摘要
以竹材为原料,在高温Ar保护下制备了高比表面积超级电容器用竹炭材料。用XRD和SEM对所制竹炭进行了物相分析和形貌观察;用循环伏安、恒电流充放电和交流阻抗谱研究了炭化温度对所制超级电容器性能的影响。结果表明:所得竹炭为无定形结构,随着炭化温度的升高,竹炭中石墨微晶向有序态结构发展。炭化温度为500℃时,制备的竹炭电性能最佳。在125mA/g电流密度下的首次放电比电容为226F/g;即使在500mA/g的大电流密度下,其放电比电容仍高达184F/g,第1000次循环时其放电比电容为138F/g,每次循环电容衰减仅为0.046F/g。
High specific surface area bamboo charcoal(BC) electrode materials were prepared at different carbonization temperatures in Ar gas for supercapacitors.The structures and morphologies of the as-prepared powders were studied by SEM and XRD.The effect of carbonization temperatures on the capacitance characteristics of BC for supercapacitors was investigated by using cyclic voltammetry(CV),constant current charge-discharge and alternate current impedance spectroscopy.The results show the as-prepared BC is amorp...
出处
《电子元件与材料》
CAS
CSCD
北大核心
2010年第8期35-38,共4页
Electronic Components And Materials
基金
河南省科技厅基础与前沿技术研究项目(No102300410107)
河南省高等学校青年骨干教师资助计划项目(豫教高[2009]844号)
郑州市科技攻关项目(No0910SGYG23259)
郑州市金水区科技攻关项目(金科字[2009]35号(35))
关键词
超级电容器
竹炭
循环伏安
交流阻抗谱
supercapacitors
bamboo charcoal
cyclic voltammetry
alternate current impedance spectroscopy
