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- Title
Preparation and electrochemical properties of graphene-supported Si-TiO<sub>2</sub> nanospheres as anode material for Li-ion batteries.
- Authors
Qiufen Wan; Wenyan Bi; Juan Miao; Mengwei Lu; Dafeng Zhang; Yumei Chen; Hong Yang
- Abstract
Graphene-supported Si-TiO2 (Si-Ti-GE) composites have been synthesized by a simple polymerization and sintering method. In the Si-Ti-GE composites, many small Si-TiO2 particles are scattered on the graphene sheet, which can mitigate the agglomeration of the material and further reduce the particle size. The initial discharge capacities of Si-TiO2, Si-Ti-GE-1, Si-Ti-GE-2, and Si- Ti-GE-3 are 336.9,337.2,339.8, and 356.6 mAh g-1 at the current density of 200 mA g-1, respectively. The discharge rate capacities of TiO2, Si-TiO2, and Si-Ti-GE-3 composites retain 57.5%, 41.7%, and 82.1% at the current density from 100 to 400 mA g-1, respectively. Therefore, the introduction of graphene not only could facilitate the Li+ diffusion and electron transport but also could make better electrical conductivity.
- Subjects
LITHIUM-ion batteries; ELECTROCHEMICAL electrodes; TITANIUM dioxide; POLYMERIZATION; SINTERING; AGGLOMERATION (Materials); ELECTRIC conductivity
- Publication
Surface & Interface Analysis: SIA, 2018, Vol 50, Issue 4, p488
- ISSN
0142-2421
- Publication type
Article
- DOI
10.1002/sia.6404