期刊
CARBON
卷 115, 期 -, 页码 134-146出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2017.01.005
关键词
-
资金
- 211 project of Anhui University
- National Natural Science Foundation of China [51272002]
- Anhui Provincial Key Scientific and Technological Project [1604a0902178]
- Key Project of Natural Science Research of Universities in Anhui Province [KJ2016A577]
- Foundation for Imported Leading Talent Teams in Universities and Colleges of Anhui Province
A ternary composite of graphene oxide/carbon dots/polypyrrole (GO/CDs/PPy) used as electrode active material for supercapacitor has been synthesized via in situ polymerization of GO/CDs with pyrrole under a mild condition. The CDs sandwiched between GO film and PPy layer can promote electron transportation in the ternary composite and thus reduce the internal resistance and charge transfer resistance of the electrode. Additionally, the CDs with large specific surface area can enhance the interfacial property among GO, CDs and PPy and increase the dielectric constant of the ternary composite. Notably, GO/CDs/PPy exhibits a specific capacitance of 576 F g(-1) at a current density of 0.5 A g(-1), and a super capacitor fabricated by two symmetric GO/CDs/PPy electrodes owns a high energy density of 30.1 Wh kg(-1) at a power density of 250 W kg(-1). More importantly, the as fabricated supercapacitor can keep an excellent cycle stability after 5000 cycles. In practice, a simple device assembled by five supercapacitors in series could power 59 light emitting diode indicators for more than 60 s after only charging for 17 s. This work demonstrates that CDs can play an important and unique role in improving performance of a hybrid electric double layer capacitor (EDLC)/pseudocapacitor. (C) 2017 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据