橄榄石型结构的磷酸铁锂(LiFePO4)有望成为一种安全性高、价格低、电化学性能优良的锂离子电池的正极材料.然而由于自身晶体结构的本征特性,LiFPO4具有室温下电子导电率低、离子传导率差等缺点,这已成为限制其应用的最大障碍.通过导电碳包覆及金属或金属离子掺杂等改性方法提高这种材料的电子导电率已成为锂离子电池材料领域的研究热点之一.在综述了磷酸铁锂改性研究最新进展的基础上,提出了正极材料LiFePO4未来的主要研究发展方向.
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