Electrochemical discharging performance of 3D porous magnesium electrode in organic electrolyte  

三维结构多孔镁电极在有机电解液中的放电性能(英文)

作　　者：程刚[1] 徐强[1] 赵夕[1] 丁飞 张晶 刘兴江[1,2] 曹殿学 

机构地区：[1]天津大学化工学院,天津300072 [2]天津电源技术研究所化学与物理电源重点实验室,天津300384 [3]哈尔滨工程大学超轻材料与表面技术教育部重点实验室,哈尔滨150001

出　　处：《Transactions of Nonferrous Metals Society of China》2013年第5期1367-1374,共8页中国有色金属学报（英文版）

基　　金：Project(20973124)supported by the National Natural Science Foundation of China;Project supported by Key Laboratory of Superlight Materials and Surface Technology,Ministry of Education(Harbin Engineering University),China

摘　　要：A novel type of porous magnesium electrode with a stable 3D copper foam as current collectors for the organic magnesium-air battery was prepared by both amperostatic and pulsed electrodeposition of magnesium on copper foam substrates in an electrolyte of 1 mol/L EtMgBr/THF solution, respectively. Optimal parameters of the pulsed electrodeposition were obtained using a bending cathode at the right angle. The surface morphology of the porous electrode was investigated by SEM, and the discharging performance of the porous magnesium electrode was detected by the chronoamperometric measurement. The electrochemical stability of 3D copper foam current collectors was examined by cyclic voltammetry, SEM and ICP-OES analyses. The results show that the rate capability of the porous magnesium electrode with a stable 3D copper foam as a current collector is better than that of the planar magnesium electrode, and the rate capability of the porous magnesium electrode prepared by the pulsed electrodeposition is superior to that of the porous magnesium electrode prepared by the amperostatic electrodeposition. The 3D structure of copper foam current collectors of the porous magnesium electrode could keep stable during the discharging process.为了提高有机镁空气电池的放电性能,将1mol/LEtMgBr/THF溶液作为电解液,分别采用恒电流沉积和脉冲沉积的方法在泡沫铜基体上电沉积镁制备一种具有三维结构的多孔镁电极。利用直角弯曲阴极法优化脉冲电沉积的参数。通过扫描电子显微镜观察多孔镁电极的表面形貌,采用计时电流法考察多孔镁电极的放电性能。此外,还通过循环伏安、扫描电子显微镜和电感耦合等离子体发射光谱仪等方法考察泡沫铜集流体的三维结构稳定性。结果表明,多孔镁电极的倍率放电性能明显优于平板镁电极的;采用脉冲电沉积方法制备的多孔镁电极的倍率放电性能优于采用直流电沉积方法制备的多孔镁电极。在放电过程中,泡沫铜集流体的三维结构稳定性保持良好。

关 键 词：metal semi-fuel cell porous magnesium electrode copper foam ELECTRODEPOSITION discharge behavior 

分 类 号：O646[理学—物理化学] TM911[理学—化学]