In-situ polymerization electrolyte, method for preparing in-situ all-solid-state battery by adopting in-situ polymerization electrolyte and in-situ all-solid-state battery

An all-solid-state battery and in-situ polymerization technology, which is applied in the direction of non-aqueous electrolyte battery, electrolyte battery manufacturing, electrolyte immobilization/gelation, etc., can solve the problems affecting the application of solid-state batteries and low ion conductivity, and achieve the benefit of large Large-scale preparation and popularization and application, reduced manufacturing costs, and low production costs

Pending Publication Date: 2021-08-24
GUANGZHOU TINCI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the existing in situ polymerized electrolytes suffer from low ionic conductivity, which seriously affects their application in solid-state batteries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] This embodiment provides an in-situ polymerization electrolyte and a nickel-cobalt lithium manganese oxide / graphite in-situ all-solid-state battery prepared by using it.

[0063] The composition of the in-situ polymerization electrolyte is as follows: 50% 4'-cyano[1,1'-biphenyl]-4-yl-acrylate, 45% lithium bistrifluoromethanesulfonimide , 3% azobisisobutyronitrile and 2% N-methylpyrrolidone.

[0064] Preparation of nickel-cobalt lithium manganate / graphite in-situ all-solid-state battery:

[0065] (1) Preparation of positive electrode sheet

[0066] ① Dissolve polyvinylidene fluoride (PVDF) in N-methylpyrrolidone at a concentration of 0.1mol / L.

[0067] ②Mix PVDF, lithium nickel cobalt manganate, and conductive carbon black at a mass ratio of 10:80:10, then grind.

[0068] ③Apply the slurry obtained in the previous step evenly on the aluminum foil with a thickness of 1mm, first dry it at 60°C, then dry it in a vacuum oven at 120°C, roll it, punch it, weigh it and conti...

Embodiment 2

[0076] This embodiment provides an in-situ polymerization electrolyte and a nickel-cobalt lithium manganese oxide / lithium in-situ all-solid-state battery prepared by using it.

[0077] The composition of the in-situ polymerization electrolyte is by weight: 50% 4'-cyanobiphenyl-4-yl-methacrylate, 45% lithium sialon, 3% azobisisobutyronitrile and 2% N-methylpyrrolidone.

[0078] Preparation of nickel-cobalt lithium manganate / lithium in-situ all-solid-state battery:

[0079] (1) Preparation of positive electrode sheet

[0080] ① Dissolve polyvinylidene fluoride (PVDF) in N-methylpyrrolidone at a concentration of 0.1mol / L.

[0081] ②Mix PVDF, lithium nickel cobalt manganate, and conductive carbon black at a mass ratio of 10:80:10, then grind.

[0082] ③Apply the slurry obtained in the previous step evenly on the aluminum foil with a thickness of 1mm, first dry it at 60°C, then dry it in a vacuum oven at 120°C, roll it, punch it, weigh it and continue to dry it at 120°C °C in a...

Embodiment 3

[0090] This embodiment provides an in-situ polymerization electrolyte and a nickel-cobalt lithium manganese oxide / graphite in-situ all-solid-state battery prepared by using it.

[0091] The composition of the in-situ polymerization electrolyte is: 40% 4-[4-[(1-oxo-2-propen-1-yl)oxy]butoxy]-,4-cyanobenzoic acid ester, 56% lithium bistrifluoromethylsulfonimide, 2% azobisisobutyronitrile, and 2% N-methylpyrrolidone.

[0092] The preparation conditions of the nickel-cobalt lithium manganate / graphite in-situ all-solid-state battery are the same as in Example 1, and the test results of the in-situ all-solid-state battery internal resistance and discharge capacity are shown in Table 1.

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Abstract

The invention relates to the technical field of all-solid-state batteries, and particularly discloses an in-situ polymerization electrolyte, a method for preparing an in-situ all-solid-state battery by adopting the in-situ polymerization electrolyte and the in-situ all-solid-state battery. The in-situ polymerization electrolyte comprises polymerizable liquid crystal, lithium salt and a polymerization initiator, the polymerizable liquid crystal is acrylic ester containing cyano groups, and the viscosity of the in-situ polymerization electrolyte is 1-1000 cps. The method for preparing the in-situ all-solid-state battery by adopting the in-situ polymerization electrolyte comprises the following steps: injecting the in-situ polymerization electrolyte serving as a prepolymer between a positive electrode and a negative electrode of the assembled battery, and performing heating and curing to convert the in-situ polymerization electrolyte into a solid polymer electrolyte. The preparation method of the in-situ all-solid-state battery can share a lithium ion battery production line with the liquid electrolyte, the investment of newly added equipment is low, and the commercialization process of the solid-state battery can be greatly promoted.

Description

technical field [0001] The present invention relates to the technical field of all-solid batteries, and relates to an in-situ polymerized electrolyte and its application in all-solid-state batteries, in particular to an in-situ polymerized electrolyte, a method for preparing an in-situ all-solid battery using the same, and an in-situ all-solid battery solid state battery. Background technique [0002] All-solid-state batteries are an inevitable development trend of battery technology in the future, and solid-state electrolytes, as the core material of all-solid-state batteries, have become a battleground for military strategists. To put it simply, a solid-state electrolyte is a superionic conductor that replaces the role of the electrolyte and separator in a traditional lithium-ion battery in an all-solid-state battery, and is responsible for conducting ions and connecting the positive and negative electrodes. To realize the application of solid-state electrolytes in all-so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/0525H01M10/058H01M10/42
CPCH01M10/0565H01M10/0525H01M10/058H01M10/4235H01M2300/0085Y02P70/50Y02E60/10
Inventor 何天贤周萌范伟贞罗海英高远鹏赵经纬徐三善徐金富
Owner GUANGZHOU TINCI MATERIALS TECH
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