马铃薯淀粉基微孔炭微球的制备及其电化学性能

doi:10.3866/PKU.WHXB201205221

物理化学学报 >> 2012, Vol. 28 >> Issue (08): 1906-1912.doi: 10.3866/PKU.WHXB201205221

马铃薯淀粉基微孔炭微球的制备及其电化学性能

付晓亭, 贾凡, 李文斌, 陈明鸣, 王成扬

天津大学化工学院, 绿色合成与转换教育部重点实验室, 天津 300072

收稿日期:2012-04-19 修回日期:2012-05-22 发布日期:2012-07-10
通讯作者: 王成扬 E-mail:cywang@tju.edu.cn
基金资助:
国家自然科学基金(51172160, 50902102)和国家高技术研究发展计划(863)(2011AA11A232)资助项目

Preparation and Electrochemical Performance of Microporous Carbon Microspheres Obtained from Potato Starch

FU Xiao-Ting, JIA Fan, LI Wen-Bin, CHEN Ming-Ming, WANG Cheng-Yang

Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China

Received:2012-04-19 Revised:2012-05-22 Published:2012-07-10
Contact: WANG Cheng-Yang E-mail:cywang@tju.edu.cn
Supported by:
The project was supported by the National Natural Science Foundation of China (51172160, 50902102), National High Technology Research and Development Program of China (863) (2011AA11A232).

摘要/Abstract

摘要：

以存在广泛的生物质原料马铃薯淀粉为前驱体, 通过磷酸对淀粉分解的促进作用和KOH活化法制备微孔炭微球材料. 采用77 K条件下的N₂吸附、扫描电子显微镜(SEM)分别对所得样品的孔隙结构、形貌特征进行表征. 采用傅里叶变换红外(FT-IR)光谱对磷酸促进淀粉分解的机理进行研究. 在6 mol·L^-1 KOH 电解质溶液中的电化学测试表明了所得微孔炭微球材料的优异电容特性. 在50 mA·g^-1的电流密度下, 电容量为363.6 F·g^-1. 此外, 该材料表现出了优异的倍率性能, 在扫描速率为300 mV·s^-1的条件下, 所得循环伏安(CV)曲线仍能保持良好的矩形形状. 电化学测试结果表明, 马铃薯淀粉基微孔炭微球材料在高性能电化学电容器的电极材料领域具有广阔的应用前景.

关键词: 马铃薯淀粉, 炭微球, 微孔, 高电容, 双电层电容器

Abstract:

Potato starch, as an extensive biomass with natural globular structure, had been used to prepare microporous carbon microspheres by the promoting effect of H₃PO₄ on the pyrolysis of starch and the activation of KOH. Pore structure of samples was characterized by nitrogen adsorption/desorption at 77 K, and the results showed that micropores were the major component in samples. The micropore structure of samples was believed that it would afford enough accessible surfaces for capacitive storage. After the observation using scanning electron microscopy (SEM), it could be seen that the globular shape of starch was completely remained in the following carbonization and activation procedures, which was believed that H₃PO₄ played an important role in the process. The following Fourier Transform Infrared Spectrometer (FT-IR) characterization confirmed that the acceleration effect of H₃PO₄ on starch pyrolysis. The results of electrochemical measurement in 6 mol·L^-1 KOH electrolyte showed that the product had excellent capacitive performances. Its specific capacitance was as high as 363.6 F·g^-1 at a current density of 50 mA·g^-1. And it exhibited excellent rate capability, which manifested that the cyclic voltammetry (CV) curve still remained rectangular and highly symmetric shape even when the scan rate reached as high as 300 mV·s^-1.All the results demonstrate that the potato starch-based microporous carbon is a promising electrode material for high performance electrochemical capacitors.

Key words: Potato starch, Carbon microspheres, Micropores, High capacitance, Double electric layer capacitor

MSC2000:

O646

付晓亭, 贾凡, 李文斌, 陈明鸣, 王成扬. 马铃薯淀粉基微孔炭微球的制备及其电化学性能[J]. 物理化学学报, 2012, 28(08): 1906-1912.

FU Xiao-Ting, JIA Fan, LI Wen-Bin, CHEN Ming-Ming, WANG Cheng-Yang. Preparation and Electrochemical Performance of Microporous Carbon Microspheres Obtained from Potato Starch[J]. Acta Phys. -Chim. Sin., 2012, 28(08): 1906-1912.

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马铃薯淀粉基微孔炭微球的制备及其电化学性能

Preparation and Electrochemical Performance of Microporous Carbon Microspheres Obtained from Potato Starch

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