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Preparation method of nano-doped grid patterning gel polymer electrolyte

A grid pattern and electrolyte technology, which is applied in the field of polymer electrolytes and porous polymer electrolyte framework materials, can solve problems such as difficulty in maintaining a stable shape, low gel electrolyte strength, and reduced electrochemical performance, and achieve stable capacity and improved Interface stability, the effect of improving mechanical properties

Active Publication Date: 2015-05-20
BEIJING UNIV OF CHEM TECH
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  • Abstract
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Problems solved by technology

The nanofiber membrane used as the framework material of the gel-type polymer electrolyte needs to be isotropic, so the non-woven nanofiber membrane prepared by the flat plate collection device is mostly used, but its mechanical properties are poor, and the strength of the formed gel electrolyte is low, which is difficult to obtain. maintain a stable shape
Although the mechanical properties of the oriented nanofibrous membrane are improved, the highly oriented fiber structure is not conducive to the transmission of lithium ions, which will reduce its electrochemical performance.

Method used

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  • Preparation method of nano-doped grid patterning gel polymer electrolyte
  • Preparation method of nano-doped grid patterning gel polymer electrolyte

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Embodiment 1

[0028] Component 1: Polyacrylonitrile, molecular weight 10 5 g / mol (Mw), produced by PetroChina Jilin Petrochemical Company. Component 2: self-made carbon nanofiber coated with methyl methacrylate, using VGCF produced by Japan Showa Denko Co., Ltd. TM -S Carbon nanofibers are prepared by in-situ polymerization process. The outer diameter of carbon nanofibers is 50-150nm, the average length is 10μm, and the average thickness of the polymer coating layer is 10nm. Component 3: 1mol / L LiPF 6 / DEC-EC (molar ratio is 1:1) electrolyte, produced by Beijing Chemical Plant. The solvent used in the spinning solution is N,N-dimethylformamide, the concentration of polyacrylonitrile in the spinning solution is 10wt%, the concentration of carbon nanofibers is 5wt%, and the electrospinning collection device adopts 80 mesh plain weave woven brass mesh , sieve size 0.18mm. The polymer fiber membrane obtained by electrospinning was dried in a vacuum oven at 50 °C for 8 h to remove residual ...

Embodiment 2

[0032]Component 1: polyvinylidene fluoride, molecular weight 5.3×105 g / mol (Mw), produced by Shanghai Sanaifu New Materials Co., Ltd. Component 2: Self-made multi-walled carbon nanotubes coated with methyl methacrylate, which were prepared by in-situ polymerization of TNM3 multi-walled carbon nanotubes produced by Chengdu Zhongke Times Nano Co., Ltd., with an outer diameter of 10 ~30nm, the average length is 10μm, and the average thickness of the polymer coating is 10nm. Component 3: 1mol / L LiPF6 / DEC-EC (molar ratio 1:1) electrolyte, produced by Beijing Chemical Plant. The solvent used in the spinning solution is N,N-dimethylformamide, the concentration of polyvinylidene fluoride in the spinning solution is 14wt%, the concentration of multi-walled carbon nanotubes is 3wt%, and the electrospinning collection device adopts a 60-mesh plain weave machine Woven brass mesh, mesh size 0.25mm. The polymer fiber membrane obtained by electrospinning was dried in a vacuum oven at 50 °C...

Embodiment 3

[0036] Component 1: polyethylene oxide, molecular weight 10 5 g / mol (Mw), produced by Shanghai Liansheng Chemical Company. Component 2: Self-made single-walled carbon nanotubes coated with methyl methacrylate, which are produced by TNS single-walled carbon nanotubes produced by Chengdu Zhongke Times Nano Co., Ltd. through an in-situ polymerization process. The outer diameter of the carbon nanotubes is 1 ~2nm, average length 10μm, polymer coating average thickness 10nm. Component 3: 1mol / L LiPF 6 / DEC-EC (molar ratio is 1:1) electrolyte, produced by Beijing Chemical Plant. The solvent used in the spinning solution is N,N-dimethylformamide, the concentration of polyethylene oxide in the spinning solution is 12wt%, the concentration of single-walled carbon nanotubes is 2wt%, and the electrospinning collection device adopts 70 mesh plain weave woven yellow Copper mesh, mesh size 0.22mm. The polymer fiber membrane obtained by electrospinning was dried in a vacuum oven at 50 °C...

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Abstract

The invention relates to a porous polymer electrolyte skeleton material having a grid patterning structure and doped by nanoparticles, and a method for preparing a gel polymer electrolyte through using the skeleton material, and belongs to the field of polymer lithium ion batteries. The method comprises the following steps: 1, dispersing the nanoparticles in a polymer electrostatic spinning liquid, and making a nanoparticle doped polymer nanometer fiber film through an electrostatic spinning technology by using a grid patterning receiving device; 2, drying the nanometer fiber film, cutting the nanometer fiber film, and carrying out laminating compaction to make the polymer gel electrolyte skeleton; and 3, putting the skeleton material in an electrolyte solution in a glove box, and carrying out activation and gelating. The gel polymer electrolyte maintains good electrochemical performances, has greatly improved mechanical performances, makes up the mechanical-electrochemical performance unbalance defect of the gel polymer electrolyte, meets assembling needs of button batteries, and can be used in secondary lithium ion batteries.

Description

Technical field [0001] The present invention involves a polymer electrolyte, especially the method of electrolytic skeleton material with a porous polymerization structure with a grid pattern, doped nanoparticles, and the method of preparing gel polymer electrolytes for skeleton materials.Lithium ion battery field. [0002] Background technique [0003] The polymer electrolyte not only has good ionic conduction, but also has the characteristics of light quality, corrosion resistance, and easy to form the unique to high molecular materials. It is in line with the development trend of safe, efficient and environmental protection. In recent yearsAge battery, fuel cells and supercapacitors and other chemical power supply. [0004] From a practical perspective, the polymer electrolyte of the lithium -ion battery must be met: 1) the high conductivity rate, generally at room temperature to conduct an ionic conductivity to reach or exceed 10 -3 S · cm -1 ; 2) Migration of high ions, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/058
CPCB82Y30/00H01M10/0525H01M10/0565H01M10/058H01M2300/0085Y02E60/10Y02P70/50
Inventor 隋刚毕海涛杨小平张珍珍
Owner BEIJING UNIV OF CHEM TECH
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