首页|Improvement in capacity of cobalt-free Mm-based hydrogen storage alloys with good cycling stability
Improvement in capacity of cobalt-free Mm-based hydrogen storage alloys with good cycling stability
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NSTL
A multi-phase and multi-component cobalt-free Mm-based hydrogen storage alloy was examined. The phase composition, alloy microstructure, P-C-T and electrochemical properties were investigated. The physical and electrochemical properties of the cobalt-free alloy were compared with a typical AB_5 alloy containing higher cobalt content and with a low-cobalt Mm-based alloy. The results showed that the cobalt-free alloy had a flatter discharge plateau with electrochemical capacity of 302 mAh/g at 0.2 C rate and good rate-capability. The hydrogen storage capacity of the cobalt-free alloy was significantly improved as compared with that of the low-cobalt Mm-based alloy (273 mAh/g). The cobalt-free Mm-based hydrogen storage alloy is a promising candidate for development of low-cost NiMH batteries with high capacity, good rate capability and cycling stability.
NSTL
