An ultrahigh volumetric capacitance of squeezable three-dimensional bicontinuous nanoporous graphene

H-J Qiu; L Y Chen; Y Ito; J L Kang; X W Guo; P Liu; H Kashani; A Hirata; T Fujita; M W Chen

doi:10.1039/c5nr08852f

An ultrahigh volumetric capacitance of squeezable three-dimensional bicontinuous nanoporous graphene

Nanoscale. 2016 Nov 3;8(43):18551-18557. doi: 10.1039/c5nr08852f.

Authors

H-J Qiu¹, L Y Chen², Y Ito², J L Kang², X W Guo², P Liu², H Kashani², A Hirata², T Fujita², M W Chen³

Affiliations

¹ WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan. mwchen@wpi-aimr.tohoku.ac.jp and School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China.
² WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan. mwchen@wpi-aimr.tohoku.ac.jp.
³ WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan. mwchen@wpi-aimr.tohoku.ac.jp and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China and CREST, Japan Science and Technology Agency, Saitama 332-0012, Japan.

PMID: 27782251
DOI: 10.1039/c5nr08852f

Abstract

Graphene with a large specific surface area and high conductivity has a large specific capacitance. However, its volumetric capacitance is usually very low because the restacking of 2D graphene sheets leads to the loss of the large ion-accessible surface area. Here we report squeezable bicontinuous nanoporous nitrogen-doped graphene, which is extremely flexible and can tolerate large volume contraction by mechanical compression without the face-to-face restacking occurring. The compressed nanoporous N-doped graphene with a large ion accessible surface area and high conductivity shows an ultrahigh volumetric capacitance of ∼300 F cm^-3 together with excellent cycling stability and high rate performance.