Directly conversion the biomass-waste to Si/C composite anode materials for advanced lithium ion batteries
| Autor: | Mingtao Xiao, Wang Hongrui, Yu Dai, Xiongwei Wu, Naimei Tu, Xian-Xiang Zeng, Qiang Ma, Guozhu Ma, Hui Guo |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Magnesium Composite number Nanoparticle chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Anode symbols.namesake chemistry Chemical engineering symbols Lithium 0210 nano-technology Raman spectroscopy Carbon |
| Zdroj: | Chinese Chemical Letters. 32:5-8 |
| ISSN: | 1001-8417 |
| Popis: | The necessity to explore high-efficiency and high-value utilization strategy for biomass-waste is desirable. Herein, the strategy for direct conversion biomass-waste (rice husks) to Si/C composite structure anode was built. The Si/C composite materials were successfully obtained via the typical thermal reduction with magnesium, and the Si nanoparticle was uniformly embedded in carbon frame, as revealed by Raman, X-ray diffraction (XRD) and transmission electron microscope (TEM) measurement. The carbon structure among rice husks was effectively used as a protective layer to accommodate the volume variation of Si anode during the repeated lithiation/delithiation process. Benefitting from the structure design, the batteries show a superior electrochemical stability with the capacity retention rate above 90% after 150 cycles at the charge/discharge rate of 0.5 C (1 C = 600 mAh/g), and hold a high charge capacity of 420.7 mAh/g at the rate of 3 C. Therefore, our finding not only provides a promising design strategy for directly conversion biomass-waste to electrochemical storage materials but broadens the high-efficiency utilization method for other biomass by-products. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect