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
CN114142159AActive Publication Date: 2022-03-04WUHAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV OF TECH
Publication Date
2022-03-04

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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.
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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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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