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A kind of porous plastic crystal electrolyte for all-solid metal-air battery and its preparation method, all-solid metal-air battery

An air battery and electrolyte technology, which is applied to the porous plastic crystal electrolyte for all-solid-state metal-air batteries and its preparation, in the field of all-solid-state metal-air batteries, can solve problems such as high hardness and poor electrode contact, and achieve soft-stick deformation, The effect of improving anti-oxidation performance and reducing interface resistance

Active Publication Date: 2021-09-21
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the dense ceramic electrolyte can currently achieve the ionic conductivity comparable to that of liquid electrolyte, its hardness is relatively high, and the interface with the electrode is poor, resulting in a large interface impedance.

Method used

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  • A kind of porous plastic crystal electrolyte for all-solid metal-air battery and its preparation method, all-solid metal-air battery
  • A kind of porous plastic crystal electrolyte for all-solid metal-air battery and its preparation method, all-solid metal-air battery
  • A kind of porous plastic crystal electrolyte for all-solid metal-air battery and its preparation method, all-solid metal-air battery

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preparation example Construction

[0086] The present invention also provides a method for preparing a porous plastic crystal composite, comprising the following steps:

[0087] 1) Under the condition of protective gas, heat and mix the plastic crystal, lithium salt, polymer, additive and solvent to obtain a homogeneous mixed solution;

[0088] 2) Composite the homogeneous mixed solution obtained in the above steps on the substrate, and remove the solvent at a certain temperature to obtain a porous plastic crystal composite.

[0089] In the present invention, the morphology, selection and composition of the porous plastic crystal composites in the above preparation process, as well as the corresponding optimization principles, can be compared with the corresponding morphology, selection and composition of the aforementioned porous plastic crystal composites, and the corresponding optimization principles. Correspondingly, details are not repeated here.

[0090] In the invention, firstly, under the condition of ...

Embodiment 1

[0122] Preparation of porous plastic crystal electrolyte: In an argon glove box, mix 0.5 g of succinonitrile, 0.5 g of polyvinylidene fluoride-hexafluoropropylene, 0.13 g of lithium bistrifluoromethanesulfonimide, and 0.2 g of dibutylhydroxytoluene Dissolve in 2 ml of ultra-dry DMSO at 60°C with stirring. The homogeneous mixed solution was poured on a clean glass plate to volatilize the ultra-dry dimethyl sulfoxide at 40° C. to obtain a porous plastic-crystal composite, that is, a porous plastic-crystal solid electrolyte.

[0123] The porous plastic crystal composite prepared in Example 1 of the present invention was characterized.

[0124] see figure 1 , figure 1 Scanning electron microscope picture of the porous plastic crystal composite prepared in Example 1.

[0125] Depend on figure 1 It can be seen that the porous plastic crystal composite prepared by the present invention has a porous microscopic morphology formed by stacking spherical particles and ellipsoids, wher...

Embodiment 2

[0134] Preparation of porous plastic crystal electrolyte: In an argon glove box, mix 0.5 g of succinonitrile, 0.5 g of polyvinylidene fluoride-hexafluoropropylene, 0.13 g of lithium bistrifluoromethanesulfonimide, and 0.2 g of dibutylhydroxytoluene Dissolve in 3 ml of ultra-dry dimethyl sulfoxide with stirring at 60°C. The homogeneous mixed solution was poured onto a clean glass plate at 40° C. to evaporate the ultra-dry dimethyl sulfoxide to obtain a porous plastic crystal composite.

[0135] The porous plastic crystal composite prepared in Example 2 of the present invention was characterized.

[0136] see image 3 , image 3 Scanning electron microscope picture of the porous plastic crystal composite prepared in Example 2.

[0137] Depend on image 3 It can be seen that the porous plastic crystal composite prepared by the present invention has a porous microscopic morphology formed by stacking spherical particles and ellipsoids, wherein these spherical particles are stac...

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Abstract

The invention provides a porous plastic crystal composite, which has a porous morphology formed by stacking spherical particles; the plastic crystal includes succinonitrile. The porous plastic crystal composite provided by the present invention, as a porous plastic crystal electrolyte, has the characteristics of good stability, high ionic conductivity and adjustable porosity, and is applied to all-solid metal-air batteries as an electrolyte separator and a solid positive electrode Among them, it can effectively reduce the interface impedance between the electrolyte separator and the electrode, and because of its adjustable porosity, it can also be introduced into the solid positive electrode to achieve close contact with the active material without hindering gas diffusion, effectively increasing the three The phase interface increases the reaction sites, solves the problems of the existing metal-air batteries with large interface impedance and less positive three-phase interface, and improves the electrochemical performance of the all-solid-state lithium-oxygen battery such as the discharge capacity.

Description

technical field [0001] The invention relates to the technical field of metal-air batteries, and relates to a porous plastic crystal composite and a preparation method thereof, a metal-air battery, and in particular to a porous plastic crystal electrolyte for an all-solid metal-air battery and a preparation method thereof, an all-solid state Metal-air batteries. Background technique [0002] With the continuous improvement of electric vehicles' requirements for cruising range, the current mainstream lithium-ion batteries on the market can no longer meet their needs. Metal-air batteries have attracted extensive attention due to their ultrahigh energy density ten times that of lithium-ion batteries. Air battery is a kind of chemical battery. Its construction principle is similar to that of dry battery. The difference is that its positive electrode active material is taken from oxygen or pure oxygen in the air. Such as lithium-air batteries, potassium-air batteries, sodium-air...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/16C08K5/435C08K5/13C08K5/315C08J9/28H01M10/0565H01M10/058H01M12/08
CPCC08J9/0023C08J9/0028C08J9/0033C08J9/28C08J2201/0502C08J2327/16H01M10/0565H01M10/058H01M12/08Y02E60/10Y02P70/50
Inventor 张新波王金鲍迪
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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