This is old news; Li-air batteries have a 25+ yr history and still a lot of problems to overcome (see the USPTO site and these two papers by K. M. Abraham: “ Non-aqueous Lithium-Air Batteries with an Advanced Cathode Structure”, in Proceedings of 41th Power Sources Conference, Philadelphia, PA, 2004 “Cathode Optimization of Lithium Air Batteries”, Fall Meeting of The Electrochemical Society, Los Angeles, CA, September 2005. Abstract No. 823.) Interestingly, the original paper by P. Bruce was published 3 years ago in J. Am. Chem. Soc. 128, 1390 (2006); perhaps something 'nano' was added to spice it up? :-) --lzp