为得到高电容特性的超级电容器电极材料,以廉价的可溶性淀粉为碳源采用配位-热解法制备了纳米级多孔石墨化碳电极材料.分别利用透射电镜(TEM)、X射线衍射(XRD)、拉曼光谱(Raman)和 N2吸附-脱附(BET)等测试手段对材料的微观结构进行表征,结果表明,合成材料具有较大的比表面积(1187 m2/g)和高的石墨化程度.并对合成材料进行了电化学性能测试,测试结果说明,该材料展示了优异的电容特性,在1A/g 时,其电容高达249 F/g,5000次循环后,其比电容仍为初始电容的99．97％.当以此材料为电极组装成电容器器件时,在功率密度为10500 W/kg下其能量密度仍为46．79 Wh/kg.因此,这种方法制备的纳米级多孔石墨化碳是一种有潜力的超电材料.
To obtain excellent electrode material with high capacitive property,the nanoscale porous graphite carbon was prepared via a sample coordination-pyrolysis method from renewable biomass starch.The nanostruc-ture of the PGC-based materials were characterized by XRD,Raman,TEM and BET methods.The result ex-hibits that PGC has high BET surface area (SBET=1 187 m2/g)and superior graphitization.While being adopted as a supercapacitor electrode,PGC shows excellent electrochemical performance:a high specific capacitance of 249 F/g,outstanding cycle durability over 99.97% after 5 000 cyles,an high energy density of 46.79 Wh/kg at a high power density of 10 500 W/kg.Thus,the synthesized PGC material was very promising as an electrode material for high-power supercapacitors.
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