Tin/graphite composites are prepared as anode materials for Li-ion batteries using a dry ball-milling process. The main experimental variables in this work are the ball milling time (0–8 h) and composition ratio (tin:graphite=5:95, 15:85, and 30:70 w/w) of graphite and tin powder. For comparison, a tin/graphite composite is prepared using wet ball milling. The morphology and structure of the different tin/graphite composites are investigated using X-ray diffraction, Raman spectroscopy, energy-dispersive X-ray spectroscopy, and scanning and transmission electron microscopy. The electrochemical properties of the samples are also examined. The optimal dry ball milling time for the uniform mixing of graphite and tin is 6 h in a graphite-30wt.%Sn sample. The electrode prepared from the composite that is dry-ballmilled for 6 h exhibits the best cycle performance (discharge capacity after 50th cycle: 308 mAh/g and capacity retention: 46%). The discharge capacity after the 50th cycle is approximately 112 mAh/g, higher than that when the electrode is composed of only graphite (196 mAh/g after 50th cycle). This result indicates that it is possible to manufacture a tin/graphite composite anode material that can effectively buffer the volume change that occurs during cycling, even using a simple dry ball-milling process.

Abstract
1. 서 론
2. 실험방법
3. 결과 및 고찰
4. 결 론
References

• 이태희(경상국립대학교 나노신소재융합공학과) | Tae-Hui Lee (Department of Materials Engineering and Convergence Technology, Gyeongsang National University)
• 홍현아(경상국립대학교 나노신소재융합공학과) | Hyeon-A Hong (Department of Materials Engineering and Convergence Technology, Gyeongsang National University)
• 조권구(경상국립대학교 나노신소재융합공학과) | Kwon-Koo Cho (Department of Materials Engineering and Convergence Technology, Gyeongsang National University)
• 김유영(경상국립대학교 융합기술공과대학 기계공학부) | Yoo-Young Kim (Department of Mechanical Engineering, Gyeongsang National University) Corresponding Author