A novel H2O2-assisted method to fabricate Li4Ti5O12/TiO2 materials for high-performance energy storage

作者：Zhou, Jianqing; Zhu, Qiancheng; Hu, Hao; Chen, Wenjuan; Yu, Ying^*

来源：Electrochimica Acta, 2018, 281: 142-151.

DOI：10.1016/j.electacta.2018.05.155

• Hydrogen peroxide
• Spinel Li4Ti5O12
• Commercial titania
• Low temperature
• Energy storage

Spinel Li4Ti5O12 known as a "zero-strain" anode material for Li-ion battery has attracted much attention because of its superior safety and stability. Herein, we report a novel H2O2-assisted one-step hydrothermal method to synthesize different ratio Li4Ti5O12/TiO2 composites with the same amount of raw materials. For the first time, Li4Ti5O12 was prepared directly from commercial titania with the presence of H2O2, and different proportion Li4Ti5O12/TiO2 composites were fabricated only by adjusting the amount of H2O2. The reaction mechanism of the novel H2O2-assisted method was clearly investigated, and H2O2 plays a crucial role in the formation of intermediate Li1.81H0.19Ti2O5 center dot 2H(2)O. Further, the electrochemical performance of different ratio Li4Ti5O12/TiO2 composites have been investigated. This facile method is also applicable for the preparation of Na2Ti6O13/TiO2 material, and provides us the new way to fabricate composite materials.

• 出版日期2018-8-10
• 单位华中师范大学