Superionic conductive polymer electrolyte composite for lithium battery

Patent metadata

Field	Value
Publication number	US-10840500-B2
Application number	US-201916434240-A
Country	US
Kind code	B2
Filing date	Jun 7, 2019
Priority date	Jun 7, 2018
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

A method of creating a composite cathode for use within a lithium ion battery. The method beginning with the step of preparing an electrolytic solution. The electrolytic solution includes a plasticizer, a crosslinkable polyether, a first lithium salt and a second lithium salt. The method ending with the step of impregnating a cathodic material with the electrolytic solution so as to form the composite cathode.

First claim

What is claimed is:

1. A method of creating a composite cathode for use within a lithium ion battery comprising the steps of:
a. preparing an electrolytic solution wherein the electrolytic solution includes a plasticizer, a crosslinkable polyether, a first lithium salt and a second lithium salt; and
b. impregnating a cathodic material with the electrolytic solution so as to form the composite cathode.

2. The method of claim 1 wherein the cathodic material is selected from the group Lithium Iron Phosphate (LFP), Lithium Nickel Cobalt Manganese Oxide (NMC), Lithium Nickel Manganese Spinel (LMN) Lithium Nickel Cobalt Aluminum Oxide (NCA), Lithium Cobalt Oxide (LCO), and Lithium Manganese Oxide (LMO).

3. The method of claim 1 wherein the plasticizer is selected from the group consisting of glutaronitrile (GCN), succinonitrile (SCN), adiponitrile, camphor, dialkylsebacate, alkyl sterate, and mixtures thereof.

4. The method of claim 3 wherein the crosslinkable polyether is selected from the group consisting of poly(ethylene glycol)diacrylate (PEGDA), poly(ethylene glycol)dimethacrylate (PEGDMA), poly(propylene glycol) diacrylate (PPGDA), and poly(propylene glycol) dimethacrylate (PPGDMA), fluoralkyl diacrylate, fluoroalkyl monoacrylate, fluoroalkyl dimetharylate, fluoralkyl metharylate, and mixtures thereof.

5. The method of claim 4 wherein the first lithium salt is selected from the group consisting of lithium bis-trifluoromethanesulfonylimide (LiTFSI), lithium bis-perfluoroethylsulfonylimide, lithium tetrafluoroborate, and lithium perchlorate and mixtures thereof.

6. The method of claim 5 wherein the second lithium salt is selected from the group consisting of lithium bis(oxalate)borate (LiBOB), lithium tetrafluoroborate (LiBF 4 ), lithium difluoro(oxalate)borate (LiODFB), lithium hexfluorophosphate LiPF 6 ), and mixtures thereof.

7. The method of claim 6 wherein the plasticizer is GCN, the crosslinkable polyether is PEGDA, the first lithium salt is LiTFSI, and the second lithium salt is LiBOB.

8. A method of creating a lithium ion battery comprising the steps of:
a. preparing an anode;
b. preparing a composite cathode comprising the steps of;
i. preparing an electrolytic solution wherein the electrolytic solution includes a plasticizer, a crosslinkable polyether, a first lithium salt and a second lithium salt; and
ii. impregnating a cathodic material with the electrolytic solution so as to form the composite cathode; and

c. combining the anode and composite cathode to create the lithium ion battery.

9. The method of claim 8 wherein the anode is selected from the group consisting of lithium metal, graphite, silicon, tin, germanium, and combinations thereof.

10. The method of claim 8 wherein the cathodic material is selected from the group consisting of Lithium Iron Phosphate (LFP), Lithium Nickel Cobalt Manganese Oxide (NMC), Lithium Nickel Manganese Spinel (LMN) Lithium Nickel Cobalt Aluminum Oxide (NCA), Lithium Cobalt Oxide (LCO), and Lithium Manganese Oxide (LMO).

11. The method of claim 8 wherein the plasticizer is selected from the group consisting of glutaronitrile (GCN), succinonitrile (SCN), adiponitrile, camphor, dialkylsebacate, alkyl sterate, and mixtures thereof.

12. The method of claim 11 wherein the crosslinkable polyether is selected from the group consisting of poly(ethylene glycol)diacrylate (PEGDA), poly(ethylene glycol)dimethacrylate (PEGDMA), poly(propylene glycol) diacrylate (PPGDA), and poly(propylene glycol) dimethacrylate (PPGDMA), fluoralkyl diacrylate, fluoroalkyl monoacrylate, fluoroalkyl dimetharylate, fluoralkyl metharylate, and mixtures thereof.

13. The method of claim 12 wherein the first lithium salt is selected from the group consisting of lithium bis-trifluoromethanesulfonylimide (LiTFSI), lithium bis-perfluoroethylsulfonylimide, lithium tetrafluoroborate, and lithium perchlorate and mixtures thereof.

14. The method of claim 13 wherein the second lithium salt is selected from the group consisting of lithium bis(oxalate)borate (LiBOB), lithium tetrafluoroborate (LiBF 4 ), lithium difluoro(oxalate)borate (LiODFB), lithium hexfluorophosphate LiPF 6 ), and mixtures thereof.

15. The method of claim 14 wherein the plasticizer is GCN, the crosslinkable polyether is PEGDA, the first lithium salt is LiTFSI, and the second lithium salt is LiBOB.

16. The method of claim 8 further comprising the step of preparing a solid polymer electrolytic film prior to the combining step.

17. The method of claim 16 wherein the step of preparing a solid polymer electrolytic film comprises the sub-steps of:
a. preparing an electrolytic film solution wherein the electrolytic film solution includes a plasticizer, a crosslinkable polyether, a first lithium salt, a second lithium salt, and a crosslinking agent; and
b. crosslinking the electrolytic solution to form the solid polymer electrolytic film.

18. The method of claim 17 wherein the composite cathode is laminated with the solid polymer electrolytic film to form a laminated cathode.

19. The method of claim 17 wherein the plasticizer for the electrolytic film solution is selected from the group consisting of glutaronitrile (GCN), succinonitrile (SCN), adiponitrile, camphor, dialkylsebacate, alkyl sterate, and mixtures thereof and wherein the crosslinkable polyether for the electrolytic film solution is selected from the group consisting of poly(ethylene glycol)diacrylate (PEGDA), poly(ethylene glycol)dimethacrylate (PEGDMA), poly(propylene glycol) diacrylate (PPGDA), and poly(propylene glycol) dimethacrylate (PPGDMA), fluoralkyl diacrylate, fluoroalkyl monoacrylate, fluoroalkyl dimetharylate, fluoralkyl metharylate, and mixtures thereof.

20. The method of claim 17 wherein the first lithium salt for the electrolytic film solution is selected from the group consisting of lithium bis-trifluoromethanesulfonylimide (LiTFSI), lithium bis-perfluoroethylsulfonylimide, lithium tetrafluoroborate, and lithium perchlorate and mixtures thereof; wherein the second lithium salt for the electrolytic film solution is selected from the group consisting of lithium bis(oxalate)borate (LiBOB), lithium tetrafluoroborate (LiBF 4 ), lithium difluoro(oxalate)borate (LiODFB), lithium hexfluorophosphate LiPF 6 ), and mixtures thereof; and wherein the crosslinking agent for the electrolytic film solution is selected from the group consisting of trimethylolpropane triacrylate (TMPTA), pentaerythritol triacrylate, trimethylolpropane ethoxylate triacrylate, trimethylolpropane propoxylate triacrylate, glycidyl methacrylate (GMA) and mixtures thereof.

Assignees

• Zhu Yu
• Univ Akron

Inventors

• Zhu Yu

Classifications

• H01M10/0565

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

• H01M4/1391

  of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M4/136

  Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title

• H01M2004/028

  Positive electrodes · CPC title