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Improvement of Capacity Retention of Lithium Secondary Batteries Using Carbon-coated Silicon Particles as Anode Materials
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PVDF를 이용한 실리콘 입자의 탄소코팅 및 코팅된 입자를 음극재로 사용한 리튬이온 배터리의 용량 유지율 개선

논문 기본 정보

Type
Academic journal
Author
Junghyun Kim (전북대학교) Jin-Su Jung (제이솔루션) Gyo Woo Lee (전북대학교)
Journal
The Korean Society of Mechanical Engineers Transactions of the Korean Society of Mechanical Engineers - A Vol.45 No.5(Wn.428) KCI Accredited Journals SCOPUS
Published
2021.5
Pages
377 - 385 (9page)
DOI
10.3795/KSME-A.2021.45.5.377

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Improvement of Capacity Retention of Lithium Secondary Batteries Using Carbon-coated Silicon Particles as Anode Materials
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This study aimed to improve the charge/discharge capacity retention rate of lithium-ion batteries by coating carbon on silicon, an anode material, using polyvinylidene difluoride (PVDF) to prevent the expansion of silicon. PVDF was used as a precursor for coating carbon on silicon particles produced by milling a silicon mass. Accordingly, a lithium-ion coin cell was manufactured and evaluated to measure the improvement in its discharge capacity retention rate. The presence of a crystalline carbon layer on the silicon particles coated using PVDF as a precursor was observed through scanning electron microscopy, energy-dispersive X-ray spectroscopy, Raman spectroscopy, and transmission electron microscopy analyses. Through charge and discharge experiments, the capacity retention rate was determined to be 0.5% before the carbon coating of the silicon particles, as compared with the initial capacity. This value increased to 44.0% after the carbon coating. Thus, it was observed that the capacity retention rate of lithium-ion secondary batteries can be improved by modifying silicon through carbon coating using PVDF. In future studies, this carbon coating method will be optimized and applied to silicon oxides, which will be used as an anode material for lithium-ion batteries.
#Silicon Anode Materials(실리콘 음극재) #Lithium Ion Batteries(리튬이온 배터리) #Carbon Coating(탄소 코팅) #Capacity Retention(용량 유지) #PVDF(플루오르화 폴리비닐리덴)

Contents

초록
Abstract
1. 서론
2. 실험방법
3. 실험결과 및 고찰
4. 결론
참고문헌(References)

References (20)

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Megahed, S. and Ebner, W., 1995, “Lithium-Ion Battery for Electronic Applications,” J. Power Sources, Vol. 54, No. 1, pp. 155~162. google schola Scrosati, B., 2000, “Recent Advances in Lithium Ion Battery Materials,” Electrochimica Acta, Vol. 45, No. 15-16, pp. 2461~2466. google schola Fukuda, K., Kikuya, K., Isono, K. and Yoshio, M., 1997, “Foliated Natural Graphite as the Anode Material for Rechargeable Lithium-ion Cells,” J. Power Sources, Vol. 69, No. 1-2, pp. 165~168. google schola Jeon, D. H., 2018, “Electrochemical Performance of Lithium-Ion Battery according to Electrolyte Wettability in Porous Electrode,” Trans. Korean Soc. Mech. Eng. B, Vol. 42, No. 6, pp. 429~435. google schola Ashuri, M., He, Q. and Shaw, L. L., 2016, “Silicon as a Potential Anode Material for Li-Ion Batteries: Where Size, Geometry and Structure Matter,” Nanoscale, Vol. 8, No. 1, pp. 74~103. google schola

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