Cylindroid‐Like Li4Ti5O12 Mesocrystals for High‐Rate and Long‐Life Lithium‐Ion Battery Anodes

A high rate and long life are two crucial factors for next‐generation lithium‐ion batteries (LIBs). Here, we report cylindroid‐like Li4Ti5O12 mesocrystals (CL‐LTO‐MC) obtained by a simple solvothermal reaction and following short thermal annealing process. Owing to the single‐crystal nature and mesoporous structures, CL‐LTO‐MC demonstrates a high specific capacity (174.7 mA h g−1 at 1 C), superior rate performance (145 mA h g−1 at 50 C) and excellent cycling stability (95.5% capacity retention after 3000 cycles at 20 C). Besides, the CL‐LTO‐MC/LiNi0.5Mn1.5O4 full cells also display a remarkable cycle performance with 95.7% capacity retention after 500 cycles at 5 C. These results indicate that CL‐LTO‐MC is a promising anode material for high‐rate and long‐cycling LIBs. Cylindroid‐like LTO mesocrystals were synthesized via a simple solvothermal reaction and following short thermal annealing process. Owing to the mesoporous structures, large surface areas and single‐crystal nature, LTO mesocrystals display an excellent high‐rate cycling stability with 95.5% capacity retention after 3000 cycles at 20 C. The results demonstrate that the novel LTO mesocrystals are promising anode materials for high‐rate and long‐cycling lithium‐ion batteries.