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Composite solid electrolyte film and preparation and application thereof

A technology of solid electrolyte and thin film, which is applied in the direction of electrolyte, non-aqueous electrolyte battery, electrolyte immobilization/gelation, etc. It can solve the problems of low conductivity of polymer solid electrolyte, unstable electrochemical properties, poor battery safety, etc. Achieve the effects of rapid continuous transmission suppression, low cost, and suppression of concentration polarization

Active Publication Date: 2020-08-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a composite solid electrolyte film and its preparation and application. In the prior art, the polymer solid electrolyte has low conductivity, unstable electrochemical properties, interface contact problems and poor battery safety.

Method used

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  • Composite solid electrolyte film and preparation and application thereof
  • Composite solid electrolyte film and preparation and application thereof
  • Composite solid electrolyte film and preparation and application thereof

Examples

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Embodiment 1

[0053] (1) According to a certain molar ratio, take respectively 2.56g vacuum-dried lithium nitrate (Alfa Aisha, >99.9%), 6.50g vacuum-dried lanthanum nitrate hexahydrate (Chinese medicine, >99.9%), 3.36g Zirconium n-butoxide (TCI, >99.0%) and) 0.338g niobium pentachloride (Sigma-Aldrich, >99.99%), placed in a 250mL volumetric flask. Weigh 200mL N,N-dimethylamide (Chinese medicine, >99.0%) and 50mL acetic acid (Chinese medicine, >98.0%) respectively in a beaker, add the mixed solution of the two into the volumetric flask, constant volume, magnetic stirring until the solute is completely dissolved. Weigh 20 g of the above dissolved solution and 3 g of PVP (Sigma-Aldrich, molecular weight 1300000) into a 100 mL beaker, and magnetically stir until the PVP is completely dissolved. During the electrospinning process, the voltage was 20kV, the distance from the needle to the receiving plate was 10cm, the advancing speed was 1mL / h, and the spinning time was 20h to obtain the LLZN na...

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Abstract

The invention relates to a composite solid electrolyte film and preparation and an application thereof. The film comprises a composite solid electrolyte matrix and MOF composite gel, wherein the composite solid electrolyte matrix is prepared from polyvinylidene fluoride-hexafluoropropylene PVDF-HFP / Li6.75La3Zr1.75Nb0.25O12LLZN nanofibers, and the composite gel is prepared from modified HKUST-1 / polyoxyethylene (PEO) / PVDF-HFP. The film has good mechanical strength, excellent ionic conductivity at room temperature and excellent safety performance, the preparation method is simple and easy to industrialize, and the solid soft package battery assembled by using the electrolyte has excellent electrochemical performance and reliable safety performance.

Description

technical field [0001] The invention belongs to the field of solid electrolyte film and its preparation and application, in particular to a composite solid electrolyte film and its preparation and application. Background technique [0002] As an energy storage device with high energy density, high operating voltage and excellent cycle stability, lithium batteries have been successfully used in electric vehicles, 3C products and some other portable mobile devices. Lithium metal, due to its standard hydrogen electrode potential of -3.045V, 0.54g / cm 3 The density and the theoretical specific capacity of 3860mAh / g are known as the "holy grail" negative electrode of the next generation lithium battery system. Although lithium metal has great application potential, most current lithium battery systems use a combination of liquid electrolyte and separator to separate the positive and negative electrodes and conduct lithium ions. Inhomogeneous deposition occurs on the surface of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/052H01M10/42
CPCH01M10/0565H01M10/052H01M10/4235H01M2300/0085H01M2300/0094H01M2300/0091Y02E60/10
Inventor 王宏志孙健其李耀刚张青红侯成义
Owner DONGHUA UNIV
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