In-situ synthesized binder-free flocculent TiO2-x film as anode for lithium-ion batteries
Document Type
Article
Publication Date
2-20-2020
Abstract
Herein, a novel in-situ approach is exploited to fabricate flocculent TiO2-x film on the Ti foil surface by efficient micro-arc oxidation (MAO) and hydrothermal reaction, which is used as a binder-free anode directly for lithium-ion batteries (LIBs). After introducing oxygen vacancies through hydrothermal reaction, many nano-particles grow on the surface of framework and form 3D flocculent structure. The electrochemical impedance of the as-prepared TiO2-x anode decreases one order of magnitude after hydrothermal treatment. As a result, this TiO2-x film delivers a high capacity of 844 mA h cm−3 (more than 200 mA h g−1) at current density of 10 μA cm−2, which is much higher than that of untreated TiO2 film (225 mA h cm−3). Furthermore, during the discharge-charge cycles, the nano-particles continue to shrink and homogenize without any cracks and dropping off on the surface because of its excellent stability. As a result, the conductivity of this TiO2-x film has a certain increament, which enhances the cyclic performance of the TiO2-x anode. These phenomena have great significance for its application in the field of LIBs.
Publication Source (Journal or Book title)
Electrochimica Acta
Recommended Citation
Tao, W., Wang, M., Zhu, B., Huo, W., Yang, R., Xiong, H., Tang, H., Wei, Z., & Wang, Y. (2020). In-situ synthesized binder-free flocculent TiO2-x film as anode for lithium-ion batteries. Electrochimica Acta, 334 https://doi.org/10.1016/j.electacta.2019.135569
