利用柠檬酸络合法制备锂离子电池正极材料尖晶石型LiMn2O4,利用X射线衍射、循环伏安、充放电测试、交流阻抗等手段对它进行了研究.发现活性物质在不同的电位下具有不同的电化学特征,电位处在平台区时与处在非平台区时相比,交流阻抗谱明显不同.电位处于非充放电平台区时,高频表现为锂离子电极材料中的固态扩散,在充放电平台区时,高频表现为电子到达活性物质的通道的阻抗.
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