基于石墨烯的碘化锌储能器件的电化学性能  

Electrochemical Performances of Zinc Iodide Energy Storage Devices Based on the Graphene

作　　者：钱瑞 金振宇 徐少辉[1] 熊大元[1] 王连卫[1] Qian Rui;Jin Zhenyu;Xu Shaohui(Key Laboratory of Polar Materials and East China Normal University, Xiong Dayuan, Wang Lianwei Devices of Ministry of Education, Shanghai 200241, China)

机构地区：[1]华东师范大学极化材料与器件教育部重点实验室

出　　处：《微纳电子技术》2018年第10期701-706,共6页Micronanoelectronic Technology

基　　金：国家自然科学基金资助项目(61176108);上海市科学技术委员会资助项目(14DZ2260800)

摘　　要：采用还原性氧化石墨烯（RGO）修饰的石墨毡（GF）作为碘化锌储能器件的电极。采用改进型Hummers法制备氧化石墨烯（GO），然后使用溶剂热法将其生长于石墨毡上，形成还原性氧化石墨烯修饰的石墨毡（RGO-GF）。通过改变氧化石墨烯与乙醇的体积比，研究了不同体积比对RGO-GF电化学性能的影响。采用场发射扫描电子显微镜（FE-SEM）、X射线衍射仪（xRD）和喇曼光谱对其表面及形貌进行了表征。通过循环伏安曲线（CV）、电化学阻抗谱（EIS）和计时电位法等电化学测试方法研究了其电化学性能。研究结果表明，在氧化石墨烯与乙醇体积比为5．3％时，RGO-GF拥有最好的电化学性能，在5mA／cm。的充放电电流密度下，比电容可以达到4．5F／cm2。The graphite felt （GF） modified by the reduced graphite oxide （RGO） was used as the electrode of the zinc iodide energy storage devices. The graphene oxide （GO） was prepared by modified Hummers, and then grown on the graphite felt by solvothermal method to form the graphite felt modified by the reduced graphene oxide （RGO-GF）. By changing the volume ratio of the graphene oxide to ethanol, the effects of different volume ratios on the electrochemical per- formance of the RGO-GF were studied. The surface and morphology of the RGO-GF were charac- terized by field emission scanning electron microscope （FE-SEM）, X-ray diffractometer （XRD） and Raman spectroscopy. The electrochemical performances of the RGO-GF were studied by the cyclic voltammetric （CV） curve, electrochemical impedance spectroscopy （EIS）, chronopoten- tiometry and other electrochemical test methods. The research results show that the RGO-GF has the best electrochemical performance when the volume ratio of graphene oxide to ethanol is 5.3%, and the specific capacitance can reach 4.5 F/cm2 under the charge-discharge current density of 5 mA/cm2.

关 键 词：碘化锌储能器件 还原性氧化石墨烯(RGO) Hummers 溶剂热法 石墨毡(GF) 

分 类 号：TM919[电气工程—电力电子与电力传动] TH703[机械工程—仪器科学与技术]