包覆钯和镍后MmNi_5基贮氢合金的电极特性

Electrode Characteristics of MmNi_5-bosed Alloys Coated with Palladium and Nickel

Ｍｍ＿（０．９）Ｔｉ＿（０．１）Ｎｉ＿（３．９）Ｍｎ＿（０．４）Ｃｏ＿（０．４）Ａｌ＿（０．３）合金包覆１０ｗｔ％钯－镍后，电极循环寿命和快速充放电性能有明显提高。同时，钯是较好的吸氢元素，这也提高了负极贮氢合金的电容量利用率。包覆钯－镍的贮氢合金电极２００次循环后电容量仅下降３％。

Negative electrodes of Mm0. 9Ti0.1Ni3. 9Mn0.4Co0.4Al0.3 alloy coated with 10wt% Palladium-nickel on thealloy powder surface have a long cycle life and high-rate dischargeability.Because palladium is a goedhydrogen-absorbing element,so the discharge capability of negative electrodes of hylirogen storage alloys isimproved. The decay in capacity of MH electrodes using Pd-Ni-coated alloy powder was only 3%after 200cycles.