(93b) A Novel Binder to Improve the Electrochemical Performance of Si/C Anode of Lithium Batteries
- Conference: AIChE Annual Meeting
- Year: 2018
- Proceeding: 2018 AIChE Annual Meeting
- Group: Topical Conference: Innovations of Green Process Engineering for Sustainable Energy and Environment
Monday, October 29, 2018 - 8:25am-8:50am
In this short term, the novel binder (Alg-Î±- Li2C2O4) was prepared by mixing sodium alginate (Alg), Î±-cyclodextrin and Li2C2O4 with certain weight ratio. Thermal Gravimetric Analyzer (TGA) shows that Î±-cyclodextrin and Li2C2O4 have good thermal stability. Cycle performance tests show that cells with the composite binder has better performance than that of PVDF, or Alg. The composite binder can improve the discharge capacity of the Si/C half cells and improve the rate properties. Scanning electron microscope (SEM) is performed on the electrodes with different binders before and after cycling, indicates that the cycled Si/C electrode with Alg-Î±- Li2C2O4 binder is more stable than those formed when using PVDF and Alg binder. The Fourier transformation infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) measurements reveal that the hydrogen bonding is formed between the Si surface and the polar groups (-OH, -COOH) of Alg-Î±- Li2C2O4, endow the novel binder some self-healing capability.
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