A chemical deposition was supposed to be an efficient method in preparation of nano-sized Sn/ MWNTs . The nanocomposites of MWNTs and Sn/ MWNTs were both used as anodes of lithium ion battery. The special capacities and coulomb efficiencies of Sn/ MWNTs were studied by means of electrochemical methods. The coating of Sn on MWNTs observed by TEM was amorphous and nano-sized. The reversible capacity of Sn/ MWNTs , which was much larger than that of MWNTs , was 824 mAh/ g in the 1 st charge and discharge cycle. The coulomb efficiency of Sn/ MWNTs in the 1 st cycle was increased by 16% compared with that of MWNTs . The additional Sn, which was 37wt% of total Sn/ MWNTs' weight, introduced the additional reversible lithiation capacity at least 250 mAh/g in the 40 charge and discharge cycles. The dispersing degree of Sn on MWNTs was the main reason for the influence of the electrochemical performance of the Sn/ MWNTs. Sn/ MWNTs is proved to be a promising candidate as an anode of lithium ion battery.
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