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Organic-inorganic hybrid all-solid-state polymer electrolyte with high thermal resistance and mechanical strength and preparation method thereof

An all-solid polymer, mechanical strength technology, applied in hybrid capacitor electrolytes, capacitor electrolytes/absorbents, electrolytic capacitors, etc., can solve problems such as inability to achieve stable use, achieve easy control, good mechanical properties, and reduce crystallinity Effect

Inactive Publication Date: 2016-05-25
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the polymer electrolytes reported at this stage cannot meet the requirements of stable use at high temperatures. Therefore, the development of new all-solid polymer electrolytes with high heat resistance and good mechanical strength has increasingly attracted people's attention. Pay attention to

Method used

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  • Organic-inorganic hybrid all-solid-state polymer electrolyte with high thermal resistance and mechanical strength and preparation method thereof
  • Organic-inorganic hybrid all-solid-state polymer electrolyte with high thermal resistance and mechanical strength and preparation method thereof
  • Organic-inorganic hybrid all-solid-state polymer electrolyte with high thermal resistance and mechanical strength and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Preparation of polyaryletherketone-polyethylene glycol brominated copolymer PAEK-PEG600-90%-Br.

[0030] 1) Under a nitrogen atmosphere, weigh 15 g of polyethylene glycol with a number-average molecular mass of 600 and add it to a 100 mL three-necked flask, heat to 50 ° C under stirring conditions until the polyethylene glycol melts, and add 15 mL of Chlorothionyl, and then the system was heated to 80 ° C for 6 hours until the reaction was complete, and the reaction device was connected to a vacuum distillation device to remove the remaining thionyl chloride to obtain 15.50 g of chlorine-terminated polyethylene glycol as a pale yellow solid.

[0031] 2) Weigh 3.1420g of 4,4′-difluorobenzophenone, 5.8154g of 3,5,3′,5′-tetramethylbiphenyldiphenol, and chlorine-terminated polyethylene glycol (Mn=600) Add 9.95g, 3.974g of anhydrous potassium carbonate and 50.10mL of reaction solvent sulfolane to a 100mL three-necked flask in sequence, then add 25mL of water-carry...

Embodiment 2

[0036] Example 2: Preparation of polyaryletherketone-polyethylene glycol brominated copolymer PAEK-PEG2000-10%-Br.

[0037] 1) Under a nitrogen atmosphere, weigh 15 g of polyethylene glycol with a number-average molecular mass of 2000 and add it to a 100 mL three-necked flask, heat to 50 ° C under stirring conditions until the polyethylene glycol melts, and add 12 mL of Chlorothionyl, then the system was warmed up to 80 ° C for 6 hours, until the reaction was complete, the reaction device was connected to a vacuum distillation device to remove the remaining thionyl chloride to obtain 15.61 g of chlorine-terminated polyethylene glycol light yellow solid .

[0038] 2) Under a nitrogen atmosphere, weigh 4.7131g of 4,4'-difluorobenzophenone, 2.9762g of 2-methylhydroquinone, 4.8g of chlorine-terminated polyethylene glycol (Mn=2000), Add 3.974g of potassium carbonate water and 50.10mL of reaction solvent sulfolane to the three-necked flask in sequence, then add 25mL of water-carryi...

Embodiment 3

[0043] Example 3: Preparation of polyaryletherketone-polyethylene glycol copolymer all-solid polymer electrolyte 1.

[0044] 1) Dissolve the polyaryletherketone-polyethylene glycol brominated copolymer PAEK-PEG2000-10%-Br0.8g prepared in Example 2 in 8mL of the reaction solvent N,N-dimethylacetamide, at room temperature After stirring for 7 hours, a uniform and transparent mixed solution was obtained.

[0045] 2) Add lithium perchlorate accounting for 30% of the polymer mass into the mixed solution prepared in step (1), stir until it is completely dissolved into a homogeneous solution, and then pour it on a 8×8cm horizontal polytetrafluoroethylene plate to form a The film was vacuum-dried at 80° C. for 72 hours to remove the reaction solvent, and an all-solid polymer electrolyte 1 was obtained.

[0046] This example does not carry out benzyl hydroxylation, and does not add inorganic nanoparticles, and is used as a comparative example.

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Abstract

The invention belongs to the technical field of polymer electrolyte preparation and relates to organic-inorganic hybrid all-solid-state polymer electrolyte with high thermal resistance and mechanical strength and a preparation method thereof. This electrolyte comprises a polyaryletherketone-polyethylene glycol brominated copolymer matrix having a polyethylene glycol structured main chain, inorganic nanoparticles and a lithium salt. The polyetherketone main chain structure is introduced to polyethylene glycol chain segments, thus ensuring the transmission of lithium ions in the polymer electrolyte, and the polyaryletherketone main chain structure provides the polymer electrolyte with excellent thermal resistance. The introduction of the inorganic nanoparticles also partly improves the mechanical strength, thermal stability and chemical stability of the polymer electrolyte. The invention improves the defect that traditional polymer electrolyte fails at a high temperature and ensures that an electrochemical device such as a lithium ion battery, a solar cell and a supercapacitor, assembled with the all-solid-state polymer electrolyte, operates safely and efficiently in high-temperature extreme environments.

Description

technical field [0001] The invention belongs to the technical field of polymer electrolyte preparation, and in particular relates to an organic-inorganic hybrid all-solid polymer electrolyte with high heat resistance and mechanical strength and a preparation method thereof. Background technique [0002] The progress of society has promoted the emergence and development of new energy sources, and at the same time, it has also promoted the development of a series of electrochemical energy sources and energy storage devices such as lithium-ion batteries, solar cells, and supercapacitors. Electrolyte is an indispensable part of energy storage devices. It not only plays the role of ion transmission between positive and negative electrodes, but also plays an important role in the safety, cycle performance, and cost of energy storage devices. [0003] Most of the electrolytes used in the market at this stage are liquid electrolytes, but there are a series of problems in the applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/48H01M10/0565H01G9/20H01G9/025H01G11/56
CPCC08G65/48H01G9/025H01G9/20H01G9/2009H01G11/56H01M10/0565Y02E60/10Y02E60/13
Inventor 王贵宾那睿琦栾加双张梅张淑玲张兴瑞
Owner JILIN UNIV
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