Talk at the 72nd Annual Meeting of the International Society of Electrochemistry in September 2021

Jens will talk at the 72nd Annual Meeting of the International Society of Electrochemistry on Jeju Island in South Korea about the results of some cell tests with Iron/Iron redox flow batteries. Iron/Iron redox flow batteries are a promising battery technology were the energy is stored in the redox transitions of Fe/Fe2+//Fe2+/Fe3+. Iron is a very cheap, abundant and non-toxic active material and its usage can lead to cheap and safe stationary batteries for renewable energy. Jens will give an overview about results of cell tests of batteries with recombination cells and the recombination itself.

Presentation at the 240th meeting of The Electrochemical Society in Orlando, Florida, USA

This year, the fall meeting of the electrochemical society (ECS) will be held in Orlando, Florida, USA, from September 10 to 14. Jens Noack will give a presentation on the results of techno-economic modeling and simulations of vanadium redox flow batteries and organic redox flow batteries.
Date/Time/Location: October 14, 2021 (8:00h-8:20h, W224B)
Symposium: A01: New Approaches and Advances in Electrochemical Energy Systems

Yifeng Li et al. published an article about “Dynamic model based membrane permeability estimation for online SOC imbalances monitoring of vanadium redox flow batteries” in Journal of Energy Storage

A model based approach is developed to determine the membrane permeability properties including vanadium ion crossover and water transfer behaviour for the vanadium redox flow battery (VRB) system. The permeability of vanadium ions and water transfer coefficients are estimated through nonlinear optimisation with measured negative and positive half-cell potentials. Experimental studies were conducted to test two different membranes as examples to illustrate the effectiveness of the proposed approach. This method can significantly simplify the conventional approach to characterising the membrane permeability property. The results are useful for online prediction of the battery system capacity decay and for scheduling regular maintenance such as electrolyte rebalancing to restore capacity.

You can access the article here:

Maria Skyllas-Kazacos and Chris Menictas have published an article about vanadium redox flow batteries

After 35 years of research and development that began at UNSW Sydney in 1985, the All-Vanadium Redox Flow Battery is now being commercialized by a number of companies around the world in applications such as load levelling, peak shaving and renewable energy storage. It is unique amongst all flow battery chemistries in that it uses the same element in both half-cells, thereby eliminating problems of cross contamination and providing indefinite life for the electrolyte. This article presents a detailed overview of the VRFB technology, beginning with the original research and development at UNSW, through to the more recent improvements in cell materials and design that have enhanced power density and reduced costs. Early field testing and current commercialization activities are also described.

You can access the article here: