期刊
CHEMICAL ENGINEERING JOURNAL
卷 374, 期 -, 页码 29-38出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.05.182
关键词
Supercapacitors; Crosslinked hybrid; Zn2GeO4/carbon nanotubes; Superior cyclic durability; Rapid electron transport
资金
- Union Project of the National Natural Science Foundation
- Guangdong Province [U1601214]
- Scientific and Technological Plan of Guangdong Province [2017A040405047, 2017B090901027, 2016A050503040, 2016B010114002]
- Key Projects of Guangdong Province Nature Science Foundation [2017B030311013]
- Special Funds for the Cultivation of Guangdong College Students' Scientific and Technological Innovation [Pdjha0126]
- Scientific and Technological Plan of Guangzhou City [201607010322, 201607010274]
- Innovation Project of Graduate School of South China Normal University [2017LKXM082]
- Extracurricular Scientific Research of South China Normal University [18WDGC03]
Currently, there are three primary obstacles to the development of high-performance supercapacitors: low electron conductivity of the electrode materials used, their poor ion-transport efficiency, and the unstable structure. Herein, to overcome these obstacles, one-dimensional Zn2GeO4 (ZGO) rods were grown within a carbon nanotube (CNT) framework using a simple one-step hydrothermal strategy for use as a supercapacitor electrode material. The crosslinked ZGO/CNT-O hybrid exhibits a large contact surface area with respect to electrolytes, contains abundant electrochemical active sites, and has short ion-diffusion paths. Further, the flexible CNTs act as superior connective bridges, promoting electron transmission and resulting in a stable structure. The ZGO/CNT-O hybrid showed a specific capacitance of 164.25 F/g at a current density of 1 A/g. It also displayed superior cycling durability, exhibiting a specific capacity of 120 F/g at a current density of 10 A/g, even after 200,000 cycles. A simple crosslinking strategy and prolonged cycle durability are demonstrated, which endow ZGO/CNT-O with potential for use in supercapacitor electrodes.
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