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CaMoO₄ Nanoparticle-Doped Graphene Oxide as Electrodes for High-Performance Supercapacitors

Gang Chen

College of Mathematics and Physics, Shanghai University of Electric Power, Shanghai 200090, P. R. China

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Guangzhou Chen

College of Mathematics and Physics, Shanghai University of Electric Power, Shanghai 200090, P. R. China

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Li Pan

College of Mathematics and Physics, Shanghai University of Electric Power, Shanghai 200090, P. R. China

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, and

Dongsheng Chen

https://orcid.org/0000-0002-5781-7658

College of Mathematics and Physics, Shanghai University of Electric Power, Shanghai 200090, P. R. China

E-mail Address: cds78@shiep.edu.cn

Corresponding author.

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https://doi.org/10.1142/S1793292022500278Cited by:5 (Source: Crossref)

Abstract

CaMoO₄ nanoparticles/graphene oxide (CaMoO₄/GO) composites are prepared by a facile hydrothermal method. CaMoO₄ nanoparticles are adsorbed on the GO sheets by in situ reduction. Along with the synergistic effect between the CaMoO₄ and GO sheets, the CaMoO₄/GO nanocomposites exhibited high performances as electrodes for supercapacitors. The specific capacity ( $Q_{s})$ $Q_{s})$ of the CaMoO₄/GO electrodes could be up to 571.82F $\cdot$ $\cdot$ g $^{- 1}$ $^{- 1}$ at 0.5A $\cdot$ $\cdot$ g $^{- 1}$ $^{- 1}$ . Furthermore, asymmetric supercapacitors (ASCs) are mainly composed of CaMoO₄/GO composite and activated carbon (AC), respectively. The fabricated CaMoO₄/GO//AC devices display an energy density of 25.18W $\cdot$ $\cdot$ h $\cdot$ $\cdot$ kg $^{- 1}$ $^{- 1}$ at 1710.3W $\cdot$ $\cdot$ kg $^{- 1}$ $^{- 1}$ . A blue LED is powered using two series-connected two ASC devices. These results indicate the considerable potential of CaMoO₄/GO for use in high-performance energy storage devices.

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