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Preparation method of electrospray battery

A technology of electrospraying and batteries, which is applied to battery components, devices for coating liquid on the surface, circuits, etc., can solve the problems of single battery form, complicated and time-consuming process, etc., and achieve uniform and dense materials, simple process, The effect of high raw material utilization

Pending Publication Date: 2022-04-12
XIFENG 2D FUJIAN MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the process is cumbersome and time-consuming, and the battery form is single, so lithium-ion batteries face challenges in terms of production process and form diversity

Method used

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  • Preparation method of electrospray battery
  • Preparation method of electrospray battery
  • Preparation method of electrospray battery

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Experimental program
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preparation example Construction

[0028] Such as figure 1 As shown, the present invention provides a method for preparing an electrospray battery. The preparation method prepares a nanofiber diaphragm by electrospinning, and sprays positive and negative materials on both sides of the nanofiber diaphragm by electrospraying to prepare a Integrated electrodes. Its specific preparation process includes:

[0029] S01: Preparation of nanofiber separator by electrospinning.

[0030] First, dissolve 5-10% of the membrane polymer material in an organic solvent and stir at room temperature for 10-20h to obtain a membrane electrospinning solution; then, put the solution in a syringe and inject 0.1-0.5mL h -1 The constant feed rate injection, the DC voltage and the distance between the injection needle and the collector are 10-20kV and 10-20cm respectively; finally, the fibers are stripped from the collector and placed in air at 1-5°C min -1 The heating rate is increased to 200-250° C., and the nanofiber separator is o...

Embodiment 1

[0037] S01: Preparation of separator by electrospinning: First, 8% polyacrylonitrile (PAN mw=150 000) was dissolved in N,N-dimethylformamide (DMF) solution and stirred overnight at room temperature to obtain PAN electrospinning solution. Then, the solution was filled in a syringe and dispensed with 0.1 mL h -1 The constant feed rate injection of , the DC voltage and the distance between the injection needle and the collector were 15 kV and 15 cm, respectively. Finally, the fibers were stripped from the collector and kept in air at 2 °C min -1 The heating rate was increased to 220 °C, and the PAN separator was obtained after annealing at constant temperature for 2 hours.

[0038] S02: Preparation of integrated electrodes by electrospraying: First, lithium iron phosphate (LiFePO 4 ) (70wt%), carbon black (Super P) (20wt%) and polyvinylidene fluoride (PVDF) (10wt%) were dissolved in N-methyl-2-pyrrolidone (NMP) solvent and heated at room temperature Thoroughly stir to obtain a ...

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Abstract

The invention provides a preparation method of an electrospray battery. The preparation method comprises the following steps: preparing a diaphragm through electrostatic spinning; respectively electrically spraying positive and negative electrode materials on two surfaces of the diaphragm to prepare an integrated electrode; cutting the integrated electrode; and infiltrating with an electrolyte and assembling the battery. According to the method, the PAN diaphragm is prepared through an electrostatic spinning method, the diaphragm has high flexibility, and a porous nanofiber membrane generated by the diaphragm can promote absorption of electrolyte. The integrated electrode is prepared through an electric spraying method, then the integrated electrode formed after uniform rolling can be directly cut for battery assembly, the material sprayed on the diaphragm is more uniform and compact through electric spraying, and uniform compaction treatment and high loading capacity can be realized. The preparation method is simple in process, and the production cost and the production time are greatly reduced. And meanwhile, the method has the advantages of high raw material utilization rate, high material compatibility, suitability for preparation of various electrodes and the like.

Description

technical field [0001] The invention relates to the fields of a metal ion battery preparation method and the like, in particular to a battery preparation method. Background technique [0002] Lithium-ion batteries (LIBs) play an important role in numerous applications such as portable electronics, electric vehicles, and grid storage systems. The safety performance of lithium-ion battery products is directly related to the life and health of consumers. The production process of lithium batteries is quite complicated. Lithium battery production has high requirements for equipment performance, precision, stability and automation. Although LIBs are already commercially available, cost, safety, and energy density limit their further development. Traditional LIBs are fabricated by winding and stacking, while battery components such as anodes, cathodes, and separators need to be fabricated individually, then they are packaged in a fixed shape and size, and finally injected with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/403H01M50/44B05D1/04D04H1/728
Inventor 胡转鲁兵安许志
Owner XIFENG 2D FUJIAN MATERIAL TECH CO LTD