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Gel polymer electrolyte for magnesium ion battery and preparation method of gel polymer electrolyte

A gel polymer and electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as unfavorable magnesium ion transmission, and achieve the effects of promoting rapid transmission, delaying nucleation rate, and enriching porosity

Pending Publication Date: 2022-08-05
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the surface of natural polymer materials contains many polar functional groups, and these functional groups are easy to form hydrogen bonds when the material self-assembles into a film, and then form a dense biomass film, which is not conducive to the transport of magnesium ions
Therefore, it is still a great challenge to design and prepare a high-performance bio-based gel polymer electrolyte for Mg-ion batteries.

Method used

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  • Gel polymer electrolyte for magnesium ion battery and preparation method of gel polymer electrolyte
  • Gel polymer electrolyte for magnesium ion battery and preparation method of gel polymer electrolyte
  • Gel polymer electrolyte for magnesium ion battery and preparation method of gel polymer electrolyte

Examples

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Effect test

Embodiment 1

[0043]A preparation method of a high-performance gel polymer electrolyte for magnesium ion batteries, comprising the following steps:

[0044] (a) Preparation of MC

[0045] Weigh 2g of cellulose into a beaker, then add 5ml of 1M NaOH / 6M KSCN solution, swell at room temperature for 30min, and filter with suction; transfer the obtained filter cake to a flask, add 20ml of acrylonitrile, and react at 35°C for 2h. After the reaction, the reactant was neutralized with 1M glacial acetic acid to neutrality, and filtered with suction; the product was washed alternately with ethanol and distilled water, and dried in vacuum at 60°C. Finally got the MC product.

[0046] (b) Preparation of MC films

[0047] Weigh 1.0g of MC powder and 10ml of DMAC into a beaker, heat and stir at 70°C for 6 hours to obtain a uniform and stable MC casting solution; pour the prepared casting solution on the surface of the glass plate, and use a scraper to remove the casting solution. Scrape coated on a gl...

Embodiment 2

[0051] A preparation method of a high-performance gel polymer electrolyte for magnesium ion batteries, comprising the following steps:

[0052] (a) Preparation of MC

[0053] Weigh 2g of cellulose into a beaker, then add 5ml of 1M NaOH / 6M KSCN solution, swell at room temperature for 60min, and filter with suction; transfer the obtained filter cake to a flask, add 25ml of acrylonitrile, and react at 38°C for 2.5h . After the reaction, the reactant was neutralized with 1M glacial acetic acid to neutrality, and filtered with suction; the product was washed alternately with ethanol and distilled water, and dried under vacuum at 70°C. Finally got the MC product.

[0054] (b) Preparation of MC films

[0055] Weigh 1.1g of MC powder and 10ml of DMAC into a beaker, heat and stir at 60°C for 7 hours to obtain a uniform and stable MC casting solution; pour the prepared casting solution on the surface of the glass plate, and use a scraper to remove the casting solution. Scrape coated...

Embodiment 3

[0059] A preparation method of a high-performance gel polymer electrolyte for magnesium ion batteries, comprising the following steps:

[0060] (a) Preparation of MC

[0061] Weigh 2g of cellulose into a beaker, then add 5ml of 1M NaOH / 6M KSCN solution, swell at room temperature for 50min, and filter with suction; transfer the obtained filter cake to a flask, add 23ml of acrylonitrile, and react at 36°C for 2h. After the reaction was completed, the reactant was neutralized with 1M glacial acetic acid, and filtered with suction; the product was washed alternately with ethanol and distilled water, and dried at 65°C under vacuum. Finally got the MC product.

[0062] (b) Preparation of MC films

[0063] Weigh 1.05g of MC powder and 10ml of DMAC into a beaker, heat and stir at 65°C for 6.5h to obtain a uniform and stable MC casting solution; pour the prepared casting solution on the surface of the glass plate, and use a scraper to remove the casting solution. The liquid was scra...

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Abstract

The invention discloses a gel polymer electrolyte for a magnesium ion battery and a preparation method of the gel polymer electrolyte, and belongs to the technical field of magnesium ion batteries. The preparation method of the gel polymer electrolyte for the magnesium ion battery comprises the following steps: reacting cellulose with acrylonitrile to obtain modified cellulose MC; the preparation method comprises the following steps: dissolving modified cellulose MC in an organic solvent to form a uniform and stable MC membrane casting solution, coating a glass plate with the MC membrane casting solution, soaking in a coagulating bath, and drying after the membrane is formed and falls off to obtain a modified cellulose membrane; and S2, soaking and activating the modified cellulose membrane obtained in the step S2 in an LX-144 electrolyte, and gelatinizing to obtain the gel polymer electrolyte. The gel polymer electrolyte for the high-performance magnesium ion battery prepared by the method provided by the invention has a series of advantages of high conductivity, excellent electrochemical performance and the like, and the electrochemical performance of the magnesium ion battery can be remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of magnesium ion batteries, and particularly relates to a gel polymer electrolyte for magnesium ion batteries and a preparation method thereof. Background technique [0002] With the continuous improvement of people's living standards, higher requirements are placed on the safety and energy density of energy devices, especially in the fields of mobile electronic devices, electric vehicles, and large-scale energy storage. However, lithium-ion batteries have long been plagued by problems such as lack of lithium resources and safety, and have become more controversial in recent years. Therefore, it is imperative to develop new low-cost and high-safety secondary battery chemistries. In the periodic table of elements, magnesium and lithium are in the diagonal position, have similar chemical properties, and are more abundant in the earth's crust, much higher than lithium elements, so the raw materials of magnesium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565
CPCH01M10/0565H01M2300/0085Y02P70/50
Inventor 付宇王永勤
Owner NANJING FORESTRY UNIV
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