US 12,293,852 B2
Mixed ionic-electronic conductive materials for alkali metal transport during battery cycling, and batteries incorporating same
Ju Li, Weston, MA (US); Andrea Maurano, Somerville, MA (US); Yuming Chen, Cambridge, MA (US); Ziqiang Wang, Cambridge, MA (US); and So Yeon Kim, Cambridge, MA (US)
Assigned to Massachusetts Institute of Technology, Cambridge, MA (US)
Filed by Massachusetts Institute of Technology, Cambridge, MA (US)
Filed on Mar. 14, 2022, as Appl. No. 17/694,174.
Application 17/694,174 is a continuation in part of application No. 16/499,656, granted, now 11,482,708, previously published as PCT/US2019/052422, filed on Sep. 23, 2019.
Claims priority of provisional application 62/734,564, filed on Sep. 21, 2018.
Prior Publication US 2022/0208410 A1, Jun. 30, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/00 (2006.01); H01B 1/02 (2006.01); H01B 1/06 (2006.01); H01M 4/485 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 10/0565 (2010.01); H01M 50/00 (2021.01)
CPC H01B 1/02 (2013.01) [H01B 1/06 (2013.01); H01M 4/485 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 10/0565 (2013.01); H01M 2300/0082 (2013.01); H01M 2300/0085 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A mixed ionic-electronic conductor (MIEC) in contact with a solid electrolyte comprising:
a material having a bandgap less than 3 eV, the material comprising an end-member phase directly connected to an alkali metal by a tie-line in an equilibrium phase diagram, and the material being thermodynamically stable with the solid electrolyte; and
a plurality of open pores, formed within the MIEC, to facilitate motion of the alkali metal to at least one of store the alkali metal in the plurality of open pores or release the alkali metal from the plurality of open pores,
wherein the solid electrolyte has an ionic conductivity to ions of the alkali metal greater than 1 mS cm−1, a thickness less than 100 μm, and comprises at least one of a ceramic or a polymer.