Fabrication of Sn-C composite electrodes by electrodeposition and their cycle performance for Li-ion batteries

摘要

To improve the cycle performance of the thick Sn electrode of 10 _m thickness, the Sn-C composite elec_trodes were fabricated by co-electrodeposition with two kinds of carbon particles which were the graph_ite and the acetylene black. The acetylene black particles were well dispersed in the Sn matrix more than the graphite particles. The carbon content in the Sn-C composite electrodes was measured about 12% of the graphite and 16% of the acetylene black particles. Even though carbon content of the Sn-acetylene black electrode was not significantly higher than that of the Sn-graphite electrode, the cycle performance of the Sn-acetylene black electrode was much higher than that of the Sn-graphite electrode. This dem_onstrates that the 'buffering effects' of well dispersed acetylene black particles was larger than that of the graphite particles. The cycle performance of the Sn-acetylene black electrode was significantly improved by the aging treatment.