Ni^(2+)离子掺杂聚苯乙烯阳离子交换树脂碳化产物结构和性能

Elements and Structure as Well as the Electrochemical Property of the Carbon Derived from Ni2+ Ion Adulterating Polystyrene Canon Exchange Resin

制备了Ｎｉ^(２＋)离子掺杂的聚苯乙烯阳离子交换树脂，并对其进行碳化处理，分析了树脂 碳化产物的组成和结构，同时还考察了树脂碳化产物作为二次锂离子电池碳电极材料时的电 化学性能．实验结果表明：Ｎｉ～（２＋）离子掺杂的聚苯乙烯阳离子交换树脂碳化产物与相同条件下处 理的未掺杂离子的树脂碳化产物相比，氢、氧含量有所提高，而硫含量则有所降低；Ｎｉ^（２＋）离子掺 杂提高了聚苯乙烯阳离子交换树脂碳化产物的石墨化程度，并且促进了碳化产物中层片石墨 微晶结构的增长和有序排列；Ｎｉ^（２＋）离子掺杂有效的提高了树脂碳化产物作为锂离子电池碳负极 材料的电化学性能．与未掺杂离子的树脂碳化产物相比，Ｎｉ^（２＋）离子掺杂的树脂碳化产物组装的 锂离子电池充放电容量平均提高了约２０（ｍＡ·ｈ）／ｇ，同时还显著降低了电池第一次充放电时的 不可逆性．

The polystyrene canon exchange resin were exchanged by Ni2+ ions and then were carbonized to make resin carbon. The elements and structure of the resin carbon were analyzed, and the electrochemical properties of the resin carbon as the electrode of the lithium ion cell were also investigated. The test shown that the element contents of the hydrogen and oxygen were increased and the one of the sulpher was fall for the resin carbon material derived from Ni2+ ion adulterating polystyrene canon exchange resin to compare with the one from the no Ni2+ ion adulterating resin. The test also found that it is to increase the graphite degree of the resin carbon, to accelerate the bigger stratum graphite minicrystal structure to form, as well as to be prone to array in the uprightness direction of the strata graphite minicrystal for the Ni2+ ion adulterating resin. The electrochemical test also proved that the lithium ion cell, was assembled by the resin carbon derived from Ni2+ ion adulterating resin, had much better electrochemical property than the one from no Ni2+ ion adulterating resin, and the capacity of the charge and discharge of the cell was increased about 20 (mA .h)/g in average, at one time, the first charge and discharge irreversibility of the lithium ion cell was fall evidently.