Polymeric carbon encapsulated Si nanoparticles from waste Si as a battery anode with enhanced electrochemical properties
| Autor: | Chuanhai Gan, Pengfei Liu, Yingkuan Liu, Liuqing Huang, Bang Liu, Qingshui Xie, Chengkun Zhang, Xuetao Luo, Weidong Wen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Battery (electricity)
Materials science Carbonization General Chemical Engineering Composite number chemistry.chemical_element Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Anode chemistry Chemical engineering Lithium 0210 nano-technology Current density |
| Zdroj: | Electrochimica Acta. 307:107-117 |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2019.03.186 |
| Popis: | A facile method is proposed to prepare Si nanoparticles encapsulated in polymeric carbon (SiNPs-PC) as anode materials for lithium ion batteries. Si nanoparticles (SiNPs) with average diameter of 125 nm are prepared. Under the aid of silane coupling agent, SiNPs are coated with phenolic resin, and SiNPs-PC composite is prepared after carbonization engineering. The SiNPs-PC anode with 63.7 wt% of Si exhibits greatly strengthened electronic conductivity and relatively stable electrode interface. The SiNPs-PC anode delivers a reversible capacity of 984 mA h g−1 with 84% capacity retention after 100 cycles at a current density of 0.1 A g−1 and 710 mA h g−1 after 800 cycles at a current density of 1 A g−1. When cycled at a very larger current density of 10 A g−1, a decent reversible capacity of 404 mA h g−1 can be harvested, which is still higher than the theoretical capacity of commercial graphite anode. The electrochemical performances are systematically discussed on microstructure and morphology of electrode materials. The feedstock of SiNPs is recycled from waste Si, and the preparation of SiNPs-PC composite is facile, cost-effective and environmentally benign, which shows great potential of industrial production. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect