This research utilizes anatase TiO 2 incorporated with lithium salt via a simple wet physical method to surface-modified the commercial graphite to form the lithium titanate/graphite composite coated with an amorphous carbon layer on its surface (the double core–shell structure) to enhance its surface conductivity. This double core–shell structure provides a stable specific capacity about 280 mAh/g under the high current density, 2.25 A/g with 15% capacity retention decay. Its intercalation potential is below 1 V that is much lower than that of 1.55 V, the intercalation potential of spinel Li 4 Ti 5 O 12 , to make higher power and energy density for a full cell.

中文翻译：

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尖晶石钛酸锂表面改性商用碳负极材料实现快速锂离子相互作用

本研究利用与锂盐结合的锐钛矿 TiO 2 通过简单的湿物理方法对商业石墨进行表面改性，形成钛酸锂/石墨复合材料，其表面涂有无定形碳层（双核壳结构）以增强其表面电导率。这种双核壳结构在高电流密度下提供约 280 mAh/g 的稳定比容量，2.25 A/g，容量保持衰减 15%。其嵌入电位低于1 V，远低于尖晶石Li 4 Ti 5 O 12 的嵌入电位1.55 V，从而为全电池提供更高的功率和能量密度。