A hydroxyapatite ultra-long nanowire-based high temperature resistant battery separator and its application

A hydroxyapatite, battery separator technology, applied in nanotechnology, nanotechnology, battery pack components and other directions, can solve the problems of poor electrolyte wettability, low thermal temperature stability, low porosity, etc., to achieve good wettability, Good flame retardant performance and the effect of improving performance

Active Publication Date: 2019-11-19
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems of existing polyolefin battery separators such as low porosity, poor wettability to electrolyte, and low heat-temperature stability, the purpose of the present invention is to provide a membrane with better electrolyte infiltration and adsorption performance, uniform pore distribution, Faster ion transmission and diffusion capabilities, good thermal stability and flame-retardant performance of the battery separator to improve the temperature resistance and flame-retardant performance of the battery separator, improve the wetting and adsorption performance of the separator to the electrolyte, and then improve the battery life. Performance and Security

Method used

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  • A hydroxyapatite ultra-long nanowire-based high temperature resistant battery separator and its application
  • A hydroxyapatite ultra-long nanowire-based high temperature resistant battery separator and its application
  • A hydroxyapatite ultra-long nanowire-based high temperature resistant battery separator and its application

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preparation example Construction

[0028] The ultra-long hydroxyapatite nanowires of the present invention can be prepared by solvothermal method, hydrothermal method or any suitable method, which can be prepared by referring to published patents and literature reports, such as: Zhu Yingjie, Lu Bingqiang , Feng Chen, High-flexibility, high-temperature, non-combustible hydroxyapatite paper and its preparation method, Patent No. ZL201310687363.2; Yong-Gang Zhang, Ying-Jie Zhu Feng Chen, Jin Wu, Materials Letters, 144, 135-137 (2015 ); Ying-YingJiang,Ying-Jie Zhu,Feng Chen,Jin Wu,Ceramics International,41,6098-6102(2015);Heng Li,Ying-Jie Zhu,Ying-Ying Jiang,Ya-Dong Yu,Feng Chen, Li-YingDong, Jin Wu, ChemNanoMat, 3, 259-268 (2017). The solvothermal method includes: (1) mixing a fatty acid and an alcohol, adding a water-soluble calcium salt aqueous solution and a strong alkali aqueous solution under stirring to form a fatty acid calcium precursor, the fatty acid being a medium-chain or long-chain fatty acid, preferab...

Embodiment 1

[0036] At room temperature, take 10g of hydroxyapatite ultra-long nanowire slurry with a concentration of 3mg / g and disperse it in 40mL of deionized water, add 0.6g of an aqueous suspension of plant fiber with a concentration of 5‰, and stir for 30 minutes. It is placed on a sand core funnel with a diameter of 45 mm for suction filtration. After separation and drying, a piece of hydroxyapatite ultra-long nanowire-based high-temperature battery diaphragm with a diameter of 45 mm and a thickness of about 49 microns is obtained.

Embodiment 2

[0038] At room temperature, disperse 200g of 3mg / g hydroxyapatite ultra-long nanowire slurry in 1200mL of deionized water, stir evenly, then add 18g of 5‰ plant fiber aqueous suspension and continue to stir for 30 minutes. It is placed on a 20 cm diameter slide filter and separated, and after drying, a hydroxyapatite ultra-long nanowire-based composite battery separator with a diameter of 20 cm and a thickness of about 60 microns is obtained. figure 1 In (c) and (d) are the digital photos of the hydroxyapatite ultra-long nanowire-based composite battery diaphragm prepared in this example before and after burning on the flame of an alcohol lamp. It can be seen that the hydroxyapatite ultra-long nanowire-based The high temperature battery separator has excellent high temperature resistance and flame retardant properties.

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Abstract

The invention relates to a hydroxyapatite ultra-long nanowire-based high-temperature-resistant battery separator and its application. The composition of the hydroxyapatite ultra-long nano-wire-based high-temperature-resistant battery separator includes: 0.1-100wt% hydroxyapatite ultra- Long nanowires, 0-30wt% inorganic additives and 0-50wt% fiber additives, preferably including 1-99wt% hydroxyapatite ultra-long nanowires, 0-30wt% inorganic additives and 1-50wt% fiber additives. The technical problem to be solved by the invention is to improve the high temperature resistance and flame retardancy of the battery diaphragm, improve the infiltration and adsorption performance of the battery diaphragm to the electrolyte, and further improve the performance and safety of the battery.

Description

Technical field [0001] The invention relates to a hydroxyapatite ultra-long nanowire-based high-temperature battery diaphragm and its application, and belongs to the field of battery material preparation. Background technique [0002] Lithium batteries (including lithium ion batteries and lithium metal batteries) and sodium batteries (including sodium ion batteries and sodium metal batteries) have many advantages such as high energy density, high power density and long cycle life, so they are used in portable electronic devices and new power batteries. And energy storage batteries are widely used in fields. The battery is mainly composed of four parts: positive electrode material, negative electrode material, separator and electrolyte. The cost of separator as a key component inside the battery accounts for about 1 / 5 of the total cost of the battery. In the battery, the separator mainly has the functions of preventing direct contact between the positive and negative electrodes, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/14H01M2/16B82Y30/00H01M50/403H01M50/431H01M50/44
CPCY02E60/10
Inventor 朱英杰李恒吴进董丽颖
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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