Coin-cell Supercapacitors Based on CVD Grown and Vertically Aligned Carbon Nanofibers (VACNFs)
Journal article, 2017

Complete supercapacitors (SCs) comprising vertically aligned carbon nanofibers (VACNFs) as electrode materials have been assembled as coin-cells. The VACNFs were grown directly onto the current collector by direct current plasma enhanced chemical vapor deposition (DC-PECVD), thereby providing excellent contact with the current collector, but also eliminating the need of any binder. The vertical alignment facilitates fast ion transport and the electrolyte to access the entire surface of the CNFs. The morphology of the VACNFs was evaluated by scanning electron microscopy (SEM), while the performance was assessed by several methods: cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and device related cycling by galvanostatic charge/discharge. The capacitance, 3.64 mF/cm2 , is >15 times higher than the capacitance of a coin-cell without CNFs and the cyclic performance shows these proof-of-concept SCs to retain >80% of the capacitance after 2000 full charge/discharge cycles. The direct growth of VACNFs as electrodes at the current collector opens pathways for SC production using existing coin-cell battery production technology.

VACNF

supercapacitor

PECVD

coin-cell

Author

Muhammad Amin

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Andrea Boschin

Chalmers, Physics, Condensed Matter Physics

Du Hyun Lim

Chalmers, Physics, Condensed Matter Physics

Vincent Desmaris

Smoltek AB

Patrik Johansson

Chalmers, Physics, Condensed Matter Physics

Peter Enoksson

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

International Journal of Electrochemical Science

1452-3981 (ISSN)

Vol. 12 7 6653-6661

Areas of Advance

Information and Communication Technology

Nanoscience and Nanotechnology (2010-2017)

Transport

Production

Materials Science

Subject Categories

Other Engineering and Technologies not elsewhere specified

Electrical Engineering, Electronic Engineering, Information Engineering

Nano Technology

Infrastructure

Nanofabrication Laboratory

DOI

10.20964/2017.07.46

More information

Latest update

9/21/2018