Potentially enlarged supercapacitive values for CdS-PPY decorated rGO nanocomposites as electrode materials
Potentially enlarged supercapacitive values for CdS-PPY decorated rGO nanocomposites as electrode materials
复制标题
DOI：
10.1016/j.matchemphys.2018.06.015
复制
发表时间：
2018-09
影响因子：
4.6
通讯作者：
B. Purty;R. Choudhary;A. Biswas;G. Udayabhanu
中科院分区：
文献类型：
--
作者：
B. Purty;R. Choudhary;A. Biswas;G. Udayabhanu
通过化学氧化原位聚合工艺合成了硫化镉/聚吡咯修饰的还原氧化石墨烯（rGO/CdS/PPY）纳米片。研究了 CdS 纳米粒子对 rGO 掺入聚合物基质 (PPY) 的影响。使用傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、拉曼光谱、紫外-可见光谱（UV-vis）、场发射扫描电子显微镜（FESEM）和能量色散X射线（EDX）技术对所制备的纳米片进行了表征。通过热重分析（TGA）检查它们的热稳定性。使用循环伏安法（CV）、恒电流充放电（GCD）、循环稳定性和电化学阻抗谱（EIS）技术进行电化学测量。含有 10wt% CdS (GCP10) 的纳米复合材料在电流密度～1Ag−1 下表现出增强的比电容～844Fg−1。这种纳米复合材料具有 2.8Ω 的低等效串联电阻 (ESR) 和良好的循环稳定性，在 2000 个连续循环后电容保持率为 92.8%。研究表明所制备的纳米复合材料被证明是超级电容器应用中电极材料的有前途的候选者。
Cadmium sulfide/polypyrrole decorated reduced graphene oxide (rGO/CdS/PPY) nanosheets were synthesized via chemical oxidativein-situpolymerization process. The impact of CdS nanoparticle on rGO incorporated polymeric matrix (PPY) was investigated. The as prepared nanosheets were characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Raman spectroscopy, ultraviolet-visible spectroscopy (UV-vis), field emission scanning electron microscope (FESEM) and energy dispersive x-ray (EDX) techniques. Their thermal stability was examined by thermogravimetric analysis (TGA). The electrochemical measurements were performed using cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), cyclic stability and electrochemical impedance spectroscopic (EIS) techniques. The nanocomposite containing 10 wt % CdS (GCP10) showed an enhanced specific capacitance ∼844 F g−1at current density ∼1 A g−1. This nanocomposite displayed low equivalent series resistance (ESR), of 2.8 Ω and good cyclic stability with capacitance retention 92.8% after 2000 consecutive cycles. The investigation indicated that the as prepared nanocomposite proved as a promising candidate for electrode materials in supercapacitor application.