Facile synthesis of core shell structured PANI-Co3O4 nanocomposites with superior electrochemical performance in supercapacitors
Facile synthesis of core shell structured PANI-Co3O4 nanocomposites with superior electrochemical performance in supercapacitors
复制标题
轻松合成核壳结构的PANI-Co3O4纳米复合材料，在超级电容器中具有优异的电化学性能
DOI：
10.1016/j.apsusc.2015.11.171
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发表时间：
2016-01-15
影响因子：
6.7
通讯作者：
Xue, Chenyang
中科院分区：
文献类型：
--
作者：
Hai, Zhenyin;Gao, Libo;Xue, Chenyang
采用碳辅助法和原位聚合法相结合，合成了用于超级电容器应用的核壳结构PANI-Co3O4纳米复合材料。通过X射线衍射（XRD）、紫外可见分光光度法（UV-vis）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和水接触角（WCA）研究了超级电容器的晶体结构、光学带隙、形貌和亲水性能作为影响超级电容器性能的主要因素。核壳结构的PANI-Co3O4纳米复合材料具有非晶态PANI、小带隙、大表面积和良好的亲水性等特点，表明该纳米复合材料作为超级电容器电极材料具有优异的电化学性能。在 6 M KOH 水溶液中进行循环伏安法 (CV)、恒电流充放电和电化学阻抗谱 (EIS) 测量，以评估电化学性能。结果表明，核壳结构的PANI-Co3O4纳米复合材料在1.25 A g(-1)下表现出1184 F g(-1)的高比电容，1000次恒电流充放电循环后电容保持率为84.9%的优异循环稳定性，良好的导电性和离子扩散行为。 (C) 2015 Elsevier B.V. 保留所有权利。
Core-shell structured PANI-Co3O4 nanocomposites for supercapacitor applications were synthesized by combination of carbon-assisted method and in situ polymerization method. The crystalline structure, optical band gap, morphology, and hydrophilic property, as the major factors affecting the performances of supercapacitors, were investigated by X-ray diffraction (XRD), UV-vis spectrophotometry (UV-vis), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and water contact angle (WCA). The core-shell structured PANI-Co3O4 nanocompo sites are characterized by amorphous PANI, small bandgaps, large surface area and favorable hydrophilicity, which indicates the superior electrochemical performances of the nanocomposites as electrode material for supercapacitors. Cyclic voltammetry (CV), galvanostatic charge/discharge and electrochemical impedance spectroscopy (EIS) measurements were conducted in 6 M KOH aqueous solution to evaluate the electrochemical performances. The results shows that core-shell structured PANI-Co3O4 nanocomposites exhibit a high specific capacitance of 1184 F g(-1) at 1.25 A g(-1), excellent cycling stability of a capacitance retention of 84.9% after 1000 galvanostatic charge/discharge cycles, good electrical conductivity and ion diffusion behavior. (C) 2015 Elsevier B.V. All rights reserved.