采用氢驱动的化学反应法制备Li7 Al3 Si4三元合金,研究了高能球磨对其结构、颗粒形貌及电化学性能的影响.结果发现,放氢后的产物主要包含Li7 Al3 Si4和LiAlSi及微量Si.在550～650℃的范围内,随着反应温度的提高,样品的放氢量有所增加,但颗粒尺寸也有所增大.电化学研究表明,600℃放氢样品的最大放电和充电容量分别为996和845mAh/g,相应的库伦效率为～85％,30个循环后的容量保持率约为50％.高能球磨改变了样品的颗粒形貌和相组成,从而改善了其循环稳定性能.12h球磨的样品的最大放电容量约为968mAh/g,30个循环后的容量保持率约为58％.
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