Nano-porous array solid electrolyte, preparation method thereof, and lithium battery

A nano-porous, nano-array technology, applied in the direction of non-aqueous electrolyte battery, electrolyte battery manufacturing, solid electrolyte, etc., can solve the problems of reducing the transmission rate of lithium ions, prolonging the transmission distance and transmission time, and reducing the electrolyte impedance and interface impedance , improve the cycle performance, and the effect of simple operation

Active Publication Date: 2018-09-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As far as the lithium-ion solid-state electrolytes currently researched are concerned, whether it is a polymer solid-state electrolyte or an inorganic solid-state electrolyte, the transmission of lithium ions inside it must jump over a high migration barrier and go through a non-linear transmission channel. , which greatly reduces the lithium ion transmission rate, prolongs the transmission distance and transmission time

Method used

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  • Nano-porous array solid electrolyte, preparation method thereof, and lithium battery
  • Nano-porous array solid electrolyte, preparation method thereof, and lithium battery
  • Nano-porous array solid electrolyte, preparation method thereof, and lithium battery

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Mix 0.62g of lithium bistrifluoromethanesulfonimide and 2.5g of N-methyl, propylpyrrole bistrifluoromethanesulfonylimide in a glove box filled with argon and with a moisture content of less than 0.1ppm. After the salt is completely dissolved to obtain a mixed solution, add 2.35g of tetrabutyl zirconate, mix well, add 2.20mL of spectral grade ultrapure water, and keep stirring until it becomes a uniform milky white solution, then pour the mixture into a mold and let it stand for 2d; After the mixture was solidified and formed, it was moved into a vacuum drying oven, and heated and dried at 80° C. for 5 days to obtain the nanoporous array-shaped solid-state electrolyte of the present invention.

[0042] The nanoporous array-like solid-state electrolyte prepared in this example was tested, and the results are as follows:

[0043] (1) Scanning electron microscope (SEM) test:

[0044]SEM test results show that the electrolyte has a uniformly distributed nanoporous array str...

Embodiment 2

[0048] Mix 0.563 g of lithium bistrifluoromethanesulfonyl imide with 2.5 g of 1-ethyl-3-methylimidazole bistrifluoromethanesulfonyl imide salt in a glove box filled with argon and with a moisture content of less than 0.1 ppm, After the lithium salt is completely dissolved to obtain a mixed solution, add 2.45g of tetrabutyl zirconate, mix well, add 2.29mL of spectral grade ultrapure water, and keep stirring until it becomes a uniform milky white solution, then pour the mixture into a mold and let it stand 2d; move the mixture into a vacuum drying oven after solidification and shaping, and heat and dry at 80° C. for 5 days to obtain the nanoporous array-shaped solid-state electrolyte of the present invention.

[0049] The nanoporous array-like solid-state electrolyte prepared in this example was tested, and the results are as follows:

[0050] (1) Scanning electron microscope (SEM) test:

[0051] SEM test results show that the electrolyte has a uniformly distributed nanoporous ...

Embodiment 3

[0055] Mix 0.469 g of lithium bistrifluoromethanesulfonimide with 2.5 g of 1-ethyl-3-methylimidazole bistrifluoromethanesulfonimide salt in a glove box filled with argon and with a moisture content of less than 0.1 ppm, After the lithium salt is completely dissolved to obtain a mixed solution, add 2.45g of tetrabutyl zirconate, mix well, add 2.29mL of spectral grade ultrapure water, and keep stirring until it becomes a uniform milky white solution, then pour the mixture into a mold and let it stand 2d; move the mixture into a vacuum drying oven after solidification and shaping, and heat and dry at 80° C. for 5 days to obtain the nanoporous array-shaped solid-state electrolyte of the present invention.

[0056] The nanoporous array-like solid-state electrolyte prepared in this example was tested, and the results are as follows:

[0057] (1) Scanning electron microscope (SEM) test:

[0058] SEM test results show that the electrolyte has a uniformly distributed nanoporous array ...

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Abstract

The invention relates to a nano-porous array solid electrolyte, a preparation method thereof, and a lithium battery, and belongs to the technical field of lithium battery electrolyte materials. The electrolyte is formed by a porous nano-array prepared by self-assembling zirconium dioxide particles and a lithium salt and ionic liquid mixture adsorbed and solidified on the surface of the particles;and the array is prepared through hydrolyzing a zirconium-containing ester organic matter in situ under the action of ultrapure water, the surface of the array is a porous structure, and vertical andordered nano-pores are uniformly distributed in the array. The nano-pores provide an ordered linear channel for lithium ion transportation, and shorten the distance and the time of ion transportation.The electrolyte is prepared by in-situ hydrolysis and ionic liquid compounding of the zirconium-containing ester organic matter under the action of ultrapure water; the ionic liquid is compounded tomake the electrolyte have high thermal stability, reduce the lithium ion transportation barrier and improve the ionic conductivity; and the method has the advantages of simplicity in operation, easilyavailable raw materials, greenness, environmental protection, and easiness in achieving large-scale production.

Description

technical field [0001] The invention relates to a nanoporous array-shaped solid-state electrolyte, a preparation method and a lithium battery, and belongs to the technical field of lithium battery electrolyte materials. Background technique [0002] Traditional lithium secondary batteries generally use organic liquid electrolytes, which inevitably introduce volatile, flammable and explosive organic solvents into the lithium secondary battery system, which has become a serious safety hazard for the battery. Compared with liquid electrolytes, solid electrolytes are particularly outstanding in terms of thermal stability, chemical stability, safety, and electrochemical performance. Therefore, the use of solid electrolytes instead of traditional organic liquid electrolytes is expected to fundamentally solve the safety problem of batteries. [0003] As far as the lithium-ion solid-state electrolytes currently researched are concerned, whether it is a polymer solid-state electroly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056H01M10/058H01M10/0525B82Y30/00
CPCB82Y30/00H01M10/0525H01M10/056H01M10/058H01M2300/0065H01M2300/0091Y02E60/10Y02P70/50
Inventor 陈人杰屈雯洁闫明霞温子越邢易李丽吴锋
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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