In 2015, an estimated 62% of global tantalum supply came from Africa, 45% of it from Central Africa, mainly from Rwanda and the DRC. That was not the case in the past and it may not be the case in future….
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By Tamra Alliot Vanadium may be seeking a leading position in the renewable energy revolution. The tricky issue of energy storage could be solved with vanadium redox flow batteries (RFBs).…