Electrolyte and battery

Patent metadata

Field	Value
Publication number	US-10411257-B2
Application number	US-201715852236-A
Country	US
Kind code	B2
Filing date	Dec 22, 2017
Priority date	Dec 28, 2016
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

An electrolyte is provided, which includes (a) 100 parts by weight of oxide-based solid state inorganic electrolyte, (b) 20 to 70 parts by weight of [Li(—OR1)n−OR2]Y, wherein R1 is C1-4 alkylene group, R2 is C1-4 alkyl group, n is 2 to 100, and Y is PF6−, BF4−, AsF6−, SbF6−, ClO4−, AlCl4−, GaCl4−, NO3−, C(SO2CF3)3−, N(SO2CF3)2−, SCN−, CF3CF2SO3−, C6F5SO3−, CF3CO2−, SO3F−, B(C6H5)4−, CF3SO3−, or a combination thereof, (c) 1 to 10 parts by weight of nano oxide, and (d) 1 to 20 parts by weight of binder. The electrolyte can be disposed between a positive electrode and a negative electrode to form a battery.

First claim

What is claimed is:

1. An electrolyte, comprising:
(a) 100 parts by weight of oxide-based solid state inorganic electrolyte;
(b) 20 to 70 parts by weight of [Li(—OR 1 ) n − OR 2 ]Y, wherein R 1 is C 1-4 alkylene group, R 2 is C 1-4 alkyl group, n is 2 to 100, and Y is PF 6 − , BF 4 − , AsF 6 − , SbF 6 − , ClO 4 − , AlCl 4 − , GaCl 4 − , NO 3 − , C(SO 2 CF 3 ) 3 − , N(SO 2 CF 3 ) 2 − , SCN − , CF 3 CF 2 SO 3 − , C 6 F 5 SO 3 − , CF 3 CO 2 − , SO 3 F − , B(C 6 H 5 ) 4 − , CF 3 SO 3 − , or a combination thereof;
(c) 1 to 10 parts by weight of nano oxide; and
(d) 1 to 20 parts by weight of binder.

2. The electrolyte as claimed in claim 1 , wherein the oxide-based solid state inorganic electrolyte comprises lithium lanthanum zirconium oxide, lithium lanthanum titanium oxide, lithium aluminum titanium phosphate, or a combination thereof.

3. The electrolyte as claimed in claim 1 , wherein the nano oxide comprises silicon oxide, aluminum oxide, cerium oxide, titanium oxide, or a combination thereof.

4. The electrolyte as claimed in claim 1 , wherein the binder comprises polyvinylidene difluoride, polytetrafluoroethylene, polyvinyl alcohol, polyethylene glycol, carboxymethyl cellulose, styrene-butadiene rubber, polyacrylate, polyacrylonitrile, or a combination thereof.

5. The electrolyte as claimed in claim 1 , further comprising (e) 1 to 20 parts by weight of hyper-branched polymer, and the surface of the oxide-based solid state inorganic electrolyte is modified by the hyper-branched polymer.

6. The electrolyte as claimed in claim 5 , wherein the hyper-branched polymer is formed by a cross-linking reaction of a prepolymer and a basic promoter, and the group and a precursor of a Lewis base.

7. The electrolyte as claimed in claim 6 , wherein the precursor containing a maleimide functional group is:

or a combination thereof,
wherein R 3 is —CH 2 NHCH 2 —, —C 2 H 4 NHC 2 H 4 —, —C(O)CH 2 —, —CH 2 OCH 2 —, —C(O)—, —O—, —S—, —S—S—, —S(O)—, —CH 2 S(O)CH 2 —, —(O)S(O)—, —CH 2 (C 6 H 4 )CH 2 —, —CH 2 (C 6 H 4 )O—, —(CH 2 CH(CH 3 )O)—, phenylene group, biphenylene group, C 2-8 alkylene group,

wherein each R 6 is independently —(CH 2 CH 2 )O—, phenylene group, or C 2-8 alkylene group,
wherein R 4 is C 2-8 alkylene group, —C(O)—, —C(CH 3 ) 2 —, —O—, —S—, —S—S—, —S(O)—, —(O)S(O)—, or —O(C 6 H 4 )C(CF 3 ) 2 (C 6 H 4 )O—,
when m=3, R 5 is

each R 6 is independently —(CH 2 CH 2 )O—, phenylene group, or C 2-8 alkylene group, a+b+c=5 or 6, and each of a, b, and c is greater than or equal to 1;
when m=4, R 5 is

each R 6 is independently —(CH 2 CH 2 )O—, phenylene group, or C 2-8 alkylene group;
when m=8, R 5 is

wherein m′ is 2 to 5.

8. The electrolyte as claimed in claim 6 , wherein the precursor of Lewis base has
a structure of

wherein Z is —SH or —NH 2 , and R 7 is

wherein a′+b′=45, or

9. The electrolyte as claimed in claim 6 , wherein the basic promoter has a structure of:

wherein each R 8 is independently H, alkyl group, alkenyl group, phenyl group, dimethylamino group, halogen, or —NH 2 , and
wherein each R 9 is independently alkyl group, alkenyl group, phenyl group, or halogen.

10. A battery, comprising:
a positive electrode;
a negative electrode; and
the electrolyte as claimed in claim 1 disposed between the positive electrode and the negative electrode.

11. The battery as claimed in claim 10 , further comprising a gel type electrolyte covering a surface of the positive electrode, a surface of the negative electrode, or both the surface of the positive electrode and the surface of the negative electrode, wherein the gel type electrolyte comprises a hyper-branched polymer, a lithium salt, and a solvent.

12. The battery as claimed in claim 11 , wherein the hyper-branched polymer is formed by a cross-linking reaction of a prepolymer and a basic promoter, and the prepolymer is formed by a reaction of a precursor containing a maleimide functional group and a precursor of a Lewis base.

13. The battery as claimed in claim 10 , wherein the electrode is attached to the negative electrode, and an electrolyte liquid is disposed between the electrolyte and the positive electrode.

14. The battery as claimed in claim 13 , further comprising a separator film disposed between the electrolyte and the negative electrode.

Assignees

• Ind Tech Res Inst

Inventors

• Chang Chih-Ching
• Fang Jason
• Wu Wei-Hsin
• Chao Chung-Hsiang
• Liu Chia-Erh

Classifications

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/485 Primary

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• C01G23/04

  Oxides; Hydroxides · CPC title

• H01M10/0562

  Solid materials · CPC title

• C01F7/02

  Aluminium oxide; Aluminium hydroxide; Aluminates · CPC title