A three-dimensional nanoskeleton composite gel electrolyte material, preparation method and application thereof

A technology of electrolyte material and composite gel, which is applied in the field of three-dimensional nano-skeleton composite gel electrolyte material and its preparation, can solve problems such as uneven distribution and agglomeration, achieve good repeatability, low cost, and improve Coulombic efficiency

Inactive Publication Date: 2019-01-04
ZOTYE INT AUTOMOBILE TRADING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nanoparticles not only block the lithium ion channel due to the long distance in the polymer, but also tend to agglomerate, resulting in uneven distribution in the polymer.

Method used

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  • A three-dimensional nanoskeleton composite gel electrolyte material, preparation method and application thereof
  • A three-dimensional nanoskeleton composite gel electrolyte material, preparation method and application thereof
  • A three-dimensional nanoskeleton composite gel electrolyte material, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A preparation method of a three-dimensional nano-skeleton composite gel electrolyte material, comprising the following steps:

[0035] (1) Refer to "A Novel Sol–Gel Method for Large-Scale Production of Nanopowders: Preparation of Li 1.5 Al 0.5 Ti 1.5 (PO 4 ) 3 as an Example, J.Am.Ceram.Soc., 2016, 99, 410-414." The method in the literature utilizes the sol-gel method to prepare Li 1.5 Al 0.5 Ti 1.5 (PO 4 ) 3 (LATP) hydrogel precursor, the hydrogel is scraped onto a ceramic plate with a thickness of no more than 100 μm, dried at 80°C for 24 hours to obtain a xerogel, and then calcined at 600°C for 3 hours to obtain a nano-LATP thin layer, Its thickness is 50 μm;

[0036] (2) PVDF-HFP, EC, DMC, DEC and LiPF 6Dissolved in N,N-dimethylformamide (DMF), under magnetic stirring to obtain a homogeneous viscous mixed solution, wherein the mass ratio of EC, DMC, and DEC is 1:1:1; PVDF-HFP, The mass ratio of EC+DMC+DEC and DMF is 2:1:5; the concentration of lithium salt...

Embodiment 2

[0042] A preparation method of a three-dimensional nano-skeleton composite gel electrolyte material, comprising the following steps:

[0043] (1) Preparation of Li by sol-gel method 1.5 Al 0.5 Ti 1.5 (PO 4 ) 3 (LATP) hydrogel precursor, the hydrogel is scraped on a ceramic plate with a thickness of no more than 100 μm, dried at 80°C for 24 hours to obtain a xerogel, and then calcined at 600°C for 3 hours to obtain a 50 μm nano-LATP thin layer ;

[0044] (2) PVDF-HFP, EC, DMC, DEC and LiPF 6 Dissolved in N,N-dimethylformamide (DMF), under magnetic stirring to obtain a homogeneous viscous mixed solution, wherein the mass ratio of EC, DMC, and DEC is 1:1:1; PVDF-HFP, The mass ratio of EC+DMC+DEC and DMF is 1:2:5; the concentration of lithium salt relative to EC+DMC+DEC is 1mol / L;

[0045] (3) Drop the mixed solution into the nano-LATP thin layer, and scrape it into a wet film with uniform thickness with a scraper;

[0046] (4) The obtained wet film was vacuum-dried at roo...

Embodiment 3

[0050] A preparation method of a three-dimensional nano-skeleton composite gel electrolyte material, comprising the following steps:

[0051] (1) Preparation of Li by sol-gel method 1.5 Al 0.5 Ti 1.5 (PO 4 ) 3 (LATP) hydrogel precursor, the hydrogel is scraped on a ceramic plate with a thickness of no more than 100 μm, dried at 80°C for 24 hours to obtain a xerogel, and then calcined at 600°C for 3 hours to obtain a 50 μm nano-LATP thin layer ;

[0052] (2) PVDF-HFP, EC, DMC, DEC and LiPF 6 Dissolved in N,N-dimethylformamide (DMF), under magnetic stirring to obtain a homogeneous viscous mixed solution, wherein the mass ratio of EC, DMC, and DEC is 1:1:1; PVDF-HFP, The mass ratio of EC+DMC+DEC and DMF is 1:1:5; the concentration of lithium salt relative to EC+DMC+DEC is 1mol / L;

[0053] (3) Drop the mixed solution into the nano-LATP thin layer, and scrape it into a wet film with uniform thickness with a scraper;

[0054] (4) The obtained wet film was vacuum-dried at roo...

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Abstract

The invention discloses a three-dimensional nano-skeleton composite gel electrolyte material, a preparation method and an application thereof, which are prepared by pouring a polymer electrolyte solution added with lithium salt and plasticizer into a nano Li1. 5Al0. 5Ti1. 5 (PO4) 3 (LATP) skeleton. Which can be directly sliced into 19 mm diameter wafers and used as electrolytes for lithium ion batteries, LiFePO4 was used as cathode material and LiFePO4 was used as cathode material to assemble solid-state lithium ion semi-batteries. After 200 cycles at a rate of 0.2 C, the capacity of lithium ion batteries remained above 82%, and its coulombic efficiency was close to 100%. The method has the advantages of simple preparation process, large output, low cost, large area production, easy industrialization, inhibition of lithium dendrite growth in lithium ion batteries, and improvement of battery capacity.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery electrolyte preparation, and in particular relates to a three-dimensional nano-skeleton composite gel electrolyte material and a preparation method and application thereof. Background technique [0002] Lithium-ion batteries have been used in electric vehicles and other fields due to their advantages such as high energy density, high discharge voltage, and low self-discharge rate. However, the electrolyte of lithium-ion batteries is easy to leak, burn, and explode, which brings great potential safety hazards. To solve this problem, solid-state electrolytes and solid-state batteries have emerged. At the same time, the solid electrolyte has good mechanical properties, which can inhibit the growth of lithium dendrites and further improve battery safety. [0003] In recent years, research on polymer electrolytes and glass-ceramic electrolytes and bulk ionic conductors for lithium-ion bat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056H01M10/0525
CPCH01M10/0525H01M10/056H01M2300/0085Y02E60/10
Inventor 牛丽媛夏妍金源王康彦郭永斌
Owner ZOTYE INT AUTOMOBILE TRADING CO LTD
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