静电纺丝法制备多孔纳米炭纤维及其电化学性能研究  

The electrochemical performance of porous carbon nanofibers produced by electrospinning

作　　者：刘双[1,2] 宋燕[1] 马昌[1,2] 史景利[1] 郭全贵[1] 刘朗[1] 

机构地区：[1]中国科学院炭材料重点实验室,中国科学院山西煤炭化学研究所,山西太原030001 [2]中国科学院研究生院,北京100049

出　　处：《新型炭材料》2012年第2期129-134,共6页New Carbon Materials

基　　金：国家自然科学基金(50602046);山西省自然科学基金(2007011075);中国科学院山西煤炭化学研究所杰出青年人才基金~~

摘　　要：分别以聚乙烯醇(PVA)/热固性酚醛树脂(PF)/碳酸钾(K2CO3)和PVA/PF的水溶液为纺丝原液,通过静电纺丝、固化和炭化处理制得多孔纳米炭纤维。利用扫描电子显微镜(SEM)、低温氮气吸脱附等对所制多孔炭纳米纤维进行表征,并将所制多孔炭纤维作为模拟电容器电极材料,利用循环伏安和恒电流充放电进行了电化学性能测试。结果表明:纺丝原液中加入K2CO3后所制多孔纳米炭纤维的比表面积增大(从564 m.2g-1提高到668 m.2g-1),电化学性能提高(在电流密度为0.2 A.g-1的情况下,比电容由165 F.g-1提高到178 F.g-1)。Porous carbon nanofibers were prepared by electrospinning of mixed solutions of polyvinylalcohol/phenol formaldehyde and polyvinylalcohol/phenol formaldehyde/potassium carbonate,followed by stabilization and carbonization.The microstructure of the samples was studied by SEM and N2 adsorption/desorption.The electrochemical performance of these porous carbon nanofibers as electrodes of electrical double layer capacitors was investigated by cyclic voltammetry and constant current charge/discharge cycling.Results showed that the BET surface areas of as-prepared porous carbon nanofibers with and without potassium carbonate were 668 and 564 m2 · g-1,and their specific capacitances were 178 and 165 F · g-1 at a current density of 0.2 A · g-1,respectively.

关 键 词：静电纺丝 多孔纳米炭纤维 酚醛树脂 碳酸钾 电化学性能 

分 类 号：TQ342.742[化学工程—化纤工业]