Coin-cell Supercapacitors Based on CVD Grown and Vertically Aligned Carbon Nanofibers (VACNFs)
Artikel i vetenskaplig tidskrift, 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

Författare

Muhammad Amin

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Andrea Boschin

Chalmers, Fysik, Kondenserade materiens fysik

Du Hyun Lim

Chalmers, Fysik, Kondenserade materiens fysik

Vincent Desmaris

Smoltek AB

Patrik Johansson

Chalmers, Fysik, Kondenserade materiens fysik

Peter Enoksson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

International Journal of Electrochemical Science

1452-3981 (ISSN)

Vol. 12 7 6653-6661

Styrkeområden

Informations- och kommunikationsteknik

Nanovetenskap och nanoteknik

Transport

Produktion

Materialvetenskap

Ämneskategorier

Övrig annan teknik

Elektroteknik och elektronik

Nanoteknik

Infrastruktur

Nanotekniklaboratoriet

DOI

10.20964/2017.07.46