Graphene nanoplatelets (GNPs) were introduced as conductive additives in the lithium iron phosphate (LiFePO4) composite cathode material through a facile slurry approach to study the effect on battery performance at high current rates (C-rates). The incorporation of GNPs helps to create a flexible three-dimensional conductive network through a plane-to-point connection with the LiFePO4 particles. Comparison electrochemical testing showed that the LiFePO4/GNP cathode exhibited a high specific discharge capacity of ~ 153 mAh g−1 at 0.1C, improved high C-rate performance, and enhanced electrochemical reactivity. The enhanced LiFePO4/GNP battery performance can be attributed to the better electronic transport properties facilitated by the capability of GNP to bridge multiple LFP particles owing to its larger surface area. Our results inform the ongoing effort in finding LiFePO4 cathodes that can perform at high current rates as the demand increases for lithium-ion battery usage.

中文翻译：

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用于高倍率 LiFePO4 电池阴极的石墨烯纳米片添加剂

通过简便的浆料方法将石墨烯纳米片（GNP）作为导电添加剂引入磷酸铁锂（LiFePO4）复合正极材料中，以研究在高电流速率（C-rates）下对电池性能的影响。GNP 的加入有助于通过与 LiFePO4 颗粒的平面到点连接来创建灵活的三维导电网络。比较电化学测试表明，LiFePO4/GNP 正极在 0.1C 下表现出~153 mAh g-1 的高比放电容量，提高了高 C 倍率性能，并增强了电化学反应性。增强的 LiFePO4/GNP 电池性能可归因于 GNP 由于其更大的表面积而桥接多个 LFP 颗粒的能力促进了更好的电子传输特性。