Shear-thickening impact resistant electrolyte

Patent metadata

Field	Value
Publication number	US-11646441-B2
Application number	US-201916537724-A
Country	US
Kind code	B2
Filing date	Aug 12, 2019
Priority date	Aug 10, 2018
Publication date	May 9, 2023
Grant date	May 9, 2023

Abstract

A shear-thickening electrolyte solution includes a polar solvent; an electrolyte dissolved in said polar solvent; and ceramic filler dispersed in said polar solvent, said ceramic filler having an aspect ratio, length to width, of greater than 1:1 and being functionalized to provide terminal end groups that interact with the polar solvent to form a solvation layer around said ceramic filler and support the suspension of said ceramic filler in said polar solvent.

First claim

The invention claimed is:

1. A shear-thickening electrolyte solution comprising:
a carbonate-based polar solvent;
a lithium-based salt electrolyte dissolved in said carbonate-based polar solvent; and
a hollow ceramic filler dispersed in said carbonate-based polar solvent, said hollow ceramic filler having an aspect ratio, length to width, of greater than 5:1 and being functionalized to provide terminal end groups that interact with the carbonate-based polar solvent to form a solvation layer around said hollow ceramic filler and support the suspension of said hollow ceramic filler in said carbonate-based polar solvent; wherein hollow ceramic filler is selected from the group consisting of glass, silica, CaCO 3 , MoS 2 , graphene and its derivatives, Al 2 O 3 , BN and its derivatives, and combinations thereof; and wherein the ionic conductivity of the shear-thickening electrolyte solution is from 5 mS/cm to 20 mS/cm.

2. The shear-thickening electrolyte solution of claim 1 , wherein the hollow ceramic filler is functionalized by reaction with a functionalizer of Formula 1:
R 1 n —Si—R 2 —R 3   Formula 1

wherein R 1 is an alkoxy end group, n is a numeral from 1 to 3, R 2 is a carbon chain containing from 3 to 24 carbons, and R 3 is a polar terminal end group.

3. The shear-thickening electrolyte solution of claim 2 , wherein R 2 is a carbon chain containing from 3 to 6 carbons.

4. The shear-thickening electrolyte solution of claim 2 , wherein Formula 1 is (3-aminopropyl) triethoxysilane.

5. The shear-thickening electrolyte solution of claim 1 , wherein the aspect ratio is between 5:1 and 10:1.

6. The shear-thickening electrolyte solution of claim 1 , wherein the volume fraction of functionalized hollow ceramic filler in the shear-thickening composition is 5% or greater.

7. The shear-thickening electrolyte solution of claim 1 , wherein the volume fraction of functionalized hollow ceramic filler in the shear-thickening composition is 20% or greater.

8. The shear-thickening electrolyte solution of claim 1 ,
wherein the hollow ceramic filler is present in the shear-thickening composition at a volume fraction of from 1% or more and 50% or less.

9. The shear-thickening electrolyte solution of claim 1 , wherein the carbonate-based polar solvent is selected from the group consisting of ethylene carbonate, dimethyl carbonate, ethylmethyl carbonate, propylene carbonate and mixtures thereof.

10. The shear-thickening electrolyte solution of claim 9 , wherein the lithium-based salt electrolyte is selected from the group consisting of lithium hexafluorophosphate (LiPF 6 ), lithium bis(oxalato)borate, lithium bis(trifluoromethanesulfonyl)imide, and mixtures thereof.

Assignees

• Zhu Yu
• Liu Kewei
• Univ Akron

Inventors

• Zhu Yu
• Liu Kewei

Classifications

• H01M2300/0071

  Oxides · CPC title

• H01M2300/0091

  in the form of mixtures · CPC title

• H01M10/056 Primary

  characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes · CPC title

• H01M10/0567

  characterised by the additives · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title