Semi-solid electrodes having high rate capability

Patent · Tue May 25 04:00:00 EDT 2021

OSTI ID:1824001

Chiang, Yet-Ming; Duduta, Mihai; Holman, Richard K.; Limthongkul, Pimpa; Tan, Taison

Embodiments described herein relate generally to electrochemical cells having high rate capability, and more particularly to devices, systems and methods of producing high capacity and high rate capability batteries having relatively thick semi-solid electrodes. In some embodiments, an electrochemical cell includes an anode and a semi-solid cathode. The semi-solid cathode includes a suspension of an active material of about 35% to about 75% by volume of an active material and about 0.5% to about 8% by volume of a conductive material in a non-aqueous liquid electrolyte. An ion-permeable membrane is disposed between the anode and the semi-solid cathode. The semi-solid cathode has a thickness of about 250 μm to about 2,000 μm, and the electrochemical cell has an area specific capacity of at least about 7 mAh/cm2 at a C-rate of C/4. In some embodiments, the semi-solid cathode slurry has a mixing index of at least about 0.9.

• Research Organization: 24M Technologies, Inc., Cambridge, MA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AR0000102
• Assignee: 24M Technologies, Inc. (Cambridge, MA)
• Patent Number(s): 11,018,365
• Application Number: 16/596,450
• OSTI ID: 1824001
• Country of Publication: United States
• Language: English