Composite solid polymer electrolytes and organic cathode materials suitable for solid-state lithium batteries

Inventors: Vilas G. Pol (West Lafayette, IN); Zheng Li (West Lafayette, IN); Sensen Zhang (Shenzhen, CN)

Assignee: Purdue Research Foundation

H01M10/0565 H01M4/382 H01M4/602 H01M10/0525 H01M2300/0091

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Quick Facts

Patent No.: US 12676341
App. No.: 17/542,704
Granted: Jul 7, 2026
Kind: B2

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Abstract

Composite solid polymer electrolytes (SPE), organic cathode electrodes, and solid-state lithium batteries (SLBs) that incorporate the SPE and/or the organic cathode electrodes. The composite solid polymer electrolytes include a hybrid polymer matrix, an LiTFSI salt dispersed in the matrix polymer matrix, and an LLZTO ceramic filler dispersed in the matrix polymer matrix. The organic cathode electrodes contain perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA).

Claims (23)

1 . A composite solid polymer electrolyte suitable for use in a solid-state lithium battery, the composite solid polymer electrolyte comprising:

a polymer matrix consisting of poly(vinylidene fluoride) (PVDF);

a lithium bis(trifluoromethane)sulfonimide (LiTFSI) salt dispersed in the polymer matrix; and

a lithium-lanthanum-zirconium-tantalum-oxygen (LLZTO) ceramic filler dispersed in the polymer matrix, wherein the PVDF and LiTFSI are present in a molar ratio of 4:1 and the LLZTO ceramic filler is 2.5% to 5% by weight of the total amount of PVDF and LiTFSI.

2 . The composite solid polymer electrolyte of claim 1 , wherein the LLZTO ceramic filler is Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 .

3 . The composite solid polymer electrolyte of claim 1 , wherein the composite solid polymer electrolyte consists of the polymer matrix, the LiTFSI salt, and the LLZTO ceramic filler.

4 . The composite solid polymer electrolyte of claim 1 , wherein the LLZTO ceramic filler is 5% by weight of the total amount of PVDF and LiTFSI.

5 . A solid-state lithium battery comprising the composite solid polymer electrolyte of claim 1 .

6 . The solid-state lithium battery of claim 5 , wherein the solid-state lithium battery comprises an organic cathode comprising perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA).

7 . The solid-state lithium battery of claim 6 , wherein the organic cathode contains the PTCDA in an amount of about 60 weight percent.

8 . The solid-state lithium battery of claim 6 , wherein the organic cathode further contains a hybrid polymer PVDF-HFP matrix, the LiTFSI salt, and the LLZTO ceramic filler.

9 . The solid-state lithium battery of claim 8 , wherein the hybrid polymer PVDF-HFP matrix comprises poly(vinylidene fluoride-co-hexafluoropropylene) and poly(ethylene carbonate) (PEC).

10 . The solid-state lithium battery of claim 5 , wherein the solid-state lithium battery comprises a lithium metal anode.

11 . An organic cathode suitable for use in a solid-state lithium battery, the organic cathode comprising perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA), conductive carbon black, and a composite solid polymer electrolyte,

wherein the composite solid polymer electrolyte comprises a hybrid polymer matrix consisting of a 1:1 by weight mixture of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and poly(ethylene carbonate) (PEC), a lithium bis(trifluoromethane) sulfonimide (LiTFSI) salt dispersed in the hybrid polymer matrix, and a ceramic filler dispersed in the hybrid polymer matrix, wherein the ceramic filler is Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 and is 2.5% to 5% by weight of the total amount of PVDF-HFP and LiTFSI.

12 . The organic cathode of claim 11 , wherein the organic cathode contains the PTCDA in an amount of about 60 weight percent.

13 . The organic cathode of claim 11 , wherein the composite solid polymer electrolyte consists of the hybrid polymer matrix, the LiTFSI salt dispersed in the hybrid polymer matrix, and the ceramic filler dispersed in the hybrid polymer matrix.

14 . The organic cathode of claim 11 , wherein the organic cathode is composed of about 60% by weight of the PTCDA, about 20% by weight of the conductive carbon black, and about 20% by weight of the composite solid polymer electrolyte.

15 . A solid-state lithium battery comprising the organic cathode of claim 12 .

16 . The solid-state lithium battery of claim 15 , wherein the solid-state lithium battery comprises a composite solid polymer electrolyte membrane.

17 . The solid-state lithium battery of claim 16 , wherein the composite solid polymer electrolyte membrane comprises a polymer matrix consisting of poly(vinylidene fluoride) (PVDF), an LiTFSI salt dispersed in the polymer matrix, and a lithium-lanthanum-zirconium-tantalum-oxygen (LLZTO) ceramic filler dispersed in the polymer matrix.

18 . The solid-state lithium battery of claim 17 , wherein the LLZTO ceramic filler is Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 .

19 . The solid-state lithium battery of claim 15 , wherein the solid-state lithium battery comprises a lithium metal anode.