Design Of Nanomaterials And Fiber-shaped Wearable Supercapacitor Based On TiO₂/Mn₃O₄,NCWs/Fe₂O₃ And TiN/MON

Supercapacitors have the advantages of ultrahigh power density,pretty high energy density,long cycle life and broad environmental adaptability,which propels their potential as power source in electric system.Meanwhile,fiber supercapacitors attract much attention for using as micro-wearable and portable energy storage device in every day clothes because of their flexible and knittable properties.In this paper,capacitive performance and corresponding fiber devices based on TiO₂/Mn₃O₄,NCWs/Fe₂O₃ and TiN/MON are systematically studied.The main conclusions are presented as following:1.Nanowire-like Mn₃O₄ electrode materials were synthesized by electrochemical deposition.Based on the 1 D carbon fibers,the TiO₂/Mn₃O₄ electrodes showed the capacitance of 22.69 m F cm^-1 at the scan rate of 10 mV s^-1.After the combination with negative electrode,the asymmetric fiber device exhibited its excellent flexible stability,tailorable and reconfigurable performance.2.The carbon fiber-based electrodeposited polypyrrole was annealed for synthesis of nitrogen-doped carbon nanowires?NCWs?.After dipping in the Prussian blue?PB? solution,the NCWs got enrichment of PB particles.Then we attained the NCWs/Fe₂O₃ electrode after annealing.The electrode exhibited the operate window of 2V and energy density of 2.7 mWh cm^-3.Morever,the fiber device exhibited excellent cycling and mechanical stability.3.The titanium wire with good conductivity was chosen as structure.After the hydrothermal process,the hexagonal MoO₃ micropillars were prepared.Compared with different level of nitridation,low-value-states MoO₂ and MoN phases contributed to improving capacitance and conductivity.The TiN/MON electrode exhibited the linear capacitance of 64.8 m F cm^-1 at the scan rate of 10 mV s^-1.