Issue 12, 2023

Compositionally variant bimetallic Cu–Mn oxysulfide electrodes with meritorious supercapacitive performance and high energy density

Abstract

Rational design and fabrication of low-cost, earth-abundant electrode materials for energy conversion and storage devices is immensely needed. Herein, we demonstrate the successful fabrication of Cu–Mn mixed-metallic oxysulfides (Cu–Mn–OS) and their use as supercapacitor electrodes, benefiting from the integrated advantages of both oxides and sulfides as well as the combined contribution from both Cu and Mn elements. In particular, the C3M1OS electrode performs exceptionally well in a three-electrode system, revealing a very high capacity of 1525.1 C g−1 (3177.2 F g−1) at a current density of 1 A g−1. Moreover, using commercial activated carbon (AC) as the negative pole and a C3M1OS electrode as the positive pole, the fabricated asymmetric supercapacitor device (C3M1OS//AC) exhibits a very high energy density of 76.56 W h kg−1 along with a power density of 985.01 W kg−1 at 1 A g−1 with superior electrochemical stability and efficiency over 10 000 cycles. The current work not only proposes a straightforward, single-step strategy for the fabrication of mixed-metallic oxysulfide electrodes but also establishes a new avenue for the fabrication of a standout candidate electrode for energy storage devices with a distinctive specific energy.

Graphical abstract: Compositionally variant bimetallic Cu–Mn oxysulfide electrodes with meritorious supercapacitive performance and high energy density

Supplementary files

Article information

Article type
Paper
Submitted
24 ago 2023
Accepted
07 out 2023
First published
09 out 2023
This article is Open Access
Creative Commons BY-NC license

Energy Adv., 2023,2, 2129-2139

Compositionally variant bimetallic Cu–Mn oxysulfide electrodes with meritorious supercapacitive performance and high energy density

H. M. El Sharkawy, A. M. Elbanna, G. E. Khedr and N. K. Allam, Energy Adv., 2023, 2, 2129 DOI: 10.1039/D3YA00415E

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