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Full-solid-state electrolyte material, preparation method and application thereof

An electrolyte material and all-solid-state technology, applied in circuits, electrical components, secondary batteries, etc., can solve the problem of low conductivity of solid-state electrolytes and achieve mild conditions, strong stability, and good repeatability

Active Publication Date: 2019-06-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The first purpose of the present invention is to provide an all-solid electrolyte material to solve the technical problem of low conductivity of solid electrolytes in the prior art

Method used

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  • Full-solid-state electrolyte material, preparation method and application thereof
  • Full-solid-state electrolyte material, preparation method and application thereof
  • Full-solid-state electrolyte material, preparation method and application thereof

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Embodiment 1

[0081] This embodiment provides an all-solid electrolyte material and a preparation method thereof. The all-solid electrolyte material of this embodiment is filled with polyethylene glycol and lithium perchlorate in the pores of the covalent organic framework material of the cationic framework.

[0082] Specifically, the covalent organic framework material of the cationic framework is EB-COF-ClO 4 , and its preparation method includes the following steps: 118 mg of ethidium bromide (EB), 42 mg of 1,3,5-triformylphloroglucinol (TFP), 1 mL of mesitylene, 1 mL of dioxane, and 0.2 mL of aqueous acetic acid (6M), put it into a heat-resistant glass tube with an outer diameter of 20cm and an inner diameter of 18cm, freeze and vacuum with liquid nitrogen, thaw, repeat three times, seal the glass mouth with a high-temperature flame gun, heat at 120 ° C for three days, and collect the precipitate by centrifugation , washed with anhydrous tetrahydrofuran, replaced with methanol, so as to...

Embodiment 2

[0086] This embodiment provides an all-solid electrolyte material and a preparation method thereof. The all-solid electrolyte material of this embodiment is filled with polyethylene glycol and lithium perchlorate in the pores of the covalent organic framework material of the anion skeleton.

[0087] Specifically, the covalent organic framework material of the anionic framework is CD-COF-Li, and the preparation method includes the following steps: adding γ-cyclodextrin (γ-CD) 0.1373 to a microwave reaction flask in a glove box filled with argon gas g. Lithium hydroxide 0.0132g, trimethyl borate 59.5μL, ultra-dry mesitylene 7mL, ultra-dry N,N-dimethylformamide 8mL, heated and stirred for 4h at 120°C to obtain a turbid liquid, centrifuged The solid was collected, washed with DMF and acetone, heated and activated under vacuum at 100 °C for 12 h to obtain a covalent organic framework material CD-COF-Li with an anionic skeleton.

[0088] The preparation method of the all-solid-state...

Embodiment 3

[0091] This embodiment provides an all-solid-state electrolyte material and a preparation method thereof. The all-solid-state electrolyte material of this embodiment is filled with polyethylene glycol and perchloric acid in the pores of a covalent organic framework material with a two-dimensional neutral framework. lithium.

[0092] Specifically, the covalent organic framework material of the two-dimensional neutral framework is COF-5, and the preparation method includes the following steps: 25 mg of 1,4-benzenediboronic acid (BDBA), 2,3,6,7,10,11 - Hexahydroxytriphenylene hydrate (HHTP) 32mg, 1mL mesitylene, 1mL dioxane, put into a heat-resistant glass tube with an outer diameter of 20cm and an inner diameter of 18cm, refrigerated and evacuated with liquid nitrogen, thawed, and repeated three times, using high temperature The glass mouth was sealed with a flame gun, heated at 100 °C for three days, the precipitate was collected by centrifugation, washed with anhydrous acetone...

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Abstract

The invention relates to the technical field of battery preparation, in particular to a full-solid-state electrolyte material, a preparation method and application thereof. The full-solid-state electrolyte material is filled with polyethylene glycol and a lithium salt in pore passages of a porous organic frame material. The preparation method comprises the following steps: dissolving polyethyleneglycol and the lithium salt into a solvent, mixing with the porous organic frame material uniformly, and removing the solvent to obtain the full-solid-state electrolyte material. According to the full-solid-state electrolyte material, abundant oxygen sites are arranged on the chain of the material by using the chain polymer such as polyethylene glycol, the material can react with lithium ions effectively, the transport of lithium ions in the pore passages of the porous material is promoted by using the oscillation of the material, and lithium exists in the pore passages of the porous materialin the form of lithium ions, so that the conductivity and transport number of the obtained electrolyte material are improved, the material can serve as a diaphragm material of lithium ion batteries, and the material is high in safety and high in stability at high temperature.

Description

technical field [0001] The invention relates to the technical field of battery preparation, in particular to an all-solid-state electrolyte material and a preparation method and application thereof. Background technique [0002] At present, polymer electrolytes have a wide range of applications in power chemistry, electroluminescence, electrochromic and electrochemical sensing due to their advantages of high energy density, high space utilization, good cycle performance, and no dew. In particular, lithium-ion batteries assembled by replacing traditional organic liquid electrolytes with polymer electrolytes can avoid the safety problems caused by organic electrolytes volatile, leaking, and even burning at high temperatures. Positive and negative ions can move simultaneously in the polymer electrolyte system. Usually the negative ion migration number is higher than the cation migration number. In this way, under the action of an external electric field, a certain concentrati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/0525
CPCY02E60/10
Inventor 冯霄王博郭振彬张媛媛
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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