High energy density quasi-solid-state sodium-ion battery manufacturing method

A sodium ion battery, high energy density technology, applied in the direction of secondary battery, solid electrolyte, final product manufacturing, etc., can solve problems such as no industrialization scheme, achieve long chain segment, high molecular weight, high safety Effect

Active Publication Date: 2021-11-02
东莞奥创能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, porous aluminum requires prefabricated sodium before use, and so far no industrializable solution has been proposed.

Method used

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  • High energy density quasi-solid-state sodium-ion battery manufacturing method
  • High energy density quasi-solid-state sodium-ion battery manufacturing method
  • High energy density quasi-solid-state sodium-ion battery manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0049] (1) Preparation of isotropic sodium ion polyethylene-polyphenylene sulfide (PE-PPS) composite solid electrolyte

[0050] N-methylpyrrolidone (NMP), lithium sulfide Na 2 S. Lithium hydroxide NaOH, according to the material ratio of 4:1:0.2, put it in a high-pressure reactor with stirring function, and raise the temperature to 220 ° C for 4 hours to obtain a dehydration system; secondly, cool the dehydration system To 90°C, add 1,4-dichlorobenzene (p-DCB), p-DCB is the same as Na 2 The molar ratio of S to substance is 1:1. The reaction was carried out at 230° C. for 120 minutes to obtain a mixed slurry. Again, drop the same amount of HCl as NaOH in the mixed slurry to just neutralize NaOH, and remove NMP and H in the mixed slurry by evaporation or sublimation. 2 O, to obtain dry mixed powder A. The mixed powder A is sheared and pulverized with a frozen alloy blade at -40° C. to obtain a mixed powder B with D50=5 μm. In the pulverized mixed powder B, calixarone (the ad...

Embodiment approach 2

[0063] (1) Preparation of isotropic sodium ion polyethylene-polyphenylene sulfide (PE-PPS) composite solid electrolyte

[0064] N-methylpyrrolidone (NMP), lithium sulfide Na 2 S. Lithium hydroxide NaOH, according to the mass ratio of 5:2:0.3, put it in a high-pressure reactor with stirring function, and heat it up to 210 ° C for 5 hours to dehydrate at a high temperature to obtain a dehydration system; secondly, cool the dehydration system To 80 ℃, add p-DCB, p-DCB with Na 2 The molar ratio of S to substance is 1:1. The reaction was carried out at 230° C. for 120 minutes to obtain a mixed slurry. Again, drop the same amount of HCl as NaOH in the mixed slurry to just neutralize NaOH, and remove NMP and H in the mixed slurry by evaporation or sublimation. 2 O, to obtain dry mixed powder A. The mixed powder A is used at -40°C by using a frozen impact jet mill plus a classification system and a vibrating sieve machine to obtain a mixed powder B with D50=10 μm. In the pulverize...

Embodiment approach 3

[0075] (1) Preparation of isotropic sodium ion polyethylene-polyphenylene sulfide (PE-PPS) composite solid electrolyte

[0076] Put N-methylpyrrolidone (NMP), lithium sulfide Na2S, and lithium hydroxide NaOH in a high-pressure reactor with stirring function according to the mass ratio of 4.5:1.5:0.3, and heat up to 210°C for high-temperature dehydration After 5 hours, the dehydration system was obtained; secondly, the temperature of the dehydration system was lowered to 80°C, and 1,4-dichlorobenzene (p-DCB) was added, and p-DCB was the same as Na 2 The molar ratio of S to substance is 1:1. The reaction was carried out at 240° C. for 150 minutes to obtain a mixed slurry. Again, drop the same amount of HCl as NaOH in the mixed slurry to just neutralize NaOH, and remove NMP and H in the mixed slurry by evaporation or sublimation. 2 O, to obtain dry mixed powder A. The mixed powder A is used at -40 ° C to use a frozen impact jet mill plus a classification system and a vibrating...

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Abstract

The invention relates to the field of new energy, and discloses a high-energy-density quasi-solid-state sodium-ion battery manufacturing method, which consists of two main processes of prefabricated sodium and positive electrode secondary packaging for removing pre-sodium. The prefabricated sodium process is to form a uniform sodium plating on the surface of porous aluminum foil through the composite sodium ion polyethylene-polyphenylene sulfide-based composite solid electrolyte for single-layer coating pre-sodium under the action of an electric field, so that the nucleation of metallic sodium And grow uniformly, inhibit dendrite generation. The sodium-ion polyethylene-polyphenylene sulfide-based composite solid electrolyte will be tightly bonded to the sodium-storage aluminum-copper negative electrode after prefabrication of sodium, and it is easy to separate from the single-layer coated pre-sodium positive electrode. The sodium is taken out with the positive electrode, which will not cause damage to the inside of the cell, and it is vacuum-sealed for the second time. The battery produced by the method has good flame-retardant properties and good thermal stability, reduces the liquid injection volume of the electrolyte, also reduces combustibles inside the battery, and improves the safety performance of the battery.

Description

technical field [0001] The invention relates to the technical field of new energy materials and device manufacturing, in particular to a method for manufacturing a quasi-solid-state sodium-ion battery with high energy density. Background technique [0002] Since sodium-ion batteries use more abundant sodium to replace lithium, the expected cost will be greatly reduced, and more and more people are paying attention to them. However, up to now, there is no commercial separator suitable for sodium-ion batteries. After being developed, most researchers still use traditional glass fiber separators to assemble sodium-ion batteries to avoid short circuits caused by sodium dendrites. However, the high cost of glass fiber separators and the thickness of hundreds of microns directly limit the commercial application of sodium-ion batteries. [0003] In addition, the negative electrode materials of sodium-ion batteries generally have a high potential for sodium, which directly leads to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/054H01M10/0585H01M10/0565
CPCH01M10/054H01M10/0565H01M10/0585H01M2300/0082H01M2300/0085H01M2300/0094Y02E60/10Y02P70/50
Inventor 周海涛伍建春高宏权俞崇晨刘孟豪周海云凌峰侯栋
Owner 东莞奥创能源科技有限公司
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