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Manufacturing method of all-solid-state sodium ion battery and all-solid-state sodium ion battery

A sodium-ion battery, all-solid-state technology, applied in the manufacture of electrolyte batteries, secondary batteries, non-aqueous electrolyte batteries, etc., can solve the problems of poor ion transmission channels, poor ion conductivity of solid electrolytes, etc., to avoid serious gas production , Improve the rate performance, improve the effect of ion conductivity

Inactive Publication Date: 2019-11-08
SO-FUN TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for sodium-ion batteries using solid-state electrolytes, since there is no wetting effect of liquid electrolyte, the gaps between the positive pole pieces, negative pole pieces, and solid particles of the solid-state electrolyte layer of solid-state batteries are likely to cause poor ion transport channels in the battery system. The ionic conductivity of the solid electrolyte is very poor

Method used

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  • Manufacturing method of all-solid-state sodium ion battery and all-solid-state sodium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Preparation of liquid mixture:

[0029] In a nitrogen-filled glove box (O 2 2(0<3ppm), ethylene carbonate, propylene carbonate, ethyl methyl carbonate and diethyl carbonate are mixed uniformly according to the mass ratio 2:1:4:3 to obtain an organic solvent; then take the total mass of the liquid mixed solution 85% organic solvent, to which 1% polyethylene glycol diacrylamide, 1.5% polyethylene glycol diacrylate, 0.5% methyl methacrylate and 0.3% ethylene are added based on the total mass of the liquid mixture base vinyl sulfite additive, and azobisisobutyronitrile initiator with a total mass of 0.2% of the liquid mixture; then slowly add a mixture of sodium hexafluorophosphate and sodium bisfluorosulfonimide to prepare a 1mol / L sodium salt The solution, wherein sodium hexafluorophosphate accounts for 11.0% of the total mass of the liquid mixture, is mixed uniformly to make the liquid mixture.

[0030] 2. Preparation of positive pole piece:

[0031] The positive e...

Embodiment 2

[0037] 1. Preparation of liquid mixture:

[0038] In a nitrogen-filled glove box (O 2 2 (0<3ppm), mix ethylene carbonate, propylene carbonate, methyl trifluoroethyl carbonate, propyl propionate and diethylene glycol dimethyl ether in a mass ratio of 2:1:2:3:2 Uniformly, make organic solvent; Then get the organic solvent that accounts for 87% of liquid mixed liquid gross mass, add wherein based on liquid mixed liquid gross mass 1% polyethylene glycol diacrylamide, 1% pentaerythritol triacrylate, 0.4 % vinyl acetate and 0.3% vinyl sulfite additives, and 0.3% azobisisoheptanonitrile initiator of the total mass of the liquid mixture; then slowly add sodium hexafluorophosphate, sodium perchlorate and tetrafluoro The mixture of sodium borate is prepared into a 1mol / L sodium salt solution, in which sodium hexafluorophosphate accounts for 9.0% of the total mass of the liquid mixture, and the liquid mixture is made after uniform mixing.

[0039] 2. Preparation of positive pole piece:...

Embodiment 3

[0046] 1. Preparation of liquid mixture:

[0047] In a nitrogen-filled glove box (O 2 2 (0<3ppm), ethylene carbonate, propylene carbonate, fluoroethylene carbonate, tetraethylene glycol dimethyl ether and triethylene glycol dimethyl ether according to the mass ratio of 2:1:2:2:3 Mix evenly to obtain an organic solvent; then take the organic solvent accounting for 82% of the total mass of the liquid mixed liquid, and add 1% polyethylene glycol diacrylamide, 1% polyethylene glycol diacrylamide based on the total liquid mixed liquid Acrylates, 0.5% methyl methacrylate and 0.2% ethoxylated trimethylolpropane triacrylate additives, and 0.3% dimethyl azobisisobutyrate and peroxide Dibenzoyl initiator; slowly add sodium hexafluorophosphate, sodium hexafluoroarsenate and sodium bistrifluoromethanesulfonylimide mixture to prepare a 1.2mol / L sodium salt solution, wherein sodium hexafluorophosphate accounts for 12.0% of the total mass of the liquid mixed liquid, which can be made into ...

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Abstract

The invention belongs to the sodium ion battery technology field and especially relates to a manufacturing method of an all-solid-state sodium ion battery. The method comprises the following steps ofmixing sodium salt, an organic solvent, an additives and an initiator to obtain a liquid mixture; coating on a surface of a positive pole sheet and / or a negative pole sheet to form a solid electrolytelayer; packaging to obtain a sodium ion cell; baking the sodium ion cell and injecting into the liquid mixture, and standing; heating the sodium ion cell to obtain an unactivated solid sodium ion battery; and carrying out formation, degassing and vacuum packaging on the solid-state sodium ion battery so as to obtain the all-solid-state sodium ion battery. The liquid mixture is used to fully wet asolid electrolyte layer and fill gaps in the pole sheets and the gaps in the solid electrolyte layer, and then the liquid mixture is polymerized in situ at a high temperature to form a polymer solidelectrolyte so as to form the all-solid-state sodium ion battery. Ionic conductivity of the solid electrolyte layer is improved, and rate performance of the all-solid-state sodium ion battery is improved.

Description

technical field [0001] The invention belongs to the technical field of sodium-ion batteries, and in particular relates to a preparation method of an all-solid-state sodium-ion battery and the all-solid-state sodium-ion battery. Background technique [0002] In recent years, due to environmental pollution and smog induced by the greenhouse effect have become an important hidden danger to national health, energy conservation and emission reduction and green energy have gradually become important means to solve environmental pollution problems. The use of traditional fossil energy not only pollutes the environment, but also belongs to non-renewable energy. People pay more and more attention to the development and utilization of renewable energy such as water energy, solar energy, and wind energy. However, these energy sources are random and intermittent, and cannot be directly connected to the grid for people to use. They need to be converted through energy storage systems. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/054H01M10/058H01M10/056
CPCH01M10/054H01M10/058H01M10/056Y02E60/10Y02P70/50
Inventor 徐雄文
Owner SO-FUN TECH CORP LTD
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