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http://dx.doi.org/10.4150/KPMI.2021.28.5.423

Fabrication of TiO2 Coated Si Nano Particle using Silicon Sawing Sludge  

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)
Publication Information
Journal of Powder Materials / v.28, no.5, 2021 , pp. 423-428 More about this Journal
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
Si NPs; Recycling; $Si/TiO_2$; Core/Shell;
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