Researchers at the Graz Univ. of Technology (TU Graz) in Austria have developed a technique to convert vanillin, the main compound in vanilla, into a useable redox-active material for redox flow batteries. The discovery could pave the way for more sustainable flow batteries, as vanillin can be produced from lignin, a waste product of the pulp and paper industry.
Most commercial flow batteries use vanadium, a metal, as the redox-active material. Both the negative electrolyte (negolyte) and the positive electrolyte (posolyte) contain vanadium in different oxidation states.
During operation, oxidation occurs in the negolyte and the vanadium releases electrons, while at the posolyte, vanadium takes up these electrons through reduction. The electrons travel between the electrolytes, creating a current that can be delivered to a device.
However, vanadium is a depletable resource that must be mined and transported to battery manufacturers. In addition, the electrolyte typically consists of sulfuric acid and some vanadium salts.
These compounds can be toxic to humans, and if the battery leaks, they can cause harm to the environment. Recycling...
Would you like to access the complete CEP News Update?
No problem. You just have to complete the following steps.
You have completed 0 of 2 steps.
-
Log in
You must be logged in to view this content. Log in now.
-
AIChE Membership
You must be an AIChE member to view this article. Join now.
Copyright Permissions
Would you like to reuse content from CEP Magazine? It’s easy to request permission to reuse content. Simply click here to connect instantly to licensing services, where you can choose from a list of options regarding how you would like to reuse the desired content and complete the transaction.
