Extracting lignin-SiO2 composites from Si-rich biomass to prepare Si/C anode materials for lithium ions batteries

Yixin Li, Li Liu, Xiaoyang Liu, Yi Feng, Beichen Xue, Liyun Yu, Lijie Ma, Yanchao Zhu, Yimin Chao, Xiaofeng Wang

Research output: Contribution to journalArticle

Abstract

The comprehensive utilization of Si-rich biomass is restrained by macromolecular lignin and a large amount of ash. In this study, rice husks (RHs) are treated as a representative by alkali extraction and acid precipitation, and the obtained lignin-SiO2 composite is modified by carbonazation, ball milling, magnesiothermic reduction and additives. Through these processes, a Si/C composite with excellent electrochemical properties is obtained and performs stable cycling performance with high specific capacity retention of 572 mA h g−1 at 1 A g−1 after 1000 cycles. This introduced method provides a potential for utilizing Si-rich biomass comprehensively and preparing desirable Si/C anode materials from Si-rich biomass derived lignin-SiO2 composites.
Original languageEnglish
Article number124331
JournalMaterials Chemistry and Physics
Volume262
Early online date1 Feb 2021
DOIs
Publication statusPublished - Apr 2021

Keywords

  • Alkali extraction
  • Lignin-SiO composites
  • Si-rich biomass
  • Si/C anode materials

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