Technical Paper
On the charge-discharge behaviors of magnesium electrode
2011-05-17
2011-39-7237
Recently, high energy density battery attracts public attention with the application to power source of electric vehicle and electric energy storage system in solar and wind generation. Magnesium electrode has large theoretical capacity as much as 3839 mAh cm-1. Besides, magnesium compounds are abundant in the earth's crust and most of them are nontoxic. Therefore, rechargeable magnesium battery, whose negative electrode reaction is magnesium deposition / dissolution, is one of the most expected candidates. However, rechargeable magnesium deposition and dissolution is not achieved in most electrolytes. Magnesium has extensively high reactivity, leading the formation of surface films in the electrolytes. These films cannot conduct magnesium ion and inhibit magnesium deposition and dissolution reactions. So far, reversible magnesium deposition and dissolution can be achieved only in RMgX (R = alkyl or aryl, X = halogen), Mg(BR4)2 or Mg(AlCl2RR')2 / ether solutions [1,2,3].
