期刊
IONICS
卷 25, 期 4, 页码 1523-1529出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-019-02892-y
关键词
Waste plastics; Lithium-ion batteries; Recycling; Silicon; Pyrolysis
资金
- National Nature Science Foundation of China [21701083, U1730136]
- Fundamental Research Funds for the Central Universities [2017XKQY062]
An economical and practical strategy is proposed for preparation of silicon/carbon nanofibers/carbon (Si/CNF/C) composite for lithium-ion batteries using self-prepared micron-sized silicon and waste high-density polyethylene (HDPE) as raw materials. The obtained Si/CNF/C composite is characterized by SEM, TGA, and XRD, as well as electrochemical characterization. Through a simple pyrolysis approach, pyrolyzed carbon and carbon nanofibers are obtained which acts as a carbon-conductive network and restrains the volumetric expansion of Si during Li-ion insertion/deinsertion processes. The obtained Si/CNF/C composite possesses high initial coulombic efficiency of 82.2% and a steady reversible capacity of 937mAhg(-1) (1685mAhg(-1) based on Si) after 100cycles at a current density of 100mAg(-1). The strategy proposed here provides a novel way to synthesize high value-added nanocarbon materials for LIBs by reutilization of waste plastics.
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