I'll grant that I'm not an expert in this kind of thing, but according to the article:

> Furthermore, vanadium is a readily accessible element in many different easy-to-find minerals. The rest of the battery is made up of equally accessible materials, making it easy to assemble and recycle, in comparison to lithium-ion batteries, which need metals like cobalt and manganese to function.

This paragraph links to the following website: https://www.australianvanadium.com.au/what-is-vanadium/

Obviously this doesn't answer all questions, but at the very least it's a place to start.