摘要
以高比表面积竹质活性炭作为双电层电容器的电极材料,采用恒流充放电、等效串联电阻、漏电流等方法分别测试了其在水性电解液和有机电解液中的电化学性能。结果表明,高比表面积竹基活性炭具有优异的能量储存特性、稳定的电化学特性和脉冲性能,在水性电解液中展示出优异的高频耦合特性,在水性和有机电解液中的比电容值分别为206F/g和133F/g。根据双膜态孔径分布理论可知,较大孔径的孔既可被水性电解液浸润也可被有机电解液浸润,较小孔径的孔则只能被水性电解液浸润。
The properties of high specific surface area activated carbon from bamboo as electrode materials in aqueous and organic electrolytes are evaluated respectively. Charge/discharge curves at constant current, equivalent series resistance（ESR） and leakage current are tested. The results show that the bamboo-based activated carbons have excellent power storation performance, stable electrochemical performance and impulse properties. Excellent high-frequency coupling performance is exhibited in aqueous electrolyte. The specific capacitance values in aqueous and organic electrolytes are respectively 206F/g and 133F/g. This can be explained by a bimodal pore size distribution, large pores accessible to he infiltrated by both electrolytes and small pores accessible only to be infiltrated by the aqueous electrolyte.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2010年第20期21-23,27,共4页
Materials Reports
基金
国家自然科学基金(50802017)
关键词
竹基活性炭
水性电解液
有机电解液
电容
bamboo-based activated carbon, aqueous electrolyte, organic electrolyte, capacitance
