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电化学电容器已经成为极具潜力的可满足高功率需求的储能系统器件.多孔炭具有大比表面积、高导电性、化学惰性、廉价及可调孔结构等优势,因此成为电化学电容器最为常用的电极材料.本文报道由微孔棒状羟基磷灰石为模板及蔗糖为碳源合成的新型具有层次孔道结构的孔炭材料的电化学电容器的性能.采用X射线衍射分析仪、扫描电子显微镜、透射电子显微镜、X射线光电子能谱及BET表面分析仪表征了合成的多孔炭的形貌及表面特性.采用循环伏安法、交流阻抗图谱分析及恒流充放电评价多孔炭材料在1 mol·L~(-1)硫酸中的电化学电容性能.多孔炭具有高的比表面积(719.7 m~2·g~(-1))和大的孔容(1.32 cm~3·g~(-1)),其无序的孔道由任意分布的微孔、坍塌的中孔及类模板形状的相互交织的棒状中孔组成.随着炭化温度的增加,微孔及棒状中孔的密度随之降低,在炭化温度高达900℃时,孔径分布图上出现了三个峰.正是由于这些特殊的结构特征,山900℃炭化得到的多孔炭制成的电极展示出很好的电化学电容性能.
Electrochemical capacitors have become potential storage devices for high-power applications.Porous carbon is the most commonly used electrochemical capacitor due to its advantages of large specific surface area, high conductivity, chemical inertness, low cost and adjustable pore structure Of the electrode material.In this paper, we report the electrochemical capacitor performance of a novel porous carbon material with hierarchical pore structure synthesized from microporous hydroxyapatite as template and sucrose as carbon source.Using X-ray diffraction analyzer, scanning electron microscopy, The morphology and surface properties of the synthesized porous carbon were characterized by transmission electron microscopy, X-ray photoelectron spectroscopy and BET surface analysis. The cyclic voltammetry, AC impedance spectroscopy analysis and constant current charge / L ~ (-1) Sulfuric acid.The porous carbon has high specific surface area (719.7 m ~ 2 · g ~ (-1)) and large pore volume (1.32 cm ~ 3 · g ~ (-1) )), Its disordered pore channels are composed of arbitrarily distributed micropores, collapsed mesopores, and intercalated rod-like mesopores in the shape of a template-like shape. As the carbonization temperature increases, the density of micropores and rod mesopores decreases , At the carbonization temperature And up to 900 ℃, there are three peaks of pore size distribution. Because of these special structural features, exhibit Hill electrode 900 ℃ obtained carbonized porous carbon made from a good performance of electrochemical capacitors.