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Controlled porosity in electrodes

United States Patent

June 23, 2015
View the Complete Patent at the US Patent & Trademark Office
Lawrence Berkeley National Laboratory - Visit the Technology Transfer and Intellectual Property Management Department Website
Porous electrodes in which the porosity has a low tortuosity are generally provided. In some embodiments, the porous electrodes can be designed to be filled with electrolyte and used in batteries, and can include low tortuosity in the primary direction of ion transport during charge and discharge of the battery. In some embodiments, the electrodes can have a high volume fraction of electrode active material (i.e., low porosity). The attributes outlined above can allow the electrodes to be fabricated with a higher energy density, higher capacity per unit area of electrode (mAh/cm.sup.2), and greater thickness than comparable electrodes while still providing high utilization of the active material in the battery during use. Accordingly, the electrodes can be used to produce batteries with high energy densities, high power, or both compared to batteries using electrodes of conventional design with relatively highly tortuous pores.
Chiang; Yet-Ming (Weston, MA), Bae; Chang-Jun (Palo Alto, CA), Halloran; John William (Ann Arbor, MI), Fu; Qiang (Albany, NY), Tomsia; Antoni P. (Pinole, CA), Erdonmez; Can K. (Miller Place, NY)
Massachusetts Institute of Technology (Cambridge, MA), The Regents of the University of California (Oakland, CA), The Regents of the University of Michigan (Ann Arbor, MI)
13/ 442,589
April 9, 2012
GOVERNMENT SPONSORSHIP This invention was made with government support under Grant No. FA8650-09-D-5037 awarded by the Air Force Research Laboratory and under Grant No. DE-AC02-05CH11231 awarded by the Department of Energy. The government has certain rights in this invention.