采用水热电化学法在Ni基体上制备了LiCoO2薄膜.反应温度影响薄膜的择优取向,80℃时制备的薄膜具有(003)取向,100℃制备的LiCoO2薄膜具有(101)和(104)取向,150℃时制备的薄膜取向性不明显.其中以100℃制备的(101)取向LiCoO2薄膜的电化学性能最好,其容量为143mAh/g;10次充放电后,薄膜电极容量衰减小.
LiCoO2 films were fabricated on nickel substrates by a hydrothermal-electrochemical method. The film prepared at 80℃ is mainly (003) plane oriented and prepared at 100℃, (101) and (104) plane oriented and prepared at 150℃ (003) plane oriented as well. The (101) plane orientation is favorable for Li+ diffusion through the cathode, and therefore the (101) plane oriented film contributes to the enhanced electrochemical performance. The film with (101) oriented prepared at 100℃ has the capacity of 143mAh/g and no obvious capacity attenuation detected.
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