• 文献标题:   Polyaniline nanofiber sponge filled graphene foam as high gravimetric and volumetric capacitance electrode
  • 文献类型:   Article
  • 作  者:   PEDROS J, BOSCA A, MARTINEZ J, RUIZGOMEZ S, PEREZ L, BARRANCO V, CALLE F
  • 作者关键词:   graphene foam, polyaniline nanofiber sponge, hierarchical composite electrode, supercapacitor
  • 出版物名称:   JOURNAL OF POWER SOURCES
  • ISSN:   0378-7753 EI 1873-2755
  • 通讯作者地址:   Univ Politecn Madrid
  • 被引频次:   28
  • DOI:   10.1016/j.jpowsour.2016.03.041
  • 出版年:   2016

▎ 摘  要

A 3D hierarchical porous composite structure is developed via the controlled electrodeposition of a polyaniline nanofiber sponge (PANI-NFS) that fills the pores of a chemical vapor deposited graphene foam (GF). The PANI-NFS/GF composite combines the efficient electronic transport in the GF scaffold (with 100-500 gm pore size) with the rapid diffusion of the electrolyte ions into the high-specific surface-area and densely-packed PANI-NFS (with 100-500 nm pore size). The factor of 1000 in the pore hierarchy and the synergy between the materials, that form a supercapacitor composite electrode with an integrated extended current collector, lead to both very high gravimetric and volumetric capacitances. In particular, values of 1474 F g(-1) and 86 F cm(-3) for a GF filling factor of 11% (leading to an estimated value of 782 F cm(-3) for 100%), respectively, are obtained at a current density of 0.47 A g(-1). Moreover, the composite electrode presents a capacitance retention of 83% after 15000 cycles. This excellent behavior makes the PANI-NFS/GF composite electrodes very attractive for high-performance supercapacitors. (C) 2016 Elsevier B.V. All rights reserved.