ライブラリ登録: Guest

ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

A NUMERICAL STUDY ON OPTIMIZATION OF FIBROUS CARBON ELECTRODES FOR VANADIUM REDOX FLOW BATTERIES WITH INTERDIGITATED FLOW FIELDS

Get access (open in a dialog) DOI: 10.1615/IHTC16.ecl.024274
pages 4215-4221

要約

Redox flow batteries (RFBs) have been gathering much attention as one of the efficient energy storage devices that are strongly needed for energy harvesting from solar and wind energy. In typical RFBs, metal ions in aqueous solution are supplied to each electrode. For recharge/discharge process, redox reaction can be performed in fibrous carbon electrode. One of the technical challenges in RFBs is to achieve large current density operation with high energy efficiency. In this study, numerical simulation has been performed to obtain optimum parameters for the fibrous carbon electrode in a vanadium redox flow battery with interdigitated flow fields. Cell voltage was calculated by a two-dimensional model in which effects of parameters of fibrous carbon electrodes and channel geometry, i.e. fiber diameter and porosity, the thickness of the electrode and channel width, were taken into account with the flow and electrochemical reaction implemented. Calculated cell voltage showed a convex function having an optimum that was sensitive to electrode parameters investigated. Monte-Carlo simulation reveals an optimum set of parameters, suggesting further improvements applicable to practical use in redox flow batteries.