Compositions and methods for energy storage devices including salts and/or foams

Patent metadata

Field	Value
Publication number	US-12300805-B2
Application number	US-201917291491-A
Country	US
Kind code	B2
Filing date	Nov 7, 2019
Priority date	Nov 8, 2018
Publication date	May 13, 2025
Grant date	May 13, 2025

Abstract

An energy storage device can include a cathode, an anode, and a separator between the cathode and the anode. At least one of the electrodes can include an electrode film prepared by a dry process. The electrode film, the electrode and/or the separator can comprise a salt, improved porosity, increased density, be prelithiated, and/or a foam. An energy storage device can include a dry composite solid polymer electrolyte (SPE) film. Process and apparatuses used for fabricating the composite solid polymer electrolyte film, electrode and/or electrode film are also described.

First claim

What is claimed is:

1. A dry composite solid polymer electrolyte (SPE) film of an energy storage device, comprising:
a dry ion conducting polymer;
a dry lithium source;
a dry binder comprising a fibrillized binder;
an ion conducting medium; and
a dry filler material,
wherein the SPE film is free-standing and absent of solvent residue.

2. The SPE film of claim 1 , wherein the dry ion conducting polymer is selected from polyethylene oxide (PEO), polyvinylidene fluoride (PVDF), poly(methylene oxide), polyoxymethylene, poly(vinyl alcohol) (PVA), poly(vinyl pyrrolidone) (PVP), poly(methyl methacrylate), poly(vinyl acetate), poly(vinylchloride), poly(oxyethylene) 9 methacrylate, poly(ethylene oxide) methyl ether methacrylate, and poly(propylenimine), and combinations thereof.

3. The SPE film of claim 1 , wherein the dry lithium source is selected from lithium perchlorate (LiClO 4 ), lithium tetrafluoroborate (LiBF 4 ), lithium hexafluorophosphate (LiPF 6 ), lithium bis(trifluoromethane sulfonimide) (LiTFSI) (Li(C 2 F 5 SO 2 ) 2 N), lithium bis(oxalato)borate (LiB(C 2 O 4 ) 2 ), lithium trifluoromethanesulfonate (LiCF 3 SO 3 ), lithium bis(pentafluoroethanesulfonyl)imide (C 4 F 10 LiNO 4 S 2 ), lithium bis(fluorosulfonyl)imide (F 2 LiNO 4 S 2 ), lithium difluoro(oxalato) borate (LiBF 2 (C 2 O 4 ), lithium difluorophosphate (F 2 LiO 2 P), lithium trifluorochloroborate (LiBF 3 Cl), lithium hexafluoroarsenate (LiAsF 6 ), Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 , Li 7 La 3 Zr 2 O 12 , Li 10 SnP 2 S 12 , Li 3 xLa 2/3x TiO 3 (wherein 0<x<2/3), Li 0.8 La 0.6 Zr 2 (PO 4 ) 3 , Li 1+x Ti 2−x Al x (PO 4 ) 3 (wherein 0<x<2), Li 1+x+y Ti 2−x Al x Si y (PO 4 ) 3−y (wherein 0<x<2 and 0<y<3), and LiTi x Zr 2−x (PO 4 ) 3 (wherein 0<x<2), and combinations thereof.

4. The SPE film of claim 1 , wherein the dry filler material is selected from titanium oxide (TiO 2 ), silica (SiO 2 ), silicon oxide (SiO), copper oxide (CuO), montmorillonite ((Na,Ca) 0.33 (Al,Mg) 2 (Si 4 O 10 ), bentonite (Al 2 O 34 SiO 2 H 2 O), kaolinite (Al 2 Si 2 O 5 (OH) 4 ), hectorite (Na 0.3 (Mg,Li) 3 Si 4 O 10 (OH) 2 ), and halloysite (Al 2 Si 2 O 5 (OH) 4 ), 4′-Amino-2,3′-dimethylazobenzene (CH 3 C 6 H 4 N═NC 6 H 3 (CH 3 )NH 2 ), yttrium aluminum oxide (Y 3 Al 5 O 12 ), yttrium iron oxide (Y 3 Fe 5 O 12 ) and nanoclay, and combinations thereof.

5. The SPE film of claim 1 , wherein the ion conducting medium is selected from nanoclay, garnet, and combinations thereof.

6. The SPE film of claim 1 , wherein the dry binder is selected from the group consisting of polyethylene (PE), polytetrafluoroethylene (PTFE), and combinations thereof.

7. A separator for an energy storage device, the separator comprising the SPE film of claim 1 .

8. The SPE film of claim 1 , wherein the SPE film comprises a thickness of about 160 μm.

9. The SPE film of claim 1 , wherein the SPE film has a film density of at least 0.9-1.1 g/cm 3 .

10. An energy storage device comprising:
the SPE film of claim 1 ;
a cathode;
an anode; and
a housing, wherein the SPE film, the cathode and the anode are positioned within the housing.

11. The energy storage device of claim 10 , wherein the energy storage device comprises a solid-state capacitor or a solid-state battery.

Assignees

• Tesla Inc

Inventors

• Petrowsky Matt
• Shin Joon Ho
• Duong Hieu Minh
• Tapia Vicente

Classifications

• H01M10/0565

  Polymeric materials, e.g. gel-type or solid-type · CPC title

• H01M10/058

  Construction or manufacture · CPC title

• H01G11/56

  Solid electrolytes, e.g. gels; Additives therein · CPC title

• H01M2300/0068

  inorganic · CPC title

• H01M50/403

  Manufacturing processes of separators, membranes or diaphragms · CPC title