Tin-antimony sulfide nanocomposites were prepared via hydrothermal synthesis and a N2 reduction process for use as a negative electrode in a sodium ion battery. The electrochemical energy storage performance of the battery was analyzed according to the tin-antimony composition. The optimized sulfides exhibited superior charge/discharge capacity (770 mAh g-1 at a current density of 100 mA g-1) and stable lifespan characteristics (71.2 % after 200 cycles at a current density of 500 mA g-1). It exhibited a reversible characteristic, continuously participating in the charge-discharge process. The improved electrochemical energy storage performance and cycle stability was attributed to the small particle size, by controlling the composition of the tin-antimony sulfide. By optimizing the tin-antimony ratio during the synthesis process, it did not deviate from the solubility limit. Graphene oxide also acts to suppress volume expansion during reversible electrochemical reaction. Based on these results, tin-antimony sulfide is considered a promising anode material for a sodium ion battery used as a medium-to-large energy storage source.

Abstract
1. 서 론
2. 실험 및 분석 방법
3. 결과 및 고찰
4. 결 론
Acknowledgement
References

• 박소현(경상국립대학교 나노 ‧ 신소재공학부) | So Hyeon Park (School of Materials Science and Engineering, Gyeongsang National University)
• 정수환(경상국립대학교 나노 ‧ 신소재공학부) | Su Hwan Jeong (School of Materials Science and Engineering, Gyeongsang National University)
• 엄수윤(경상국립대학교 나노 ‧ 신소재공학부) | Suyoon Eom (School of Materials Science and Engineering, Gyeongsang National University)
• 이상준(경상국립대학교 나노 ‧ 신소재공학부) | Sang Jun Lee (School of Materials Science and Engineering, Gyeongsang National University)
• 김주형(경상국립대학교 나노 ‧ 신소재공학부) | Joo-Hyung Kim (School of Materials Science and Engineering, Gyeongsang National University) Corresponding author