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以太西无烟煤为前驱体,NaOH为活化剂制备电化学电容器电极材料。采用N2吸附法及电化学测试对活性炭的孔结构和电化学性能进行了表征。在1mol/L(C2H5)4NBF4/碳酸丙烯酯有机电解液体系中,研究了孔结构对活性炭电极材料的电化学性能的影响。结果表明:以NaOH为活化剂可制备出比表面积943mol/L～2479mol/L、比电容57F/g～167F/g的活性炭电极材料。活性炭电极材料的比电容不仅取决比表面积,而且与活性炭的孔径分布有关。孔径为2nm～3nm的中孔的存在可以有效降低电解液的扩散阻力,提高电极材料比表面积的利用率,从而使电容器的电化学性能得到增强。
Etch anthracite as precursor and NaOH as activator to prepare electrochemical capacitor electrode material. The pore structure and electrochemical properties of activated carbon were characterized by N2 adsorption and electrochemical tests. In the 1 mol / L (C2H5) 4NBF4 / propylene carbonate organic electrolyte system, the influence of pore structure on the electrochemical performance of the activated carbon electrode material was investigated. The results show that activated carbon electrode materials with specific surface area of 943mol / L ~ 2479mol / L and specific capacitance of 57F / g ~ 167F / g can be prepared with NaOH as activator. The specific capacitance of the activated carbon electrode material not only depends on the specific surface area but also the pore size distribution of the activated carbon. The existence of mesopore with pore size of 2nm ~ 3nm can effectively reduce the diffusion resistance of the electrolyte and improve the utilization of the specific surface area of the electrode material, so that the electrochemical performance of the capacitor is enhanced.