Single ion conductor polymer solid electrolyte membrane and preparation method and application thereof

A technology of solid electrolyte membrane and conductive polymer, which is applied in the field of electrochemical devices to achieve the effects of reducing concentration polarization, having good commercial prospects and improving cycle life.

Active Publication Date: 2021-08-24
CHINA LUCKY FILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to make the solid electrolyte membrane have a high lithium ion transfer number and lithium ion conductivity still needs to be further improved.

Method used

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  • Single ion conductor polymer solid electrolyte membrane and preparation method and application thereof
  • Single ion conductor polymer solid electrolyte membrane and preparation method and application thereof
  • Single ion conductor polymer solid electrolyte membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) Synthesis of lithium-containing monomers with formula 2 structure

[0060] First, dissolve 0.35g of sodium dodecylsulfonate in 10mL of disodium hydrogen phosphate buffer solution (pH 4.5); then add 10mM polyetheramine and keep stirring until it is completely dissolved; finally add 0.5U / mL The laccase was used as a catalyst to initiate the polymerization reaction. Put the reaction container into a freezer at 5°C and let it stand for more than 24h. During the reaction, the suspension was tested by ultraviolet-visible light to monitor the progress of the reaction. After the reaction, an equal volume of acetone (10 mL) was added to the reaction solution to break the emulsion, and the resulting precipitate was collected by centrifugation and filtration, and washed with acetone and deionized water to remove oligomers and other impurities. The final product was dried in a drying oven at 60° C. to obtain terminal-modified sodium polyetherimide sulfonate.

[0061] Fully d...

Embodiment 2

[0076] The difference with embodiment 1 is:

[0077] (2) Preparation of Single Ion Conductor Polymer Solid Electrolyte Membrane

[0078] The lithium-containing monomer prepared by the above 27g, 15g crosslinking monomer trimethylolpropane triglycidyl ether, 15g lithium-ion-conducting polymer polyethylene oxide (PEO), 10g plasticizer tetraethylene glycol dimethyl ether , 7.5g inorganic particles Li 1.5 A l0.5 Ge 1.5 P 3 o 12 Dissolve and uniformly disperse in acetonitrile solvent in advance, add lithium salt LiTFSi, the addition ratio is 1:8 to the molar ratio of the EO group (that is, the lithium ion complex dissociation group) in the polymer and the monomer, and obtain the slurry .

Embodiment 3

[0080] The difference with embodiment 1 is:

[0081] (2) Preparation of Single Ion Conductor Polymer Solid Electrolyte Membrane

[0082]The lithium-containing monomer prepared by the above 10g, 20g crosslinking monomer trimethylolpropane triglycidyl ether, 2g lithium-ion-conducting polymer polyethylene oxide (PEO), 10g plasticizer tetraethylene glycol dimethyl ether , 10 g of inorganic particles Li 1.5 A l0.5 Ge 1.5 P 3 o 12 Dissolve separately in advance and evenly disperse in acetonitrile solvent, add lithium salt LiTFSi, the addition ratio is 1:16 to the molar ratio of the EO group in the polymer and the monomer (that is, the lithium ion complex dissociation group), to obtain a slurry .

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Abstract

The invention discloses a single-ion conductor polymer solid electrolyte membrane as well as a preparation method and application thereof. The single-ion conductor polymer solid electrolyte membrane comprises the following components in parts by weight of 5-50 parts of a lithium-containing monomer, 5-25 parts of a crosslinking monomer, 1-30 parts of a polymer, 0-20 parts of a plasticizer, 0-15 parts of inorganic particles and lithium salt, wherein the molar ratio of the lithium salt to the sum of lithium ion complexing dissociation groups in each component is 1: (1-16). The single-ion conductor polymer solid-state electrolyte membrane has higher ionic conductivity and lithium ion transference number, is simple in preparation process, and can be used for a solid-state lithium battery to reduce the concentration polarization, improve the specific discharge capacity and prolong the cycle life.

Description

technical field [0001] The invention belongs to the field of electrochemical devices, in particular, it relates to a single-ion conductor polymer solid-state electrolyte membrane and its preparation method and application. Background technique [0002] At present, lithium-ion batteries have become the most important energy storage devices. Traditional lithium batteries use organic electrolytes, which have unstable chemical properties, are highly flammable and highly corrosive, and pose potential safety hazards. Solid-state lithium batteries have become the future of batteries. One of the technical directions, and solid electrolyte is one of the most critical materials. Solid-state electrolytes include oxides, sulfides, polymers, etc. Among them, solid-state polymer electrolytes have the advantages of inhibiting the growth of lithium dendrites, reducing the reactivity between the electrolyte and the electrode, being safe, reliable, and easy to process. Electrolyte defects, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/0525
CPCH01M10/0565H01M10/0525H01M2300/0082Y02P70/50
Inventor 刘邵帅赵义丽许剑臧海洲安曼
Owner CHINA LUCKY FILM CORP
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