多孔炭的孔结构与电化学性能的关系

The relation between pore structure and electrochemical performance of porous carbon

研究了化学活化法制备的多孔炭的孔结构与电化学性能之间的关系,结果表明:在高浸渍比下可以制得中孔炭材料。在500℃下活化的活性炭循环性能比较差,但经900℃高温处理后,循环性能得到改善。提出并证实了"分组线性拟合法"在求多孔炭的有效比表面积及表面积比电容上的合理性。多孔炭在1 mol/L Et4NBF4/PC电解液中形成双电层的有效最小孔径为2.0 nm。

The relation between pore structure and electrochemical performance of porous carbon prepared by the chemical activation method was studied. The results showed that the mesopore carbon material could be prepared at high impregnation ratio. The cycle performance of the carbon activated at 500 ℃ was poor. It was improved by high temperature treatment at 900 ℃. The rationality of ＂Fit linear method by grouping＂ was proposed and proved to obtain the effective specific surface area and surface specific capacitance of the porous carbon. The effective minimum pore size that could form electric double layer was confirmed to be 2.0 nm for the porous carbon in 1 mol/L Et4NBF4/PC electrolyte.