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Asymmetric battery having a semi-solid cathode and high energy density anode

United States Patent

9,437,864
September 6, 2016
View the Complete Patent at the US Patent & Trademark Office
Embodiments described herein relate generally to devices, systems and methods of producing high energy density batteries having a semi-solid cathode that is thicker than the anode. An electrochemical cell can include a positive electrode current collector, a negative electrode current collector and an ion-permeable membrane disposed between the positive electrode current collector and the negative electrode current collector. The ion-permeable membrane is spaced a first distance from the positive electrode current collector and at least partially defines a positive electroactive zone. The ion-permeable membrane is spaced a second distance from the negative electrode current collector and at least partially defines a negative electroactive zone. The second distance is less than the first distance. A semi-solid cathode that includes a suspension of an active material and a conductive material in a non-aqueous liquid electrolyte is disposed in the positive electroactive zone, and an anode is disposed in the negative electroactive zone.
Tan; Taison (Cambridge, MA), Chiang; Yet-Ming (Weston, MA), Ota; Naoki (Lexington, MA), Wilder; Throop (Lincoln, MA), Duduta; Mihai (Somerville, MA)
24M Technologies, Inc. (Cambridge, MA)
14/ 202,606
March 10, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with government support under Grant Number DE-AR0000102 awarded by the Department of Energy. The government has certain rights in this invention.