Abstract A flexible, free-standing composite anode with Li4Ti5O12 nanosheet arrays anchoring on plain-weaved carbon fiber cloth (LTO@CC) is prepared by a hydrothermal and post-annealing process assisted by a TiO2 seed layer. The LTO@CC anode free from polymeric binder and conducting agent exhibited much higher lithium storage capacity and cycling stability than the conventional slurry-processed electrode using the dandelion-like Li4Ti5O12 microspheres prepared by the same hydrothermal process. A high specific capacity of 128.8 mA h g−1 was obtained at a current rate of 30 C (1 C = 175 mA g−1), and almost negligible capacity loses was observed when the cell was cycled at 10, 20 and 30 C each for 100 cycles. The carbon fiber matrix contributed to Li storage at low current rate, but the LTO nanosheet arrays have played the dominant role on the excellent rate capability. The improved electrochemical performance can be attributed to the synergetic effect between the hierarchical Li4Ti5O12 nanosheet arrays and the carbon fiber matrix, which integrated short Li+ diffusion length, three-dimensional conductive architecture and well preserved structural integrity during the high rate and repeated charge-discharge measurements.

中文翻译：

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分层Li 4 Ti 5 O 12 纳米片阵列锚定在碳纤维布上作为锂离子电池的超稳定独立阳极

摘要 通过水热和后退火工艺，在 TiO2 种子层的辅助下，制备了一种柔性、独立的复合阳极，将 Li4Ti5O12 纳米片阵列固定在平纹碳纤维布 (LTO@CC) 上。与使用相同水热工艺制备的蒲公英状 Li4Ti5O12 微球的传统浆料处理电极相比，不含聚合物粘合剂和导电剂的 LTO@CC 负极表现出更高的锂存储容量和循环稳定性。在 30 C (1 C = 175 mA g-1) 的电流速率下获得了 128.8 mA hg-1 的高比容量，当电池分别在 10、20 和 30 C 下循环时，观察到的容量损失几乎可以忽略不计100 个循环。碳纤维基体有助于在低电流速率下储存锂，但 LTO 纳米片阵列在优异的倍率性能方面发挥了主导作用。电化学性能的改善可归因于分层 Li4Ti5O12 纳米片阵列和碳纤维基质之间的协同效应，其在高倍率和重复充放电测量过程中集成了短的 Li+ 扩散长度、三维导电结构和良好保持的结构完整性.