采用溶胶凝胶法成功制备了锂离子电池Li1.2Mn0.56 Ni0.16Co0.08O2正极材料,利用扫描电镜(SEM)、循环伏安(CV)及充放电等测试手段研究了该材料的微观形貌和电化学性能.SEM表征结果表明,合成的Li1.2 Mn0.56 Ni0.16 Co0.08O2粒径约为2μm,呈长片层状结构.CV测试表明,经过首次循环后,Li2 MnO3组分得到活化,并转变为具有电化学活性的LiMnO2,造成了锂离子的不可逆损失.充放电测试表明,在0.2C倍率循环时,Li1.2Mn0.56 Ni0.16 Co0.08 O2材料的首次放电比容量为199.7 mA·h/g.倍率性能测试表明,在经过36次充放电循环后,材料仍有很高的容量保持率.
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