The synergistic effects of combining the high energy mechanical milling and wet milling on Si negative electrode materials for lithium ion battery

Shang Chieh Hou, Yuh Fan Su, Chia Chin Chang, Chih Wei Hu, Tsan Yao Chen, Shun Min Yang, Jow Lay Huang

研究成果: Article同行評審

21 引文 斯高帕斯(Scopus)

摘要

The submicro-sized and nanostructured Si aggregated powder is prepared by combinational routes of high energy mechanical milling (HEMM) and wet milling. Milled Si powder is investigated by particle size analyzer, SEM, TEM, XPS and XRD as well as the control ones. Its electrode is also investigated by in situ XRD and electrochemical performance. Morphology reveals that combining the high energy mechanical milling and wet milling not only fracture primary Si particles but also form submicro-sized Si aggregates constructed by amorphous and nanocrystalline phases. Moreover, XPS shows that wet milling in ethanol trigger Si[sbnd]O[sbnd]CH2CH3 bonding on Si surface might enhance the SEI formation. In situ XRD analysis shows negative electrode made of submicro-sized Si aggregated powder can effectively suppress formation of crystalline Li15Si4 during lithiation and delithiation due to amorphous and nanocrystalline construction. Thus, the submicro-sized Si powder with synergistic effects combining the high energy mechanical milling and wet milling in ethanol as negative electrode performs better capacity retention.

原文English
頁(從 - 到)111-120
頁數10
期刊Journal of Power Sources
349
DOIs
出版狀態Published - 2017

All Science Journal Classification (ASJC) codes

  • 可再生能源、永續發展與環境
  • 能源工程與電力技術
  • 物理與理論化學
  • 電氣與電子工程

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