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A diaphragm with multi-level functional module coupling complementation and preparation method thereof

A technology of functional modules and diaphragms, applied in the direction of separators/films/diaphragms/spacers, structural parts, electrical components, etc., can solve the problems of cumbersome preparation process, unmentioned electrochemical performance of coated diaphragms, etc. Side reactions, the effect of improving the interface between the separator and the electrode, and improving the stability

Active Publication Date: 2022-01-04
上海大学浙江嘉兴新兴产业研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to prepare polymerized azacrown ether first, and the preparation process is relatively cumbersome. At the same time, the coating is only a single polymer coating, and the basic thermal stability of the coating separator still needs to be improved. At the same time, the electrical properties of the coating separator Chemical properties are not mentioned

Method used

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  • A diaphragm with multi-level functional module coupling complementation and preparation method thereof
  • A diaphragm with multi-level functional module coupling complementation and preparation method thereof
  • A diaphragm with multi-level functional module coupling complementation and preparation method thereof

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Effect test

Embodiment 1

[0043] In this embodiment, a diaphragm with multi-level functional module coupling and complementarity is prepared, and the preparation steps include:

[0044] 15.00 g of tetraethyl orthosilicate (TEOS) and 135.00 g of ethyl acetate were stirred uniformly at room temperature to prepare a 10 wt % TEOS solution as a functional coating solution. Aluminum oxide (Al 2 o 3 ) ceramic coating to coat a polyethylene diaphragm (thickness: 24 μm; base film thickness: 16 μm; double-sided coating), soak it in the above-mentioned functional coating solution for 0.5 h; take out the diaphragm, wait for the ethyl acetate to volatilize naturally, Place the diaphragm in an acidic atmosphere of hydrochloric acid (HCl) and treat it at 30°C for 24 hours; soak and wash the diaphragm with deionized water for 0.5 hours twice, and then soak and wash the diaphragm with absolute ethanol for 0.5 hours; after the diaphragm is surface-dried It was subjected to vacuum treatment at 60°C for 12 hours, and a ...

Embodiment 2

[0047] In this embodiment, a diaphragm with multi-level functional module coupling and complementarity is prepared, and the preparation steps include:

[0048] 15.00 g of tetraethyl orthosilicate (TEOS) and 135.00 g of ethyl acetate were stirred uniformly at room temperature to prepare a 10 wt % TEOS solution as a functional coating solution. Aluminum oxide (Al 2 o 3 ) ceramic coating to coat a polyethylene diaphragm (thickness: 24 μm; base film thickness: 16 μm; double-sided coating), soak it in the above-mentioned functional coating solution for 0.5 h; take out the diaphragm, wait for the ethyl acetate to volatilize naturally, Expose the diaphragm to ammonia gas (NH 3 ) in an alkaline atmosphere at 30°C for 24h; soak and wash the diaphragm with deionized water twice for 0.5h, and then dip and wash the diaphragm with absolute ethanol for 0.5h; After 12 hours of treatment, a membrane with multi-level functional module coupling and complementarity was prepared.

[0049] The...

Embodiment 3

[0051] In this embodiment, a diaphragm with multi-level functional module coupling and complementarity is prepared, and the preparation steps include:

[0052] 15.00 g of tetraethyl orthosilicate (TEOS) and 135.00 g of ethyl acetate were stirred uniformly at room temperature to prepare a 10 wt % TEOS solution as a functional coating solution. Aluminum oxide (Al 2 o 3 ) ceramic coating to coat a polyethylene diaphragm (thickness: 24 μm; base film thickness: 16 μm; double-sided coating), soak it in the above-mentioned functional coating solution for 0.5 h; take out the diaphragm, wait for the ethyl acetate to volatilize naturally, Place the diaphragm at 60°C for 24 hours; soak and wash the diaphragm with deionized water for 0.5 hours twice, and then soak and wash the diaphragm with absolute ethanol for 0.5 hours; after the diaphragm is surface-dried, vacuum-treat it at 60°C for 12 hours , to prepare a complementary membrane with multi-level functional module coupling.

[0053...

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Abstract

The invention provides a diaphragm with multi-level functional modules coupled and complementary and a preparation method thereof. The invention effectively constructs a multi-level functional module of the diaphragm, and the functional interactions between the modules are coupled and complementary, wherein the multi-level functional module includes its structural multi-level Based on the concepts of multi-levelization and multi-level functions, the final separator can realize the improvement of the electrochemical performance of the lithium battery system and the performance of the battery.

Description

technical field [0001] The invention belongs to the technical field of lithium battery systems, and in particular relates to a diaphragm with multi-level functional module coupling and complementarity and a preparation method thereof. Background technique [0002] Compared with other electrochemical energy storage systems, lithium batteries have been commercialized and widely used in the field of new energy due to their many advantages (higher energy density, long life cycle, lower self-discharge effect, etc.). [0003] As one of the important components of lithium batteries (including positive electrode, negative electrode, diaphragm, and electrolyte), the separator can effectively prevent the short circuit caused by the contact between the positive electrode and the negative electrode, and at the same time allow lithium ions to be transported between the positive electrode and the negative electrode. The traditional commercialized lithium battery separator is mainly based ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/40H01M50/403H01M50/446H01M50/417H01M50/434
CPCY02E60/10
Inventor 施利毅袁帅王竹仪邱郑富
Owner 上海大学浙江嘉兴新兴产业研究院
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