Scientists create a vanadium flow battery model

July 3, 2018, Skolkovo Institute of Science and Technology

A group of scientists from the Skolkovo Institute of Science and Technology (Skoltech), Lomonosov Moscow State University (MSU) and the Moscow Institute of Physics and Technology (MIPT), led by Skoltech Professor Aldo Bischi, has developed a mathematical model of the electrochemical cell of the vanadium flow battery. The model describes the battery's dynamic behavior, including the flow of vanadium ions through the cell membrane. The results of the study were published in the journal Applied Energy.

The flow battery is seen as one of the most advanced storage devices from the perspective of its integration with renewable energy sources. The battery's operating principle consists of converting electrical energy into the energy of chemical reactions between vanadium salts. The flow battery differs from classical batteries in that it uses both the electrochemical cell and the liquid electrolyte stored in separate tanks and flowing through the cell when the battery is in operation. Thus, the battery's capacity and power can be scaled independently, which gives the designers more flexibility in creating real power installations and enables them to design new high-power and high-capacity storage devices. Another advantage of vanadium flow batteries is that they have a much longer life compared to their conventional counterparts. Currently, vanadium flow batteries are used in combination with solar panels and wind power generators. The new model will help detect and monitor failures and expand the scope of application of the battery.

The new mathematical model effectively describes the cross-over ‒ a major problem in the vanadium flow battery's operation, leading to capacity reduction.

The approach proposed by Professor Aldo Bischi and his team helps attain high accuracy in modeling the battery's charge and discharge characteristics (voltage, capacity, and charge level) and the capacity reduction due to cross-over using reasonable computational effort.

"Our can be used to develop condition monitoring techniques for vanadium batteries as a way to prevent degradation of their performances due to long operation," explains the study's first author and Skoltech Ph.D. student Mikhail Pugach.

Explore further: Pharmaceutical material shows promise for better grid-scale batteries

More information: M. Pugach et al. Zero dimensional dynamic model of vanadium redox flow battery cell incorporating all modes of vanadium ions crossover, Applied Energy (2018). DOI: 10.1016/j.apenergy.2018.05.124

Related Stories

Recommended for you

Archaeologists discover Incan tomb in Peru

February 16, 2019

Peruvian archaeologists discovered an Incan tomb in the north of the country where an elite member of the pre-Columbian empire was buried, one of the investigators announced Friday.

What rising seas mean for local economies

February 15, 2019

Impacts from climate change are not always easy to see. But for many local businesses in coastal communities across the United States, the evidence is right outside their doors—or in their parking lots.

The friendly extortioner takes it all

February 15, 2019

Cooperating with other people makes many things easier. However, competition is also a characteristic aspect of our society. In their struggle for contracts and positions, people have to be more successful than their competitors ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.