanjing Univ. (China). Nanjing National Laboratory of Solid State Microstructures
  4. Ames Lab., Ames, IA (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 1932-7447
Grant/Contract Number:
AC02-07CH11358; 2015B22314; 2016B46014
Accepted Manuscript
Journal Name:
Journal of Physical Chemistry. C
Additional Journal Information:
Journal Volume: 122; Journal Issue: 4; Journal ID: ISSN 1932-7447
American Chemical Society
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; CuSe@Co(OH)2; vertically-aligned; nanosheet arrays; all-solid-state; asymmetric supercapacitor
OSTI Identifier: