Compressed porous graphene particles for use as supercapacitor electrodes with excellent volumetric performance.
This work presents a new class of porous graphene particles with a three-dimensional microscale network and an ultrahigh specific surface area (2590 m(2) g(-1)), which is obtained by the KOH activation of a compact graphene hydrogel. As supercapacitor electrodes, such porous graphene particles show high compressibility and little capacitance loss when subjected to a compressive force up to 40 MPa, yielding an excellent volumetric performance with an ionic liquid electrolyte. Such carbon materials show great promise for applications needing high volumetric energy.
Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China. qhyangcn@tju.edu.cn jluo@tju.edu.cn.
Huan
H
Li
Ying
Y
Tao
Xiaoyu
X
Zheng
Zhengjie
Z
Li
Donghai
D
Liu
Zhao
Z
Xu
Chong
C
Luo
Jiayan
J
Luo
Feiyu
F
Kang
Quan-Hong
QH
Yang