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研究了引入的交联剂二乙烯基苯对作为锂离子二次电池负极材料的聚合物裂解碳性能的影响.结果表明交联剂引入到聚丙烯腈中后,在热处理过程中有利于该聚合物的碳化,导致层间距d002减少及石墨微晶尺寸增加;交联剂的固定作用使碳材料的有序性得到了提高;同时微孔数目也得到了增加.这些因素的影响导致了聚合物裂解碳的可逆储锂容量随交联剂的量的增加而提高.对于别的加聚物如聚4乙烯吡啶而言,同样也使所得到的聚合物裂解碳的可逆储锂容量得到了提高.最大可逆容量可达600mAh·g-1.
The effect of the introduced crosslinking agent, divinylbenzene, on the pyrolytic carbon properties of the polymer as a negative electrode material for lithium ion secondary batteries was investigated. The results showed that the introduction of the crosslinking agent into polyacrylonitrile favored the polymerization during the heat treatment The carbonization of the material led to the reduction of the interlayer spacing d002 and the increase of the size of the graphite crystallites. The fixing effect of the crosslinking agent increased the orderliness of the carbon materials and the number of micropores. The influence of these factors led to the formation of the polymer The reversible lithium storage capacity of the cracked carbon increases with the amount of cross-linking agent.For other addition polymers such as poly (4-vinylpyridine), the reversible lithium storage capacity of the resulting polymer to crack carbon is also increased The maximum reversible capacity of up to 600mAh · g-1.