Poly(ketone)-based polymer electrolytes for high voltage lithium ion batteries

Patent metadata

Field	Value
Publication number	US-10490850-B2
Application number	US-201715847621-A
Country	US
Kind code	B2
Filing date	Dec 19, 2017
Priority date	Dec 16, 2017
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

New poly(ketone)-based polymers have been synthesized. When these polymers are combined with electrolyte salts, such polymer electrolytes have shown excellent electrochemical oxidation stability in lithium battery cells. Their stability along with their excellent ionic transport properties make them especially suitable as electrolytes in high energy density lithium battery cells.

First claim

We claim:

1. A polymer, comprising:
a ketone-based polymer structure described by:

a is an integer that ranges from 1 to 10;
b is an integer that ranges from 1 to 10;
n is an integer that ranges from 1 to 1000;
each Z and Z 1 is selected independently from the group consisting of:

wherein c is an integer that ranges from 0 to 10;
each R 1 is selected independently from the group consisting of hydrogen, methyl, ethyl, propyl, and isopropyl groups; and
each R is selected independently from the group consisting of:

wherein d, e, and f are integers, and each integer ranges independently from 0 to 10; and
each X is selected independently from the group consisting of hydrogen, fluorine, methyl, ethyl, isopropyl, and trifluoromethyl groups.

2. The polymer of claim 1 further comprising an electrolyte salt, wherein the polymer is an electrolyte.

3. The polymer of claim 2 further comprising ceramic electrolyte particles.

4. The polymer of claim 1 wherein the polymer is crosslinked.

5. The polymer of claim 4 further comprising an electrolyte salt, wherein the polymer is an electrolyte.

6. A positive electrode comprising:
a positive electrode active material; and
a catholyte comprising the electrolyte according to claim 2 ;
wherein the positive electrode active material particles and the catholyte are mixed together.

7. The positive electrode of claim 6 wherein the catholyte further comprises a solid polymer electrolyte.

8. The positive electrode of claim 6 wherein the catholyte further comprises ceramic electrolyte particles.

9. The positive electrode of claim 6 wherein the catholyte is crosslinked.

10. The positive electrode of claim 6 wherein the positive electrode active material is selected from the group consisting of lithium iron phosphate, lithium metal phosphate, divanadium pentoxide, lithium nickel cobalt aluminum oxide, lithium nickel cobalt manganese oxide, magnesium-rich lithium nickel cobalt manganese oxide, lithium manganese spinel, lithium nickel manganese spinel, and combinations thereof.

11. The positive electrode of claim 6 wherein the electrolyte salt is a lithium salt.

12. An electrochemical cell, comprising:
an anode configured to absorb and release lithium ions;
a cathode comprising cathode active material particles, an electronically-conductive additive, and a first catholyte;
a current collector adjacent to an outside surface of the cathode; and
a separator region between the anode and the cathode, the separator region comprising a separator electrolyte configured to facilitate movement of lithium ions back and forth between the anode and the cathode;
wherein the first catholyte comprises the electrolyte according to claim 2 , and the electrolyte salt is a lithium salt.

13. The electrochemical cell of claim 12 wherein the first catholyte further comprises a solid polymer electrolyte.

14. The electrochemical cell of claim 12 wherein the first catholyte and the separator electrolyte are the same.

15. The electrochemical cell of claim 12 wherein the separator electrolyte comprises a solid polymer electrolyte.

16. The electrochemical cell of claim 12 further comprising an overcoat layer between the cathode and the separator region, the overcoat layer comprising a second catholyte, the second catholyte comprising the electrolyte according to claim 2 .

17. The electrochemical cell of claim 16 wherein the first catholyte and the second catholyte are the same.

18. The electrochemical cell of claim 12 wherein the first catholyte further comprises ceramic electrolyte particles.

19. The electrochemical cell of claim 12 wherein the first catholyte is crosslinked.

20. A polymer, comprising:
a ketone-based polymer structure described by:

wherein n is an integer that ranges from 1 to 1000.

Assignees

• Seeo Inc
• Bosch Gmbh Robert

Inventors

• Azagarsamy Malar
• Sivanandan Kulandaivelu
• Eitouni Hany Basam
• Mailoa Jonathan P
• Samsonidze Georgy
• Gadelrab Karim R
• Kozinsky Boris

Classifications

• C08G2261/724

  Hydrogenation · CPC title

• C08G2261/516

  ion-conductive · CPC title

• C08G2261/419

  Acyclic diene metathesis [ADMET] · CPC title

• C08G2261/344

  containing heteroatoms · CPC title

• C08G2261/3327

  alkene-based · CPC title