WS2/Mesoporous Carbon Nanostructures as a Bifunctional Electrode for All Quasi‐Solid‐State Supercapacitor and Oxygen Evolution Reaction

Author:

Iqbal Muzahir1,Saykar Nilesh G.1,Singh Abhijeet1,Ahmed Imtiaz2,Arya Anil3,Haldar Krishna Kanta2,Mahapatra S. K.1ORCID

Affiliation:

1. Department of Physics School of Basic Sciences Central University of Punjab Bathinda 151401 India

2. Department of Chemistry School of Basic Sciences Central University of Punjab Bathinda 151401 India

3. Department of Physics Amity University Punjab Mohali 140306 India

Abstract

Abstract2D transition‐metal sulfides have developed as favorable electroactive materials for electrochemical energy storage and conversion applications. In this work, WS2/mesoporous carbon (MC) is developed by a one‐step hydrothermal technique for supercapacitor and oxygen evaluation reaction (OER) application. However, the metal sulfides have poor rate and cyclic performance due to the aggregations between two layers of structures restricting their performance. The interaction between WS2 nanosheets and MC produces a synergistic effect, resulting in a decent electrochemical energy storage and conversion application. The synthesized materials used to prepare quasi‐solid‐state symmetric (QSSS) and asymmetric (QSSA) supercapacitor configuration enable the highest specific capacitance (CSP) of 305.45 F g−1 and 204.21 F g−1@ 10 mV s−1, respectively. Moreover, the specific energy and power density of QSSS and QSSA devices are 31.1 Wh kg−1 @824.95 W kg−1 and 24.74 Wh kg−1 @549.84 W kg−1, respectively. Additionally, the multifunctionality of the synthesized binary nanocomposite is also tested for OER. The composite shows a desirable over potential of 307 mV in 6 m KOH electrolyte, with a 69 mV dec−1 Tafel slope. The dual role of WS2/MC for energy storage and oxygen evaluation reaction conversion reveals the potential of metal sulfides.

Publisher

Wiley

Subject

Industrial and Manufacturing Engineering,Mechanics of Materials,General Materials Science

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