Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Fabrication of TiO2 Coated Si Nano Particle using Silicon Sawing Sludge

실리콘 절삭 슬러지를 이용한 TiO2 코팅 나노 실리콘 입자의 제조

  • Seo, Dong Hyeok (Department of Energy Engineering, Dankook University) ;
  • Yim, Hyeon Min (Department of Energy Engineering, Dankook University) ;
  • Na, Ho Yoon (Department of Energy Engineering, Dankook University) ;
  • Kim, Won Jin (Department of Energy Engineering, Dankook University) ;
  • Kim, Ryun Na (Department of Energy Engineering, Dankook University) ;
  • Kim, Woo-Byoung (Department of Energy Engineering, Dankook University)
  • 서동혁 (단국대학교 에너지공학과) ;
  • 임현민 (단국대학교 에너지공학과) ;
  • 나호윤 (단국대학교 에너지공학과) ;
  • 김원진 (단국대학교 에너지공학과) ;
  • 김륜나 (단국대학교 에너지공학과) ;
  • 김우병 (단국대학교 에너지공학과)
  • Received : 2021.10.05
  • Accepted : 2021.10.08
  • Published : 2021.10.28
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Abstract

Here, we report the development of a new and low-cost core-shell structure for lithium-ion battery anodes using silicon waste sludge and the Ti-ion complex. X-ray diffraction (XRD) confirmed the raw waste silicon sludge powder to be pure silicon without other metal impurities and the particle size distribution is measured to be from 200 nm to 3 ㎛ by dynamic light scattering (DLS). As a result of pulverization by a planetary mill, the size of the single crystal according to the Scherrer formula is calculated to be 12.1 nm, but the average particle size of the agglomerate is measured to be 123.6 nm. A Si/TiO2 core-shell structure is formed using simple Ti complex ions, and the ratio of TiO2 peaks increased with an increase in the amount of Ti ions. Transmission electron microscopy (TEM) observations revealed that TiO2 coating on Si nanoparticles results in a Si-TiO2 core-shell structure. This result is expected to improve the stability and cycle of lithium-ion batteries as anodes.

Keywords

Acknowledgement

본 연구는 충남녹색환경지원센터 연구개발사업(No. 21-03-50-52-17)의 지원을 받아 수행된 연구입니다.

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