Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Synthesis and Electrochemical Properties of Sn-based Anode Materials for Lithium Ion Battery by Electrical Explosion Method

전기 폭팔법에 의한 Sn계 리튬이차전지용 음극 분말의 제조 및 전기 화학적 특성

  • Hong, Seong-Hyeon (Powder Materials Technology Group, KIMS, Korea Institute of Machinery and Materials)
  • 홍성현 (한국기계연구원 부설 재료연구소 분말기술 연구그룹)
  • Received : 2011.06.21
  • Accepted : 2011.08.22
  • Published : 2011.08.30
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Abstract

Nano-sized Sn powder was prepared by pulsed wire evaporation method. The Sn powder and carbon black were charged in jar and ball milled. The milling time was varied with 10 min., 1h, 2h, and 4h, respectively. The milled powders were dried and the shape and size were observed by FE-SEM. Nano-sized Sn powders were plastic-deformed and agglomerated by impact force of balls and heat generated during the SPEX milling. The agglomerated Sn powder also consisted of many nano-sized particles. Initial discharge capacities of milled Sn electrode powders with carbon powder were milled for 10 min., 1h, 2h, and 4h were 787, 829, 827, and 816 mAh/g, respectively. After 5 cycle, discharge capacities of Sn electrode powders with carbon powder milled for 10 min., 1h, 2h, and 4h decreased as 271, 331, 351, and 287 mAh/g, respectively. Because Sn electrode powders milled for 2h constist of uniform and fine size, the cyclability of coin cell made of this powders is better than others.

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References

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