A novel,environmentally friendly and facile method for oxidative energy storage in nickel hydroxide film electrodes  

一种新颖、环境友好和简易的实现氧化性能量在氢氧化镍膜电极中储存的新方法(英文)

作　　者：方文斌[1] 练惠勤[1] 王建明[1] 徐蕾[1] 张丽莹[1] 张鉴清[1] 居春山[2] 

机构地区：[1]浙江大学化学系,杭州310027 [2]江苏华富能源有限公司,高邮225600

出　　处：《Transactions of Nonferrous Metals Society of China》2012年第2期335-341,共7页中国有色金属学报（英文版）

基　　金：Projects (50972128,51174176) supported by the National Natural Science Foundation of China

摘　　要：The oxidative energy storage behaviors of a designed novel system comprising a nickel hydroxide film electrode and an oxygen-reducing platinum cathode were investigated by various electrochemical techniques. The structure and morphology of samples were characterized by scanning electron microscopy （SEM） and X-ray diffraction （XRD） analysis. It is found that the oxidative energy storage in the Ni（OH）2 electrodes can be obviously enhanced in the coupling system containing the cathode electrolytes with higher oxygen content or lower pH value. The results of the oxidation-discharge cycle tests show that the Ni（OH）2 film electrode oxidized in the coupling system with 1.0 mol/L Na2SO4 （pH=2） as cathode electrolyte for 600 s presents discharge capacities of 79.0 mC/cm2 at the first cycle and 97.9 mC/cm2 at the 12th cycle, suggesting the excellent reversibility of the investigated oxidative energy storage and conversion system.采用多种电化学方法研究了一种由氢氧化镍膜电极和氧还原电极组成的电化学电池体系的氧化性能量储存行为。应用扫描电子显微镜(SEM)和X射线衍射(XRD)分析方法表征样品的结构和表面形貌。研究发现,当耦合体系中阴极电解液的氧含量较高或pH值较低时,可以明显改善氧化性能量在氢氧化镍膜电极中的储存。氧化?放电循环测试结果表明,在采用1.0mol/LNa2SO4(pH=2)作为阴极电解液的耦合体系中氧化处理600s后,氢氧化镍膜电极在第1次和第12次循环后的放电容量分别为79.0和97.9mC/cm2。这表明设计的氧化性能量储存和转换体系具有优异的电化学可逆性。

关 键 词：oxidative energy storage nickel hydroxide film oxygen-reducing cathode OXIDATION 

分 类 号：TM911[电气工程—电力电子与电力传动]