研究了Pt掺杂对LiCoO2电化学性能的影响.以氧化物形式将少量Pt元素引入到 LiCoO2中,发现形成了LiCoO2-Li2PtO3-Pt混合化合物系统.比较了纯LiCoO2和该LiCoO2 基复合材料的电化学性能,结果显示复合材料具有比纯LiCoO2材料优秀得多的倍率性能,表 明Li离子在该复合化合物中有更快的扩散速率,恒电流滴定实验结果也证明了这一点.
The influence of the initial addition of Pt on the microstructure and electrochemical properties of synthesized LiCoO2-based material was investigated. A small amount of Pt additive induces Li2PtO3 and Pt in matrix LiCoO2 to form a multi-phase composite. This multi-phase composite shows the improved rate performance and cycleability at high rate in comparison with the single-phase of LiCoO2. This behavior is attributed to the enhanced diffusion of Li ion in the LiCoO2 matrix, which can be demonstrated by galvanostatic intermittent titration technique.
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