La0.7Mg0.3Ni2.8Co0.5贮氢电极合金经过适当热处理后(1 123 K),最大放电容量、循环稳定性、高倍率放电性能(HRD)、交换电流密度(IO)以及极限电流密度(IL)都有明显改善,铸态合金电极的最大放电容量为392 mAh/g,放电电流密度Id=2 000 mA/g时,HRD2000=74.0%,IO=266.7 mA/g,IL=3 425.5 mA/g;经1 123 K保温8 h退火的合金电极的最大放电容量提高到414 mAh/g,HRD2000=76.2%,I0=407.9 mA/g,IL=3 753.6 mA/g.X射线衍射(XRD)分析表明,衍射峰宽度随着退火温度的升高而变窄,其原因是合金经退火处理相结构的变化和成分的均匀化.
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