Porous plastic crystal electrolyte for all-solid-state metal-air battery, preparation method of porous plastic crystal electrolyte and all-solid-state metal-air battery

A technology of solid electrolyte and air battery, which is applied in the manufacture of non-aqueous electrolyte batteries, electrolyte batteries, fuel cell half-cells and secondary battery-type half-cells, etc. It can solve problems such as high hardness and poor electrode contact, and achieve Soft and sticky deformation, improved anti-oxidation performance, and improved discharge capacity

Active Publication Date: 2020-06-12
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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  • Porous plastic crystal electrolyte for all-solid-state metal-air battery, preparation method of porous plastic crystal electrolyte and all-solid-state metal-air battery
  • Porous plastic crystal electrolyte for all-solid-state metal-air battery, preparation method of porous plastic crystal electrolyte and all-solid-state metal-air battery
  • Porous plastic crystal electrolyte for all-solid-state metal-air battery, preparation method of porous plastic crystal electrolyte and all-solid-state 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 composite in the above-mentioned 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 composite, and the corresponding optimization principles. Correspondingly, details are not repeated here.

[0090] In the invention, firstly, under the condi...

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 compound. The porous plastic crystal compound has a porous morphology formed by stacking sphere-like particles; wherein the plastic crystal comprises succinonitrile. The invention provides a porous plastic crystal compound, which has the characteristics of good stability, high ionic conductivity, adjustable porosity and the like and is applied to anall-solid-state metal-air battery. The porous plastic crystal compound serves as an electrolyte interlayer and is introduced into a solid-state positive electrode; the interface impedance between theelectrolyte interlayer and the electrode can be effectively reduced; besides, due to the adjustable porosity, gas diffusion is not hindered while tight contact with the active material is realized byintroducing into the solid-state positive electrode; according to the invention, the three-phase interface is effectively increased, reaction sites are increased, the problems of high interface impedance and few positive electrode three-phase interfaces of an existing metal-air battery are solved, and the electrochemical properties such as the discharge capacity of the all-solid-state lithium-oxygen battery are improved.

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 Applications(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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