Narrow Results

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 ($Q_s)$ of the CaMoO₄/GO electrodes could be up to 571.82F$\cdot$g${}^{-1}$ at 0.5A$\cdot$g${}^{-1}$. 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$\cdot$h$\cdot$kg${}^{-1}$ at 1710.3W$\cdot$kg${}^{-1}$. 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.