TiO2 nanomaterials on reduced graphene oxides as anode materials for Li ion batteries
Project leader: Mengmeng Zhen
College: Environmental Science and Engineering College
Project content: We use a low-cost and environmentally friendly hydrothermal route to prepare RGO nanosheet-supported TiO2 nanomaterials and research the electrochemical performance of TiO2/RGO composites.
We used a low-cost and environmentally friendly hydrothermal route to prepare RGO nanosheet-supported TiO2 nanomaterials. The basic process is as follows:
The crystal phase, morphology, size, and structural features of TiO2-RGO composites are characterized by using XRD, SEM and TEM. These figures showed the TiO2 is anatase TiO2, TiO2 fiber bundles are grown directly on the RGO nanosheets that are composed of irregular nanorods.
Figure 1. XRD patterns of as-prepared TiO2-RGO composites and pure TiO2.
Figure 2. A, B) SEM, and C, D) TEM images of the as-prepared TiO2-RGO composites.
We research the electrochemical performance of TiO2/RGO composites, which show a reversible capacity of 235 mAhg-1 at 200 mAg-1 and 150 mAhg-1 at 1000 mAg-1 after 1000 cycles. The higher specific surface area of the new mesostructures and high conductive substrate (RGO nanosheets) result in excellent lithium storage performance, high-rate performance, and strong cycling stability of the TiO2-RGO composites.
Figure 4. Electrochemical measurements of pure TiO2 and TiO2-RGO composites.
Project production: Published an article (SCI), impact factor is 5.731.
Article: Mengmeng Zhen, Xiaohe Zhu, Xiao Zhang, Zhen Zhou and Lu Liu. Reduced graphene oxide-supported TiO2 fiber bundles with mesostructures as anode materials for lithium-ion batteries. Chemistry-A European Journal, 2015, 21, 14454–14459 (IF= 5.731)