UK Researchers at University of St. Andrews demonstrate 100 cycle endurance Li-Air battery. They used gold for the cathode, so even more expensive than Li-Ion cathodes. Sounds promising however, and maybe other cathodes will be found that will work as well or better. The authors sum it up in their last sentence:
"the results presented here encourage further study of the rechargeable non-aqueous Li-O2 cell, although many challenges to practical devices remain."
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