中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 二次活化对椰壳基活性炭电化学性能的影响 沈阳农业大学学报 2013,44 (1) 74-79
Position: Home > Articles > Effect of Coconut Shell-Based Activated Carbon Reactivation on Its Electrochemical Performances Journal of Shenyang Agricultural University 2013,44 (1) 74-79

二次活化对椰壳基活性炭电化学性能的影响

作  者：
耿新;李莉香;安百刚;朱小明;李剑萍
单  位：
辽宁科技大学材料电化学研究所;鞍钢环境监测站
关键词：
超级电容器;椰壳基活性炭;水蒸汽活化;铁催化;电化学容量
摘  要：
以椰壳为原料,采用CO2为活化剂制备椰壳基活性炭(AC-1),通过对AC-1依次进行水蒸汽和铁催化-水蒸汽二次活化,制得含有较高中孔比率的活性炭(AC-2、AC-3)。孔径分析结果表明:二次活化法显著提高活性炭(AC)的中孔比率,中孔比率由11.54%(AC-1)依次提高到75%(AC-2)和78%(AC-3)。电化学测试表明:提高AC的中孔比率,有利于提高循环伏安的响应电流密度、活性炭材料的导电性和电解液离子在活性炭孔道内输运能力。当放电电流密度为500mA.g-1时,3个样品的容量由140F.g-1(AC-1)依次提高到166F.g-1(AC-2)和240F.g-1(AC-3),容量保持率分别为68%(AC-1)、78%(AC-1)和80%(AC-3)。说明减少小微孔(<0.7nm),增加中孔,有利于提高放电容量以及容量保持率。
译  名：
Effect of Coconut Shell-Based Activated Carbon Reactivation on Its Electrochemical Performances
作  者：
GENG Xin1,LI Li-xiang1,AN Bai-gang1,ZHU Xiao-ming1,LI Jian-ping2(1.School of Chemical Engineering,University of Science and Technology Liaoning,Anshan Liaoning 114051,China;2.Station of Environment Monitor,Anshan Steel and Iron Co.,Anshan Liaoning 114005,China)
关键词：
supercapacitors;activated carbon;steam activation;iron catalyst;electrochemical capacitance
摘  要：
Activated carbon(AC) was prepared by CO2 activation of coconut shell,and then the ACs with higher mesopore ratio were obtained by steam activation and by impregnating iron catalyst followed by steam activation,respectively.The pore size distribution showed that the mesopore ratios of the ACs were significantly increased by reactivation with steam or catalyst,up to 75% and 78%,respectively.The electrochemical tests indicated that with the increase of the mesopore ratios of the ACs,the current densities were evidently enhanced through the cyclic voltammery test at 50mV.s-1 scan rate.The electrochemical impedance spectroscopy displayed that the conductivity and ion transport performance of the ACs were improved.At 500mA.g-1 current density,the capacitances of ACs were increased from 140F.g-1(AC-1) to 166F.g-1(AC-2) and 240F.g-1(AC-3),respectively.The capacitance retention ratios were 68%(AC-1),78%(AC-1) and 80%(AC-3),respectively.Results showed that the decrease of small micropores content(<0.7nm) and the increase of the mesopores content were favorable to improve the performances of the power discharge and the capacitance retention ratio.

相似文章

导出引用
计量
文章访问数: 12
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46