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Layered materials with improved magnesium intercalation for rechargeable magnesium ion cells

United States Patent

January 19, 2016
View the Complete Patent at the US Patent & Trademark Office
Electrochemical devices which incorporate cathode materials that include layered crystalline compounds for which a structural modification has been achieved which increases the diffusion rate of multi-valent ions into and out of the cathode materials. Examples in which the layer spacing of the layered electrode materials is modified to have a specific spacing range such that the spacing is optimal for diffusion of magnesium ions are presented. An electrochemical cell comprised of a positive intercalation electrode, a negative metal electrode, and a separator impregnated with a nonaqueous electrolyte solution containing multi-valent ions and arranged between the positive electrode and the negative electrode active material is described.
Doe; Robert Ellis (Norwood, MA), Downie; Craig Michael (Waltham, MA), Fischer; Christopher (Somerville, MA), Lane; George Hamilton (St. Helens, AU), Morgan; Dane (Middleton, WI), Nevin; Josh (Belmont, MA), Ceder; Gerbrand (Wellesley, MA), Persson; Kristin Aslaug (Orinda, CA), Eaglesham; David (Lexington, MA)
13/ 794,440
March 11, 2013
STATEMENT REGARDING FEDERALLY FUNDED RESEARCH OR DEVELOPMENT This invention was made with government support under award number DE-AR0000062, awarded by Advanced Research Projects Agency-Energy (ARPA-E), U.S. Department of Energy. The government has certain rights in the invention.