聚吡咯
材料科学
普鲁士蓝
超级电容器
石墨烯
纳米复合材料
化学工程
假电容
三元运算
傅里叶变换红外光谱
循环伏安法
氧化物
扫描电子显微镜
聚合
电化学
电极
纳米技术
复合材料
化学
聚合物
冶金
程序设计语言
物理化学
工程类
计算机科学
作者
Yongjin Zou,Qingyong Wang,Cuili Xiang,Zhe She,Hailiang Chu,Shujun Qiu,Fen Xu,Shu‐Sheng Liu,Chengying Tang,Lin Sun
标识
DOI:10.1016/j.electacta.2015.11.123
摘要
A ternary composite of polypyrrole (PPy), Prussian blue (PB), and graphene oxide (GO), PPyPBGO, was successfully prepared through spontaneous polymerization of pyrrole and formation of PB nanocubes on GO. The obtained nanocomposite was characterized by transmission electron microscopy, scanning electron microscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy. The results indicate that the PPy-protected PB nanocubes were well dispersed on the GO. Electrochemical testing showed a specific capacitance of 525.4 F g1 at a current density of 5 A g1 in the potential range from 0.2 to 0.6 V, obtained in an electrolyte of 1 mol L1 KNO3 during the galvanostatic chargedischarge cycles, which is superior to the performance of binary cathode materials, including PPyPB and PPyGO nanocomposites. The as-prepared supercapacitor could retain a specific capacitance of 96% after 2000 cycles. It was confirmed that the three componentsPPy, PB, and GOled to the display of integrated electrochemical behavior and a resulting capacitor with enhanced performance. The significant enhancement in electrochemical performance of the ternary nanocomposite can be attributed to the synergistic effect of PPy-protected PB nanocubes dispersed on GO sheets with the pseudocapacitance from PB and PPy on the double-layer capacitance from GO.
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