title: Highly Flexible Freestanding Porous Carbon Nanofibers for Electrodes Materials of High-Performance All-Carbon Supercapacitors.
abstract: Highly flexible porous carbon nanofibers (P-CNFs) were fabricated by electrospining technique combining with metal ion-assistant acid corrosion process. The resultant fibers display high conductivity and outstanding mechanical flexibility, whereas little change in their resistance can be observed under repeatedly bending, even to 180°. Further results indicate that the improved flexibility of P-CNFs can be due to the high graphitization degree caused by Co ions. In view of electrode materials for high-performance supercapacitors, this type of porous nanostructure and high graphitization degree could synergistically facilitate the electrolyte ion diffusion and electron transportation. In the three electrodes testing system, the resultant P-CNFs electrodes can exhibit a specific capacitance of 104.5 F g(-1) (0.2 A g(-1)), high rate capability (remain 56.5% at 10 A g(-1)), and capacitance retention of ∼94% after 2000 cycles. Furthermore, the assembled symmetric supercapacitors showed a high flexibility and can deliver an energy density of 3.22 Wh kg(-1) at power density of 600 W kg(-1). This work might open a way to improve the mechanical properties of carbon fibers and suggests that this type of freestanding P-CNFs be used as effective electrode materials for flexible all-carbon supercapacitors.
authors.affiliation: School of Physical Science and Technology, Lanzhou University , Lanzhou 730000, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Liu
authors.affiliation: School of Physical Science and Technology, Lanzhou University , Lanzhou 730000, China.
authors.forename: Jinyuan
authors.initials: J
authors.lastname: Zhou
authors.affiliation: School of Physical Science and Technology, Lanzhou University , Lanzhou 730000, China.
authors.forename: Lulu
authors.initials: L
authors.lastname: Chen
authors.affiliation: School of Physical Science and Technology, Lanzhou University , Lanzhou 730000, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.affiliation: School of Physical Science and Technology, Lanzhou University , Lanzhou 730000, China.
authors.forename: Wenbin
authors.initials: W
authors.lastname: Fu
authors.affiliation: School of Physical Science and Technology, Lanzhou University , Lanzhou 730000, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Zhao
authors.affiliation: School of Physical Science and Technology, Lanzhou University , Lanzhou 730000, China.
authors.forename: Yufang
authors.initials: Y
authors.lastname: Ma
authors.affiliation: School of Physical Science and Technology, Lanzhou University , Lanzhou 730000, China.
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Pan
authors.affiliation: School of Physical Science and Technology, Lanzhou University , Lanzhou 730000, China.
authors.forename: Zhenxing
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: School of Physical Science and Technology, Lanzhou University , Lanzhou 730000, China.
authors.forename: Weihua
authors.initials: W
authors.lastname: Han
authors.affiliation: School of Physical Science and Technology, Lanzhou University , Lanzhou 730000, China.
authors.forename: Erqing
authors.initials: E
authors.lastname: Xie
keywords: electrospinning; flexible; graphitization; porous carbon nanofibers; supercapacitors