One-pot synthesis of ternary polypyrrole-Prussian-blue-graphene-oxide hybrid composite as electrode material for high-performance supercapacitors
One-pot synthesis of ternary polypyrrole-Prussian-blue-graphene-oxide hybrid composite as electrode material for high-performance supercapacitors
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一锅法合成三元聚吡咯-普鲁士蓝-石墨烯-氧化物杂化复合材料作为高性能超级电容器电极材料
DOI：
10.1016/j.electacta.2015.11.123
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发表时间：
2016
影响因子：
6.6
通讯作者：
Sun Lixian
中科院分区：
文献类型：
--
作者：
Zou Yongjin;Wang Qingyong;Xiang Cuili;She Zhe;Chu Hailiang;Qiu Shujun;Xu Fen;Liu Shusheng;Tang Chengying;Sun Lixian
通过吡咯的自发聚合和普鲁士蓝（PB）在氧化石墨烯（GO）表面形成纳米立方体，成功制备了聚吡咯（PPy）、普鲁士蓝（PB）和氧化石墨烯（GO）三元复合材料PPy <$PB <$GO。采用透射电子显微镜、扫描电子显微镜、X射线衍射和傅里叶变换红外光谱对所得纳米复合材料进行了表征。结果表明，PPy保护的PB纳米立方体在GO上分散良好。电化学测试表明，在恒电流充放电循环期间，在1 mol L·mol·L-1 KNO 3的电解质中，在从0.2至0.6 V的电位范围内，在5 A·g-1的电流密度下，比电容为525.4 F·g-1，这上级于二元阴极材料的性能，包括PPy·PB和PPy·GO纳米复合材料。所制备的超级电容器在2000次循环后仍能保持96%的比容量。证实了三种组分PPy、PB和GO的混合导致了综合电化学行为的显示和具有增强性能的所得电容器。三元纳米复合材料的电化学性能的显着增强可以归因于分散在GO片上的PPy保护的PB纳米立方体与来自PB和PPy的赝电容对来自GO的双电层电容的协同效应。
A ternary composite of polypyrrole (PPy), Prussian blue (PB), and graphene oxide (GO), PPy⿿PB⿿GO, 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 g⿿1at a current density of 5 A g⿿1in the potential range from ⿿0.2 to 0.6 V, obtained in an electrolyte of 1 mol L⿿1KNO3during the galvanostatic charge⿿discharge cycles, which is superior to the performance of binary cathode materials, including PPy⿿PB and PPy⿿GO nanocomposites. The as-prepared supercapacitor could retain a specific capacitance of 96% after 2000 cycles. It was confirmed that the three components⿿PPy, PB, and GO⿿led 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.