基于Co_3O_4纳米花/rGO复合材料的全固态柔性超级电容器研究  

Study on all-solid-state flexible supercapacitors based on Co_3O_4 nanoflowers/rGO composites

作　　者：熊志宏 胡泊 张月 胡永明[1] XIONG Zhihong;HU Po;ZHANG Yue;HU Yongming(Faculty of Physics and Electronic Science,Hubei University,Wuhan 430062,China)

机构地区：[1]湖北大学物理与电子科学学院,湖北武汉430062

出　　处：《湖北大学学报（自然科学版）》2018年第6期627-630,636,共5页Journal of Hubei University：Natural Science

基　　金：国家自然科学基金(61274073)资助

摘　　要：采用水热法在180℃条件下保温12 h获得了四氧化三钴(Co_3O_4)纳米花,并将其与还原氧化石墨烯(rGO)复合成薄膜状纳米材料.基于该复合材料和凝胶状电解质(KOH-PAAK)组装成全固态柔性超级电容器.结果显示,该器件有近似矩形的循环伏安曲线(CV),近三角形的恒流充放电曲线(GCD),表明该器件具有较快的电子迁移速度和响应速度.通过GCD曲线可以计算,该器件有190 F/g的比电容.稳定性测试表明,在循环1×10~4次后,该器件仍有90%的容量剩余,表明了其良好的循环稳定性.Co3O4 nanoflowers were synthesized by a conventional hydrothermal method at 180℃for 12 h,and Co 3 O 4 nanoflowers/reduced graphene oxide(rGO)composites were prepared by mechanical mixing process.The flexible all-solid-state supercapacitors(SCs)were constructed using Co 3 O 4 nanoflowers/rGO composites electrodes and KOH-PAAK gel as electrolyte.The results show that the SCs have nearly rectangular cyclic voltammetry and linear charge/discharge curves,which indicates its fast electronic migration and response speed.The specific capacitance of the SC is 190 F/g.with an excellent cycling performance(capacitance retention of 90%after 10 000 cycles).

关 键 词：四氧化三钴 柔性超级电容器 循环伏安曲线 恒流充放电 

分 类 号：TM53[电气工程—电器] TQ343[化学工程—化纤工业]