Electrochemical Deposition of Polypyrrole/Sulfonated Graphene Composite Films
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- 作者：Anran Liu ; Chun Li ; Hua Bai ; Gaoquan Shi
- 刊名：Journal of Physical Chemistry C
- 出版年：2010
- 出版时间：December 30, 2010
- 年：2010
- 卷：114
- 期：51
- 页码：22783-22789
- 全文大小：406K
- 年卷期：v.114,no.51(December 30, 2010)
- ISSN：1932-7455
文摘
Composite films of sulfonated graphene (SG) and polypyrrole (PPy) were electrochemically deposited from the aqueous solutions containing pyrrole monomer, SG sheets, and dodecylbenzene sulfonic acid (DBSA). During the process of electrochemical polymerization, negatively charged SG sheets acted as a dopant of PPy. Thus, they were uniformly dispersed in the PPy matrices of resulting composites. The introduction of SG sheets improved the conductivity and electrochemical properties of PPy films. The composite films containing about 40% (by weight) SG showed a high specific capacitance of 285 F g−1 at a discharge rate of 0.5 A g−1. They also exhibited greatly improved electrochemical stability and rate performances.