Hydrothermal ammoniated treatment of PAN-graphite felt for vanadium redox flow battery
- 20 April 2011
- journal article
- research article
- Published by Springer Science and Business Media LLC in Journal of Solid State Electrochemistry
- Vol. 16 (2), 579-585
- https://doi.org/10.1007/s10008-011-1383-y
Abstract
A novel method of hydrothermal ammoniated treatment on the polyacrylonitrile (PAN)-based graphite felt for vanadium redox flow battery was developed. The graphite felt was treated in a Teflon-lined stainless steel autoclave for different time at 180 °C. The content of nitrogen in the PAN graphite felt changed from 3.803% to 5.367% by adjusting treatment time to 15 h in ammonia solution, while FT-IR results indicated that nitrogenous groups were introduced. The electrochemical properties of these graphite felts were characterized by cyclic voltammetry, electrochemical impedance spectroscopy, as well as cell charge and discharge tests. The energy efficiency of the treated graphite felt reached 85% at a current density of 20 mA/cm2. The corresponding coulombic efficiency and voltage efficiency were 95.3% and 75.1%, respectively. The improvement of the electrochemical properties for the treated graphite felt might be attributed to the increase of polar nitrogenous groups of carbon fiber surface, which facilitated charge transfer between electrode and vanadium ions.Keywords
This publication has 31 references indexed in Scilit:
- Nitrogen-doped mesoporous carbon for energy storage in vanadium redox flow batteriesJournal of Power Sources, 2010
- High Performance Oxide Functionalized Nitrogen‐Doped Mesocellular Carbon Foam for Biosensor ConstructionElectroanalysis, 2009
- Nitrogen-Doped Carbon Nanotube Arrays with High Electrocatalytic Activity for Oxygen ReductionScience, 2009
- Well-Dispersed High-Loading Pt Nanoparticles Supported by Shell−Core Nanostructured Carbon for Methanol ElectrooxidationLangmuir, 2008
- Nitrogen-doped carbon nanostructures and their composites as catalytic materials for proton exchange membrane fuel cellApplied Catalysis B: Environment and Energy, 2008
- The electrochemical reduction of VO2+ in acidic solution at high overpotentialsElectrochimica Acta, 2005
- Chemical modification of graphite electrode materials for vanadium redox flow battery application—part II. Acid treatmentsElectrochimica Acta, 1992
- Chemical modification and electrochemical behaviour of graphite fibre in acidic vanadium solutionElectrochimica Acta, 1991
- Evaluation of electrode materials for vanadium redox cellJournal of Power Sources, 1987
- New All‐Vanadium Redox Flow CellJournal of the Electrochemical Society, 1986