硫化聚氯乙烯正极材料的研究  

The research of PVC sulfide cathode material

作　　者：徐国祥[1] 其鲁[1] 闻雷[1] 

机构地区：[1]北京大学化学与分子工程学院应用化学系,北京100871

出　　处：《电池》2005年第3期178-179,共2页Battery Bimonthly

摘　　要：合成了三(四)硫化聚氯乙烯(3SPVC及4SPVC)。通过红外光谱分析,确定其官能团结构重复单元为CH2CHSnCHCH2(n为3或4)。3SPVC及4SPVC的平均粒度分别为8 83μm和7 21μm,硫元素含量达到48 1%及50 6%。用SEM观察材料的表面形貌。结合循环伏安与充放电测试,对材料的电化学性能进行了评估。结果表明:3SPVC及4SPVC分别具有233 8mAh/g和301 3mAh/g的首次放电容量,经过10次循环后,放电容量保持在200 5mAh/g与217 0mAh/g。<Abstrcat>Poly (vinyl chloride) trisulfides (tetrasulfides) (PVC sulfides,3SPVC and 4SPVC) were synthesized and their function groups repeating unit of CH_2CHS_nCHCH_2 (n as 3 or 4) were ascertained by IR test. Granularity analysis showed the particle size of 3SPVC and 4SPVC was 8.83 μm and 7.21 μm, the content of sulfur was 48.1% and 50.6%. SEM was used to study the surface morphology of the materials. The electrochemistry properties of materials were evaluated by CVs and charge-discharge test. The testing results showed that the initial discharge capacity of 3SPVC and 4SPVC was 233.8 mAh/g and 301.3 mAh/g, after 10 cycles,the capacity could retain at 200.5 mAh/g and 217.0 mAh/g.

关 键 词：硫化聚氯乙烯 正极 二次锂电池 

分 类 号：TM911[电气工程—电力电子与电力传动]