Polymer solid electrolytes, methods of making, and electrochemical cells comprising the same
The present invention generally relates to various polymer solid electrolyte materials suitable for various electrochemical devices and methods for making or using the same. Certain embodiments of the invention are generally directed to solid electrolytes having relatively high ionic conductivity and/or other mechanical or electrical properties, e.g., tensile strength or decomposition potential. Certain aspects include a polymer, a plasticizer, and an electrolyte salt. In some cases, the polymer may exhibit certain structures such as: where R 1 can be one of the following groups: where n is an integer between 1 and 10000, m is a integer between 1 and 5000, and R 2 to R 6 can each independently be one of the following structures:
1. An article, comprising:
a polymer comprising a product of a crosslinking reaction including a polymer comprising one or more of:
wherein R 1 comprises a structure selected from the group consisting of:
wherein n is an integer between 1 and 10,000, inclusive;
wherein m is an integer between 1 and 5,000, inclusive;
wherein R 2 , R 3 , R 4 , R 5 , and R 6 are each independently selected from the group consisting of:
and
wherein * indicates a point of attachment; and
an inorganic additive.
2. The article of claim 1 , wherein the product is the product of a crosslinking reaction including the polymer and a second polymer.
3. The article of claim 2 , wherein the second polymer comprises one or more of:
wherein R 1 comprises a structure selected from the group consisting of:
wherein n is an integer between 1 and 10,000, inclusive;
wherein m is an integer between 1 and 5,000, inclusive;
wherein R 2 , R 3 , R 4 , R 5 , and R 6 are each independently selected from the group consisting of:
and
wherein * indicates a point of attachment.
4. The article of claim 1 , wherein the polymer is crosslinked via urea and/or carbamate functional groups.
5. The article of claim 1 , wherein the article further comprises a plasticizer and an electrolyte salt.
6. The article of claim 5 , wherein the article further comprises an initiator.
7. The article of claim 6 , wherein initiator has a mole fraction between 0.001 and 0.01.
8. The article of claim 5 , wherein the polymer has a mole fraction between 0.027 and 0.200, the plasticizer has a mole fraction between 0.287 and 0.916, and the electrolyte salt have a mole fraction between 0.04 and 0.617.
9. The article of claim 1 , wherein the inorganic additive comprises Al 2 O 3 , SiO 2 , SiO x , TiO 2 , Li 3 PS 4 , Li 10 GeP 2 S 12 , Li 7 La 3 Zr 2 O 12 , Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 , LiLaTiO 3 , Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 , and/or Li 1.3 Al 0.3 Ge 1.7 (PO 4 ) 3 , ZrO 2 , BaTiO 3 , Li 2 TiO 3 .
10. The article of claim 1 , wherein the polymer has a tensile strength of between 5 and 500 MPa.
11. The article of claim 1 , wherein the polymer has an ionic conductivity between 1×10 −8 and 10 −2 S/cm.
12. The article of claim 1 , wherein the polymer has a decomposition voltage of at least 3.8 V.
13. An electrochemical cell, comprising the article of claim 1 .
14. The electrochemical cell of claim 13 , wherein the electrochemical cell is a battery.
15. The electrochemical cell of claim 13 , wherein the electrochemical cell a lithium-ion battery.
16. The electrochemical cell of claim 13 , wherein the electrochemical cell a lithium-ion solid-state battery.
17. A method of making the article of claim 1 , comprising:
mixing a composition comprising a polymer with a solvent to form a slurry;
removing the solvent; and
curing the slurry to form a solid electrolyte,
wherein the polymer comprises a structure comprising one or more of:
wherein R 1 comprises a structure selected from the group consisting of:
wherein n is an integer between 1 and 10,000, inclusive;
wherein m is an integer between 1 and 5,000, inclusive;
wherein R 2 , R 3 , R 4 , R 5 , and R 6 are each independently selected from the group consisting of:
and
wherein * indicates a point of attachment.
18. The method of claim 17 , further comprising, prior to curing the slurry, adding a second polymer to the solvent.
19. The method of claim 18 , wherein the second polymer comprises one or more of:
wherein R 1 comprises a structure selected from the group consisting of:
wherein n is an integer between 1 and 10,000, inclusive;
wherein m is an integer between 1 and 5,000, inclusive;
wherein R 2 , R 3 , R 4 , R 5 , and R 6 are each independently selected from the group consisting of:
and
wherein * indicates a point of attachment.