采用含有多碳链结构的金属有机化合物,利用固相反应,得到亚微米尺寸的SnSbx合金颗粒,高度均匀地沉积在中间相碳微球(CMS)球体表面.合成的SnSbx/CMS复合材料做成扣式电池经电化学性能测试,电极可逆比容量超过430mAhg-1,相对于空白CMS电极(可逆比容量310mAhg-1)提高近40％,循环30次后容量维持在90％以上.结果表明:制备的复合电极不但具有较高的可逆比容量,而且能防止纯粹合金嵌脱锂过程产生的严重体积效应,从而提高电极循环性能.
Sub-micron size metallic particles were finely deposited on the surface of Carbonaceous Mesophase Spherules (CMS) by the decomposition and reduction of
organic metallic compound by solid-state reaction. Electrochemical cycling tests of coin cells show that the capacity retention at the 30th cycle is 90%, and special capacity is over 430 mAh g-1, improving about 40\% versus pure
CMS electrode. Obtained Alloy/CMS composite powders with high special capacity are used as anode materials for lithium ion cells and can avoid the drastic volume
change when lithium inserting into and extracting from Alloy matrix, and improve the cycle performance of electrode.
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