以柠檬酸锌为前体,利用碳化过程中产生的ZnO作为模板,制备了具有高比表面积和丰富孔道结构的多孔炭材料,系统研究了碳化温度对所得材料比表面积、孔体积及超级电容器性能的影响。结果表明:随着温度的升高,比表面积增大,孔容增大,多孔炭材料的电容性能也相应提高,在碳化温度为1273K时,所得炭材料(ZnC1273)的比表面积高达1763m2/g,孔容为3.08cm3/g。利用1.0mol/L四乙基四氟硼酸铵的乙腈溶液为电解质,所得炭材料作为电极应用于超级电容器,在0.5～20A/g高电流密度下的容量保持率为93.2%。
Porous carbons with high surface area and rich porosity were fabricated by a self-generated templating method,in which a commercial zinc citrate was used as starting material.Systematically studies were done to investigate the effect of carbonization temperature on the surface area,pore volume and supercapacitor performances.The obtained results shown that the surface area and pore volume as well as the supercapacitor performance would be enhanced as the carbonization temperature rises.When the carbonization temperature reached at 1273K,the derived sample (ZnC1273) owned a largest surface of 1763m2/g,large pore volume of 3.08cm3/g and achieved a ultrahigh capacity retention of 93.2% from current density of 0.5 to 20A/g in an organic electrolyte (1.0mol/Ltetraethyl tetrafluoroborate dissolved in acetonitrile).
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基金资助
江苏省第五期“333工程”科研资助项目(BRA2016306)
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