Carbon nanosheets as the electrode material in supercapacitors

被引:157
|
作者
Zhao, Xin [1 ]
Tian, Hui [2 ]
Zhu, Mingyao [2 ]
Tian, Kai [3 ]
Wang, J. J. [2 ]
Kang, Feiyu [4 ]
Outlaw, R. A. [2 ]
机构
[1] Engnova Labs LLC, Newport News, VA 23606 USA
[2] Coll William & Mary, Dept Appl Sci, Williamsburg, VA 23185 USA
[3] Jefferson Lab, Newport News, VA 23606 USA
[4] Tsinghua Univ, Dept Mat Sci, Beijing 100084, Peoples R China
关键词
Ultracapacitor; Supercapacitor; EDLC; Graphene; Carbon; Nanosheet; CHEMICAL-VAPOR-DEPOSITION; GRAPHENE; ULTRACAPACITORS; SHEETS;
D O I
10.1016/j.jpowsour.2009.06.004
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
Carbon nanosheets are comprised of 1-7 graphene layers that are predominantly vertically oriented with respect to a substrate. The thickness and morphology of the nanosheets can vary depending on the growth precursor and the substrate temperature. They have an ultra-low in-plane resistivity. The capacitance of carbon nanosheets was measured by cyclic voltammetry in a standard electrochemical three-electrode cell, which contains a platinum counter electrode and a standard mercury/mercurous sulfate reference electrode in 6 M H(2)SO(4) electrolyte. As a working electrode, the capacitance of carbon nanosheets per area was found to be 0.076 F cm(-2). A mathematical model was used to simulate the total possible capacitance of a virtual supercapacitor cell that contains carbon nanosheets as the electrode material and found to be 1.49 x 10(4)F. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:1208 / 1212
页数:5
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