Hi, An interesting combination that might work for a rechargeable Magnesium battery is formed by using a protected Magnesium anode according to some interesting work that has been done by KIST in Korea. (See https://www.kist.re.kr/eng/newscenter/research-interviews.do?mode=view&articleNo=9426&title=%5BGRaND-KIST%5D+From+commercialization+to+future+studies...)
For the cathode, FeCl3 could be used according to https://www.labmanager.com/new-battery-cathode-material-could-revolutionize-ev-market-and-energy-storage-32879), with a 4M MgCl2 solution as electrolyte. All three components are dirt cheap, and comprise Earth abundant chemicals, that are available almost everywhere. Regards, Robin van Spaandonk Drive your electric car every second day and recharge it from solar panels, on the roof of your home, on the alternate days. The other days, drive your spouses car, and do the same with it. "Charge when the Sun shines".
