La(Ni3 .5Co0.8Mn0.4Al0.3)電化學(xué)性能的影響
(中國科學(xué)院金屬研究所, 遼寧省材料與氫重點試驗室， 沈陽 110015)
摘 要: 通過稀土族金屬中鈰、鐠和釹部分替代AB5 儲氫合金中的鑭，研究了稀土組元變化(共13組成分變化)對合金電極電化學(xué)性能的影響。 結(jié)果表明稀土組元含量變化明顯影響合金電極的電化學(xué)性能。鐠對保持儲氫合金電極的高放電容量有利，當(dāng)含0.2%(摩爾分數(shù))時放電容量達290 mA·h／g，鈰則相反；隨釹含量的增加，電池的放電容量也降低。
關(guān)鍵字: 稀土 儲氫合金 電極 放電容量
（Institute of Metal Research, Chinese Academy of Sciences, Liaoning Key Laboratory of Materials and Hydrogen, Shenyang 110015, P. R. China）
Abstract:The influences of rare earth Ce, Pr and Nd taking place of some La among AB5 hydrogen stroage alloy(13 samples) on the properties of electrochemistry were studied. The results showed that some change of rare earth component has a great effect on the electrochemical property of AB5 -based hydrogen storage alloy. The influence of Pr on the properties of electrochemistry of alloy electrode is smaller than that of Ce. Pr is useful for keeping the high discharge capacity of the hydrogen storage alloy electrode (The discharge capacity is 290mAh/g when its content is 0.2% (mole fraction)), while Ce is harmful. The discharge capacity of hydrogen storage alloy electrode decreases with increasing content of Nd.
Key words: are-earth hydrogen storage alloy electrode discharge capacity
Key words: are-earth hydrogen storage alloy electrode discharge capacity
