Polyacrylonitrile/cellulose/hydroxyapatite composite diaphragm as well as preparation method and application thereof

A technology of hydroxyapatite and polyacrylonitrile, which is applied in fiber types, fiber treatment, textiles and papermaking, etc., can solve the problems of poor thermal stability and electrolyte compatibility of polyolefin separators, and achieve excellent thermal stability and porosity Reasonable distribution and the effect of meeting the needs of mass production

Active Publication Date: 2022-03-04
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to propose a polyacrylonitrile / cellulose / hydroxyapatite composite diaphragm and its preparation method and application, to solve Solved the problems of thermal stability and poor electrolyte compatibility of existing polyolefin separators

Method used

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  • Polyacrylonitrile/cellulose/hydroxyapatite composite diaphragm as well as preparation method and application thereof
  • Polyacrylonitrile/cellulose/hydroxyapatite composite diaphragm as well as preparation method and application thereof
  • Polyacrylonitrile/cellulose/hydroxyapatite composite diaphragm as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Add 10.49g of vacuum-dried polyacrylonitrile powder into 100.00ml of N,N-dimethylformamide solvent, and magnetically stir at 60°C for 8 hours to obtain polyacrylonitrile spinning solution; use a 10ml disposable medical syringe to extract 5ml of the above-mentioned spinning solution was placed in the injection device of the electrospinning apparatus, and the spinning parameters of positive voltage 16.00KV, negative voltage 2.00KV, receiving distance 15cm, and injection speed 0.09mm / min were adopted. The needle was electrospun for 4 hours to prepare a polyacrylonitrile fiber film with an average diameter of 310 nm. The film was cut into 10cm in length and width, placed between stainless steel plates, clamped with G-shaped clamps, and placed in a blast drying oven at 120°C for 35 minutes to obtain polypropylene with a thickness in the range of 30-55 μm. Nitrile nanofiber membrane.

[0038] 1.50 g of nano-hydroxyapatite and 0.09 g of polyethylene glycol 2000 dispersant wer...

Embodiment 2

[0040] Add 10.49 g of vacuum-dried polyacrylonitrile powder into 100.00 ml of N,N-dimethylformamide solvent, and magnetically stir at 60° C. for 8 hours to prepare a polyacrylonitrile spinning solution. Use a 10ml disposable medical syringe to extract 5ml of the above-mentioned spinning liquid, place it in the injection device of the electrospinning instrument, and take a spinning solution with a positive voltage of 16.00KV, a negative voltage of 2.00KV, a receiving distance of 15cm, and a injection speed of 0.09mm / min. Silk parameters, electrospinning was carried out for 4 hours with a No. 20 spinning needle, and a polyacrylonitrile fiber silk film with an average diameter of 310 nm was prepared. The film was cut into 10cm in length and width, placed between stainless steel plates, clamped with G-shaped clamps, and placed in a blast drying oven at 120°C for 35 minutes to obtain polypropylene with a thickness in the range of 30-55 μm. Nitrile fiber membrane.

[0041] 0.75 g o...

Embodiment 3

[0043] Add 10.49 g of vacuum-dried polyacrylonitrile powder into 100.00 ml of N,N-dimethylformamide solvent, and magnetically stir at 60° C. for 8 hours to prepare a polyacrylonitrile spinning solution. Use a 10ml disposable medical syringe to extract 5ml of the above-mentioned spinning liquid, place it in the injection device of the electrospinning instrument, and take a spinning solution with a positive voltage of 16.00KV, a negative voltage of 2.00KV, a receiving distance of 15cm, and a injection speed of 0.09mm / min. Silk parameters, electrospinning was carried out for 4 hours with a No. 20 spinning needle, and a polyacrylonitrile fiber silk film with an average diameter of 310 nm was prepared. The film was cut into 10cm in length and width, placed between stainless steel plates, clamped with G-shaped clamps, and placed in a blast drying oven at 120°C for 35 minutes to obtain polypropylene with a thickness in the range of 30-55 μm. Nitrile fiber membrane.

[0044] 2.25 g o...

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Abstract

The invention discloses a polyacrylonitrile/cellulose/hydroxyapatite composite diaphragm as well as a preparation method and application thereof. The preparation method of the polyacrylonitrile/cellulose/hydroxyapatite composite diaphragm comprises the following steps: (1) preparing a polyacrylonitrile nanofiber membrane by adopting electrostatic spinning and hot pressing treatment; (2) adding hydroxyapatite and a dispersing agent into an organic solvent, stirring, and ultrasonically and uniformly mixing to obtain a dispersion liquid of hydroxyapatite; adding cellulose into the dispersion liquid of hydroxyapatite, and uniformly mixing to prepare a cellulose solution of hydroxyapatite; and (3) dipping the polyacrylonitrile nanofiber membrane obtained in the step (1) into the cellulose solution of hydroxyapatite obtained in the step (2), and then taking out the polyacrylonitrile nanofiber membrane and carrying out vacuum drying. The preparation method provided by the invention is simple, convenient and efficient, overcomes the defects of poor thermal stability, poor electrolyte compatibility and the like of polyolefin diaphragms, meets the requirements of large-scale production, and has important market value.

Description

technical field [0001] The invention belongs to the field of lithium-ion batteries, and in particular relates to a polyacrylonitrile / cellulose / hydroxyapatite composite diaphragm and a preparation method and application thereof. Background technique [0002] The development of sustainable energy storage technology is one of the powerful measures to alleviate the contradiction between economic development and environmental protection. As a rechargeable battery, lithium battery is an important development direction of electric energy storage technology. Lithium batteries are composed of positive electrode, negative electrode, electrolyte, separator and external packaging materials; among them, the separator not only serves to isolate the positive and negative electrodes, avoiding direct contact to cause short circuit, causing safety accidents such as battery fire and explosion; it also has pores to ensure that the battery is Lithium ions can smoothly migrate back and forth on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/403H01M10/0525H01M50/414H01M50/417H01M50/44D06M11/71D06M15/07D06M101/28
CPCH01M50/403H01M50/44H01M50/417H01M50/414H01M10/0525D06M11/71D06M15/07D06M2101/28Y02E60/10
Inventor 王翔陈伟平王钧段华军杨小利
Owner WUHAN UNIV OF TECH
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