ABSTRACT
Li4Ti5O12 (LTO) is one of the most promising high-power anodes for lithium ion batteries, but its large-current performance is still undermined due to relatively poor ion/electron transfer. In this work, we report a powerful hydrothermal method for fabrication of highly porous binder-free Li4Ti5O12 films, which show hierarchical structure composed of interconnected primary nanoparticles of 50-100 nm and secondary nanowalls. The lithium ion storage performance of designed Li4Ti5O12 films is thoroughly studied and demonstrated with excellent high-rate performance. The as-prepared Li4Ti5O12 films exhibit a high specific capacity of 146 mAh g-1 at the current density of 2 C. In view of good structural stability, a notable cycling stability is verified with a specific capacity of 130 mAh g-1 after 5000 cycles at 2 C. Our method provides a novel route for synthesis of other advanced anodes for application in the field of ultrafast energy storage.
Graphical abstract
![](/cms/asset/0167bc75-d6de-455a-b959-187938f3de9e/ymte_a_1734724_uf0001_oc.jpg)
Highly porous binder-free Li4Ti5O12 films are synthesised via a hydrothermal method and exhibit a noticeable high-rate electrochemical performance as the anode of lithium ion batteries.
Acknowledgments
This work was supported by projects from material corrosion and protection key laboratory of Sichuan province (2015CL11), education department of Hunan province (15A129), Hunan Provincial Natural Science Foundation (14JJ2123), Key R&D project of Hunan Province (2019NK2033), National Natural Science Foundation of China (Grant No. 51772272), Natural Science Funds for Distinguished Young Scholar of Zhejiang Province (Grant No. LR20E020001), Startup Foundation for Hundred-Talent Program of Zhejiang University, and National youth talent support program of China.
Disclosure statement
No potential conflict of interest was reported by the authors.