SCHEDULED MAINTENANCE
MoO2/Mo2N hybrid nanobelts doped with gold nanoparticles and their enhanced supercapacitive behavior†
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Abstract
MoO2/Mo2N hybrid nanobelts doped with gold nanoparticles (AuNPMoON) were synthesized via one-step thermal-treatment of MoO3 nanobelts and HAuCl4. AuNPMoON nanobelts with a width of ca. 200 nm and an Au content of 1.08 wt% prepared in the presence of HAuCl4 exhibited a higher specific capacitance of 348 F g−1 than those prepared in the absence of HAuCl4 (21 F g−1) at a current density of 0.5 A g−1. The influence of Au content on the electrochemical performance of AuNPMoON was investigated. For practical application, two types of supercapacitor devices, PANI||AuNPMoON and AC||AuNPMoON, were assembled. The PANI||AuNPMoON device delivered an energy density of 10.64 W h kg−1, which is higher than that of the AC||AuNPMoON device (8.11 W h kg−1). Meanwhile, the specific capacitance retentions were 87.8% and 85.5% for the PANI||AuNPMoON and AC||AuNPMoON devices after 2000 cycles, respectively.
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