IP Library › Granted Patent US 12,573,659
Granted Patent B2
US 12,573,659 · App. 16/890,326 · Granted Mar 10, 2026

Membranes for electrochemical cells

Inventors: Farshid Roumi (Pasadena, CA); Jamshid Roumi (Pasadena, CA)
Assignee: California Institute of Technology
H01M10/0565H01M10/052H01M10/0562H01M10/4235H01M10/48H01M50/454H01M50/457H01M50/46H01M2300/0071H01M2300/0082H01M2300/0085
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Quick Facts
Patent No.
US 12,573,659
App. No.
16/890,326
Granted
Mar 10, 2026
Kind
B2
Abstract

Ionically conducting composite membranes are provided which include a solid-state ionically conducting material The ionically conducting composite membranes may be used in electrochemical cells. The solid-state ionically conducting material may be an electrochemically active material. In some electrochemical cells, the solid-state ionically conducting material may be in electronic communication with an external tab.

Claims (23)

1 . An electrochemical lithium ion cell comprising:

an anode comprising a primary active anode material and a first current collector in electronic communication with the primary active anode material, wherein the anode comprises lithium and a first carbonaceous material;

a cathode comprising a primary active cathode material and a second current collector in electronic communication with the primary active cathode material;

one or more electrolytes positioned between said anode and said cathode; said one or more electrolytes capable of conducting ionic charge carriers;

at least one ionically conductive and electrochemically active solid-state layer positioned between the one or more electrolytes and the anode;

wherein the at least one ionically conductive and electrochemically active solid-state layer is electronically conductive;

wherein the at least one ionically conductive and electrochemically active solid-state layer comprises an electrochemically active material characterized by voltage ranges of reduction and oxidation suitable for reaction with Li;

wherein the at least one ionically conductive and electrochemically active solid-state layer comprises a lithium titanate and a second carbonaceous material.

2 . The electrochemical cell of claim 1 , wherein the at least one ionically conductive and electrochemically active solid-state layer is from 10 nm to 50 μm in thickness.

3 . The electrochemical cell of claim 1 , wherein said at least one ionically conductive and electrochemically active solid-state layer is nonporous.

4 . The electrochemical cell of claim 1 , wherein said at least one ionically conductive and electrochemically active solid-state layer comprises one or more of said electrolytes.

5 . The electrochemical cell of claim 1 , wherein said at least one ionically conductive and electrochemically active solid-state layer is in the form of a coating on at least one side of the one or more electrolytes.

6 . The electrochemical cell of claim 1 , wherein the one or more electrolytes is a polymer electrolyte or a ceramic electrolyte.

7 . The electrochemical cell of claim 1 , wherein the at least one ionically conductive and electrochemically active solid-state layer is porous.

8 . The electrochemical cell of claim 1 , wherein said at least one ionically conductive and electrochemically active solid-state layer is in physical contact with the anode.

9 . The electrochemical cell of claim 1 , wherein the at least one ionically conductive and electrochemically active solid-state layer comprises a composite material of metal and the second carbonaceous material.

10 . The electrochemical cell of claim 1 , wherein the at least one ionically conductive and electrochemically active solid-state layer comprises a mixture of metal and the second carbonaceous material.

11 . The electrochemical cell of claim 1 , wherein the at least one ionically conductive and electrochemically active solid-state layer comprises a coating on the one or more electrolytes.

12 . The electrochemical cell of claim 1 , wherein the at least one ionically conductive and electrochemically active solid-state layer comprises a coating on the anode.

13 . The electrochemical cell of claim 1 , wherein the at least one ionically conductive and electrochemically active solid state layer and the anode are separated by a woven, non-woven, or perforated layer.

14 . The electrochemical cell of claim 13 , wherein the woven, non-woven, or perforated layer comprises polyethylene, polypropylene, polyester, polyimide, or TiO 2 .

15 . The electrochemical cell of claim 13 , wherein the woven, non-woven, or perforated layer is chemically inert.

16 . The electrochemical cell of claim 1 , wherein the one or more electrolytes comprises a solid electrolyte.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 12, 2020
From: ROUMI, FARSHID; ROUMI, JAMSHID
To: CALIFORNIA INSTITUTE OF TECHNOLOGY
Reel/Frame 052923/0611 →
Continuity (9)
Continuation 14680997 · Apr 7, 2015
Continuation In Part 14546953 · Nov 18, 2014
Continuation In Part PCTUS2014066200 · Nov 18, 2014
Provisional Application 62024104 · Jul 14, 2014
Provisional Application 61985204 · Apr 28, 2014
Provisional Application 61976281 · Apr 7, 2014
Provisional Application 61938794 · Feb 12, 2014
Provisional Application 61905678 · Nov 18, 2013
Related Publication 20200365862A1 · Nov 19, 2020
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