Raman characterization of pseudocapacitive behavior of polypyrrole on nanoporous gold

被引：63
|
作者：
Hou, Y. [1 ,2 ]
Zhang, L. [2 ]
Chen, L. Y. [2 ]
Liu, P. [2 ]
Hirata, A. [2 ]
Chen, M. W. [2 ,3 ,4 ,5 ]
机构：
[1] Taiyuan Univ Technol, Minist Educ, Key Lab Interface Sci & Engn Adv Mat, Taiyuan 030024, Peoples R China
[2] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan
[3] Japan Sci & Technol Agcy JST, CREST, Saitama 3320012, Japan
[4] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200030, Peoples R China
[5] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200030, Peoples R China
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2014年 / 16卷 / 08期
关键词：
CARBON-FIBER; COMPOSITE; FILM; CAPACITANCE; ELECTROCHEMISTRY; CONDUCTIVITY; SPECTROSCOPY; BATTERY; CATHODE; POLARON;
D O I：
10.1039/c3cp54497d
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：
The practical applications of high-capacitance polypyrrole (PPy) as an active material for electrochemical supercapacitors are mainly limited by their poor cycling stability. By utilizing nanoporous gold enhanced Raman scattering of PPy, we investigated ex situ and in situ the structural origins of the low electrochemical stability of PPy. This study provided direct evidence that the stability degradation of PPy is caused by the irreversible transition between oxidation and reduction states of PPy, which is associated with the permanent deformation of PPy molecular chains subjected to applied potentials.
引用
收藏
页码：3523 / 3528
页数：6
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