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HIGH ENERGY DENSITY SECONDARY LITHIUM BATTERIES

United States Patent Application

20140106215
A1
View the Complete Application at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A lithium ion battery includes a positive electrode comprising carbon fibers, a binder composition with conductive carbon, and a lithium rich composition. The lithium rich composition comprises at least one selected from the group consisting of Li.sub.1+x(My Mz.sup.II Mw.sup.III)O.sub.2 where x+y+z=1, and xLi.sub.2MnO.sub.3(1-x)LiMO.sub.2, where x=0.2-0.7, and where M, M.sup.II and M.sup.III are interchangeably manganese, nickel and cobalt, and LiM.sub.2-xM.sub.x.sup.IIO.sub.4 , where M and M.sup.II are manganese and nickel, respectively, with x=0.5. A negative electrode comprises carbon fibers having bound thereto silicon nanoparticles, and a mesophase pitch derived carbon binder between the silicon nanoparticles and the carbon fibers. An electrolyte is interposed between the positive electrode and the negative electrode. Methods of making positive and negative electrodes are also disclosed.
NANDA, Jagjit (Knoxville, TN), DUDNEY, Nancy J. (Knoxville, TN), NARULA, Chaitanya Kumar (Knoxville, TN), PANNALA, Sreekanth (Knoxville, TN), UNOCIC, Raymond Robert (Knoxville, TN), MARTHA, Surendra Kumar (Knoxville, TN)
UT-BATTELLE, LLC (Oak Ridge TN)
13/ 651,322
October 12, 2012
[0001] This invention was made with government support under contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in this invention.