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Metal oxide modified battery diaphragm with self-assembled three-dimensional structure as well as preparation method and application of metal oxide modified battery diaphragm

A three-dimensional structure, battery separator technology, applied in structural parts, battery pack parts, circuits, etc., can solve problems such as low exposure rate, and achieve the effect of promoting transmission, improving cycle stability, and improving photocatalytic activity

Pending Publication Date: 2021-12-10
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems and deficiencies of the traditional technology, the present invention provides a self-assembled three-dimensional structure metal oxide modified Battery separator and its preparation method and application

Method used

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  • Metal oxide modified battery diaphragm with self-assembled three-dimensional structure as well as preparation method and application of metal oxide modified battery diaphragm
  • Metal oxide modified battery diaphragm with self-assembled three-dimensional structure as well as preparation method and application of metal oxide modified battery diaphragm
  • Metal oxide modified battery diaphragm with self-assembled three-dimensional structure as well as preparation method and application of metal oxide modified battery diaphragm

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Embodiment 1

[0048] In this embodiment, a self-assembled three-dimensional structure of a metal oxide-modified battery separator (hereinafter referred to as a modified separator) and a preparation method thereof are described in detail, including the following steps:

[0049] (1) Preparation of metal-organic framework precursors: Cobalt nitrate hexahydrate and 2-methylimidazole were dissolved in 30 mL and 60 mL of methanol, respectively (the molar ratio of cobalt nitrate hexahydrate and 2-methylimidazole was 1:5) , mixed the above two solutions and ultrasonically reacted at 25 ° C for 1 h, after centrifugation, washing and drying, the cobalt-based metal organic framework precursor (hereinafter referred to as ZIF-67) was obtained;

[0050] (2) Preparation of local three-dimensional cross-linked metal oxide: ZIF-67 was annealed at 470 °C for 1 h at a heating rate of 5 °C / min in an air atmosphere to synthesize local three-dimensional cross-linked cobalt tetroxide (hereinafter referred to as co...

Embodiment 2

[0061] In this embodiment, a self-assembled three-dimensional structure of a metal oxide-modified battery separator (hereinafter referred to as a modified separator) and a preparation method thereof are described in detail, including the following steps:

[0062] (1) Preparation of metal-organic framework precursors: zinc nitrate hexahydrate and 2-methylimidazole were dissolved in 30 mL and 60 mL of methanol, respectively (the molar ratio of zinc nitrate hexahydrate and 2-methylimidazole was 1:5) , mixed the above two solutions and ultrasonically reacted at 25 °C for 1 h, and after centrifugal washing and drying, the zinc-based metal organic framework precursor (hereinafter referred to as ZIF-8) was obtained;

[0063] (2) Preparation of local three-dimensional cross-linked metal oxides: ZIF-8 was annealed at 470 °C for 1 h at a heating rate of 5 °C / min in an air atmosphere to synthesize local three-dimensional cross-linked zinc oxide (hereinafter referred to as ZnO). Zinc oxid...

Embodiment 3

[0066] In this embodiment, a self-assembled three-dimensional structure of a metal oxide-modified battery separator (hereinafter referred to as a modified separator) and a preparation method thereof are described in detail, including the following steps:

[0067] (1) Preparation of metal-organic framework precursor: Dissolve ferric chloride hexahydrate and terephthalic acid in 30 mL of N,N-dimethylformamide (wherein the molar ratio of ferric chloride hexahydrate and terephthalic acid is 2:1), stirred for 30min, then put the above solution into the reaction kettle and reacted at 110°C for 12h, after centrifugal washing and drying, the iron-based metal organic framework precursor (hereinafter referred to as Fe-MOF) was obtained;

[0068] (2) Preparation of local three-dimensional cross-linked metal oxides: Fe-MOF was annealed at 400 °C for 2 h at a heating rate of 2 °C / min in an air atmosphere to synthesize local three-dimensional cross-linked ferric oxide ( hereinafter referred...

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Abstract

The invention belongs to the technical field of preparation of organic and inorganic composite materials, and particularly relates to a metal oxide modified battery diaphragm with a self-assembled three-dimensional structure as well as a preparation method and application of the metal oxide modified battery diaphragm. The method comprises the steps of 1) preparing a metal organic framework precursor; (2) preparing a local three-dimensional cross-linked metal oxide; and 3) preparing the modified diaphragm, specifically, mixing and grinding the local three-dimensional cross-linked metal oxide prepared in the step 2), an adhesive and a solvent, uniformly coating one side of a PP / PE / PP diaphragm, and drying to obtain the metal oxide modified battery diaphragm with a self-assembled three-dimensional structure. Through the limited structure of the metal oxide, the metal oxide is compounded with the PP / PE / PP diaphragm to be applied to a lithium-sulfur battery, so that polysulfide can be effectively anchored, the transmission efficiency of lithium ions can be ensured, and the cycling stability of the lithium-sulfur battery is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of organic-inorganic composite materials, and in particular relates to a self-assembled three-dimensional structure metal oxide-modified battery diaphragm and its preparation method and application. Background technique [0002] With the rapid development of fields such as drones, electric vehicles, and military portable power supplies, new energy storage technologies with high energy density are urgently needed, and the energy density of lithium-ion batteries is approaching the limit. Therefore has a high theoretical capacity (1672mAh g -1 ) Lithium-sulfur batteries have begun to enter people's field of vision and are expected to become the next generation of high-energy storage batteries. However, lithium-sulfur batteries still have some problems, such as volume expansion of sulfur, poor conductivity of sulfur, and dissolution of polysulfides. Especially the dissolution of polysulfides, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/403H01M50/446
CPCH01M50/403H01M50/446Y02E60/10
Inventor 王贤保伍丽萍陈子和
Owner HUBEI UNIV
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