Polyaniline-MnO2 coaxial nanofiber with hierarchical structure for high-performance supercapacitors

被引：145
作者：
Jiang, Hao [1 ]
Ma, Jan [2 ]
Li, Chunzhong [1 ]
机构：
[1] E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China
[2] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
来源：
JOURNAL OF MATERIALS CHEMISTRY | 2012年 / 22卷 / 33期
基金：
中国国家自然科学基金;
关键词：
STORAGE DEVICES; ENERGY-STORAGE; NANOWIRES; NANOSTRUCTURES; BATTERIES; CELLS;
D O I：
10.1039/c2jm33249c
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We demonstrated the facile loading of ultrafine and loosened K-birnessite MnO2 floccules on the surface of polyaniline (PANI) nanofibers by simply soaking the polyaniline nanofibers in a KMnO4 aqueous solution for electrochemical energy storage applications. The as-prepared PANI-MnO2 coaxial nanofibers with optimal composition, when applied as an electrode, exhibited a high specific capacitance (383 F g(-1) at 0.5 A g(-1)) with good rate and cycling stability in 1 M Na2SO4 aqueous solution. Such intriguing electrochemical performance is mainly attributed to the synergistic effects of the combined pseudo-capacitive contributions from the core and shell. The present findings promoted the development of advanced electrode materials, exhibiting huge potential for supercapacitors.
引用
收藏
页码：16939 / 16942
页数：4
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