Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 17    No. 4    August 2007

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Effect of graphite content on electrochemical performance of Sn-SnSb/graphite composite powders
HUANG Ke-long(黄可龙), ZHANG Ge(张 戈), LIU Su-qin(刘素琴)

School of Chemistry and Chemical Engineering, Central South University,
Changsha 410083, China

Abstract:Sn-SnSb alloy was synthesized by reducing a aqueous solution containing Sn(Ⅱ) and Sb(Ⅲ) salts with NaBH4 in the presence of sodium citrate. The product was characterized by X-ray diffractometry(XRD) and scanning electron microscopy(SEM). Sn-SnSb/graphite composite powders were prepared by mechanical milling and the mass fraction of graphite was increased from 20% to 50%. The effect of graphite content on the electrochemical performance of Sn-SnSb/graphite composite electrode was investigated. The results show the increase of graphite content is in favor of enhancing the first charge-discharge efficiency and improving the cycle performance, but the capacity of the composite electrode decreases with increasing content of graphite.


Key words: Sn-SnSb/graphite; composite electrode; cycle performance; Li-ion battery

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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