Electrochemical properties of AB5 type hydrogen storage alloyas anode electrocatalyst of PEMFC|CHEN Yun(陈昀), WANG Xin-hua(王新华), CHEN Chang-pin(陈长聘),CHEN Li-xin(陈立新), C.A.C. Sequeira-《中国有色金属学报》官方网站|全网首发|论文开放获取

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 15 No. 2 April 2005

Electrochemical properties of AB₅ type hydrogen storage alloy as anode electrocatalyst of PEMFC

CHEN Yun(陈昀)^1,2, WANG Xin-hua(王新华)¹, CHEN Chang-pin(陈长聘)¹,
CHEN Li-xin(陈立新)¹, C.A.C. Sequeira²

（1. Department of Materials Science and Engineering, Zhejiang University,
Hangzhou 310027, China;
2. Department of Chemical Engineering, Instituto Superior Tecnico,
Lisbon 1049-001, Portugal）

Abstract: The electrocatalytic properties of hydrogen storage alloy(HSA) MlNi_3.65Co_0.85Al_0.3Mn_0.3 substituting Pt as anode electrocatalyst of PEMFC was investigated. It is found that, after being optimized, the electrocatalytic abilities of the HSA is reasonably good, the current density of the HSA anode membrane and electrode assembly(MEA) reaches 168mA/cm² at 0.5V and 232.4mA/cm² at 0.2V, and its power density reaches the maximum value of 84mW/cm². The influence of operating temperature and hydrogen pressure on the electrocatalytic behavior of HSA anode MEA is also discussed. At 60℃ under 2.02×10⁵Pa H₂, the HSA anode shows the best electrochemical properties.

Key words: MlNiCoAlMn alloy; hydrogen storage alloy; fuel cell; anode; electrochemical property

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

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