Composition, zirconium-based metal crosslinked polymerization network, diaphragm and preparation method thereof, and electrochemical cell

A cross-linking polymerization, base metal technology, applied in non-aqueous electrolyte batteries, lithium batteries, battery pack parts and other directions, can solve the problem of no progress in suppressing parasitic reactions, and achieve the goal of inhibiting the growth of dendrites, inhibiting parasitic reactions, improving The effect of cycle performance

Active Publication Date: 2020-09-25
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although some achievements have been made in the inhibition of lithium dendrite growth in decades of research, little progress has been made in the inhibition of parasitic reactions.

Method used

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  • Composition, zirconium-based metal crosslinked polymerization network, diaphragm and preparation method thereof, and electrochemical cell
  • Composition, zirconium-based metal crosslinked polymerization network, diaphragm and preparation method thereof, and electrochemical cell
  • Composition, zirconium-based metal crosslinked polymerization network, diaphragm and preparation method thereof, and electrochemical cell

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preparation example Construction

[0049] The embodiment of the present invention also provides a method for preparing a zirconium-based metal cross-linked polymeric network, including:

[0050] S1, providing the zirconium-based metal organic cluster; and

[0051] S2, mixing the zirconium-based metal-organic cluster with the initiator in a solvent, and causing the zirconium-based metal-organic cluster to undergo an alkenyl addition polymerization reaction under the triggering conditions of the initiator to form a zirconium-based metal organic cluster Cross-linked polymeric network.

[0052] In one embodiment, step S1 includes the step of preparing the zirconium-based metal-organic cluster, specifically including:

[0053] Provide +4 valent zirconium ion source and organic ligand source;

[0054] The zirconium ion source and the organic ligand source are mixed in a solvent, and reacted at 25° C. to 200° C. to obtain the zirconium-based metal organic cluster.

[0055] The +4 valent zirconium ion source can be ...

Embodiment

[0085] Mix 20g (0.23mol) of methacrylic acid and 20g (0.06mol) of zirconium n-propoxide, then add 15mL of ethyl acetate, stir at 65°C under normal pressure for 24h, and recrystallize after the reaction to obtain the zirconium-based metal organic Cluster, chemical formula is Zr 6 o 4 (OH) 4 (C 4 h 5 o 2 ) 12 , where the organic ligand L is The size of zirconium-based metal-organic clusters can be calculated to be 1.6nm by single crystal X-ray diffraction.

[0086] The zirconium-based metal-organic cluster was dissolved in an equal mass of propylene glycol monomethyl ether acetate (PGMEA) to form a solution. TDPO is added into the solution, and the mass of TDPO is 20% of the mass of the zirconium-based metal-organic cluster to obtain a mixed solution. The mixed solution was exposed to 365nm ultraviolet radiation under an argon atmosphere for 60 minutes, dried to remove the solvent, and formed a zirconium-based metal cross-linked polymer network (Zr-MOCN), and its BET sp...

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Abstract

The invention provides a composition, a zirconium-based metal crosslinked polymerization network obtained by reaction of the composition, and an electrochemical cell diaphragm prepared from the zirconium-based metal crosslinked polymerization network. The composition comprises a zirconium-based metal organic cluster and an initiator, and the chemical formula of the zirconium-based metal organic cluster is Zr<6>O<x>(OH)<8-x>L<y>. The invention further provides a preparation method of the zirconium-based metal crosslinked polymerization network, a preparation method of the electrochemical cell diaphragm and an electrochemical cell.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a composition, a zirconium-based metal cross-linked polymer network, a diaphragm for an electrochemical battery, a preparation method for the zirconium-based metal cross-linked polymer network and the diaphragm, and an electrochemical cell. Background technique [0002] Lithium has the lowest reduction potential and the smallest atomic weight among all metals, and was once considered the most ideal battery negative electrode material. Since the 1950s, efforts have been made to use lithium metal as the negative electrode for rechargeable batteries. However, the problems of Li dendrite growth and parasitic reactions during charging of Li metal anodes were quickly recognized. After that, graphite negative electrodes were developed in the 1990s. Unlike the lithium deposition process of lithium metal negative electrodes, lithium ions are charged by inserting between gra...

Claims

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Application Information

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IPC IPC(8): C08G83/00H01M2/14H01M2/16H01M10/052
CPCC08G83/008H01M10/052Y02E60/10
Inventor 何向明徐宏盛丽
Owner TSINGHUA UNIV
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