Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 23    No. 5    May 2013

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Electrochemical discharging performance of 3D porous magnesium electrode in organic electrolyte
Gang CHENG1, Qiang XU1, Xi ZHAO1, Fei DING2, Jing ZHANG2, Xing-jiang LIU1,2, Dian-xue CAO3

1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;2. National Key Laboratory of Science and Technology on Power Sources Laboratory,Tianjin Institute of Power Sources, Tianjin 300384, China;3. Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education,Harbin Engineering University, Harbin 150001, China

Abstract: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.

 

Key words: metal semi-fuel cell; porous magnesium electrode; copper foam; electrodeposition; discharge behavior

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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