“Yi Cui, a professor of materials science at Stanford and senior author on the paper, says modestly, “What we’ve done is thrown a special salt into water, dropped in an electrode, and created a reversible chemical reaction that stores electrons in the form of hydrogen gas.” The basic component of the water battery is manganese sulfate, a cheap, abundant industrial salt used to make dry cell batteries, fertilizers, paper and other products, according to Stanford.”
See Stanford Researchers Announce Inexpensive Water-Based Battery To Boost Grid StorageThis sounds like good news for EVs. Light weight batteries with high capacity and endurance built from fairly inexpensive materials are just the ticket for renewable electricity supplies and EVs. So, their prototype uses a platinum catalyst. So, the electrodes are made of carbon fibre. The active ingredients are hydrogen and manganese which are cheap and plentiful. Storing the hydrogen might waste some space but hydrides are pretty efficient. The catalyst can be replaced with something less expensive. Long life also amortizes price very well.
I look forward to gradual improvement in price/performance of EVs and solar/wind generation. My Solo EV is now certified for safety in USA. Canada will wait a few months more. I’m OK with the lithium battery in it. I’d rarely need more capacity/range but I could always enjoy a lower price.