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A kind of sulfur-containing polymer solid-state electrolyte and its preparation method and application

A technology of solid electrolyte and polymer, which is applied in the direction of composite electrolyte, electrolyte battery manufacturing, non-aqueous electrolyte battery, etc., and can solve the problem of low lithium ion transmission efficiency

Active Publication Date: 2021-09-14
柔电(武汉)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above technical deficiencies, propose a sulfur-containing polymer solid state electrolyte and its preparation method and application, and solve the technical problem of low lithium ion transmission efficiency in the prior art

Method used

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  • A kind of sulfur-containing polymer solid-state electrolyte and its preparation method and application
  • A kind of sulfur-containing polymer solid-state electrolyte and its preparation method and application
  • A kind of sulfur-containing polymer solid-state electrolyte and its preparation method and application

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preparation example Construction

[0027] For the second solution of the present invention, the present invention provides a kind of preparation method of sulfur-containing polymer solid state electrolyte, and above-mentioned preparation method comprises the following steps:

[0028] S1: Mix the dimercapto monomer and the diene monomer to obtain the first mixed solution;

[0029] S2: Add lithium salt to the above-mentioned first mixed solution to obtain the second mixed solution after fully dissolving it;

[0030] S3: Add an initiator to the above-mentioned second mixed solution, and mix uniformly to obtain a precursor solution;

[0031] S4: Transfer the above-mentioned precursor solution to a porous support material for reaction to obtain the above-mentioned sulfur-containing polymer solid electrolyte.

[0032] In the present invention, mercapto-olefin click chemistry is used to prepare sulfur-containing polymer solid-state electrolyte, which has the following advantages compared with other methods:

[0033]...

Embodiment 1～5

[0048] Examples 1 to 5 respectively provide 5 different sulfur-containing solid polymer electrolytes and 5 corresponding solid lithium batteries, which are obtained through the above steps. The specific raw material proportions in the sulfur-containing solid polymer electrolyte and the solid-state lithium battery preparation method in Examples 1 to 5 are shown in Table 1; the room temperature ionic conductivity and electrochemical See Table 2 for the window.

[0049] Table 1

[0050]

[0051]

[0052] Table 2

[0053]

[0054] It can be seen from Table 1 and Table 2 that the room temperature ionic conductivity of the obtained sulfur-containing polymer solid electrolyte is 2×10 -5 ~5.0×10 -4 S / cm, the electrochemical window is 4.0~4.5V, shows that the sulfur-containing polymer solid electrolyte provided by the present invention has higher lithium ion conductivity and wider electrochemical window; meanwhile, it can also be seen that the lithium ion content If it is ...

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Abstract

The invention discloses a sulfur-containing polymer solid state electrolyte and its preparation method and application. The sulfur-containing polymer solid state electrolyte comprises a sulfur-containing polymer, a lithium salt and a porous support material; the molecular weight of the sulfur-containing polymer is 2000-50000Da, The mass fraction of the sulfur-containing polymer in the sulfur-containing polymer solid state electrolyte is 35%-85%. The sulfur-containing polymer solid-state electrolyte is applied to the preparation of solid-state lithium batteries. The sulfur-containing polymer solid-state electrolyte provided by the invention has high lithium ion conductivity and a wide electrochemical window; the solid-state lithium battery provided by the invention can realize fast charge and discharge, good rate performance, and excellent long-term cycle stability performance.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a sulfur-containing polymer solid state electrolyte and a preparation method and application thereof. Background technique [0002] Due to the advantages of high energy density, low cost, and long cycle life, lithium batteries have always been the focus of scientific researchers and entrepreneurs. It generally uses flammable and explosive ethylene carbonate (EC)-dimethyl carbonate (DMC) as the electrolyte solvent, which has certain potential safety hazards. Therefore, solid-state electrolytes without organic solvents can greatly improve the safety performance of lithium batteries, and have been widely concerned by researchers. Solid electrolytes can be divided into polymer solid electrolytes and inorganic solid electrolytes. Polymer solid-state electrolytes have become a research hotspot because of their light weight, high safety, and good processability. [0003] In polymer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0565H01M10/058H01M10/0525
CPCH01M10/0525H01M10/0565H01M10/058H01M2300/0088Y02E60/10Y02P70/50
Inventor 刘志宏宣策高淑豫尤庆亮郑云刘学清刘继延程鑫徐锐
Owner 柔电(武汉)科技有限公司
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