26 Nov '11, 3pm

MIT team provides insight into OER reaction in Li-air batteries to help improve performance

MIT team provides insight into OER reaction in Li-air batteries to help improve performance 26 November 2011 Studying the oxygen evolution reaction (OER) in lithium-air batteries using first-principles calculations, researchers at MIT led by Dr. Gerbrand Ceder conclude in a paper published in the American Physical Society’s journal Physical Review B that the low charging rate and high overpotential of Li-air batteries is probably caused by the poor kinetics for the OER. Although lithium-air batteries—with high theoretical specific energies of up to ∼3400 Wh kg-1 of the electrode materials—are of great interest as next-generation, high specific-energy batteries for applications such as electric vehicles, the technology faces substantial challenges for commercialization. These include poor cyclability (up to only tens of cycles); reversibility; low energy efficiencies, with ...

Full article: http://www.greencarcongress.com/2011/11/mo-20111126.html

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Air Sealing an attic #green

greenbuildingadvisor.com 26 Nov '11, 12am

Getting ready to blow some insulation in my attic. the house was built in the 50's and walls/ceilings are the old 1/4" gyp...