Journal of Physical Chemistry C
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)
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