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Multi-arm star-shaped block polymer based electrolyte and preparation method thereof

A technology of block polymers and block copolymers, applied in hybrid capacitor electrolytes, circuits, electrical components, etc., can solve the problems of low mechanical strength and achieve the effect of simple preparation methods

Inactive Publication Date: 2014-03-26
GRADUATE SCHOOL OF THE CHINESE ACAD OF SCI GSCAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the currently studied polymer electrolytes based on star-shaped polymers, although exhibiting higher conductivity than linear analogues, have lower mechanical strength, so the development of both high room temperature conductivity and good mechanical strength The new polymer electrolyte is of great significance

Method used

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  • Multi-arm star-shaped block polymer based electrolyte and preparation method thereof
  • Multi-arm star-shaped block polymer based electrolyte and preparation method thereof
  • Multi-arm star-shaped block polymer based electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this example, the polymerization reaction used is atom transfer radical-self-condensation vinyl polymerization (ATR-SCVP). Add 0.209g of cuprous chloride and 0.659g of 2,2'-bipyridyl into a 100mL dry polymerization bottle equipped with a magnet, and vacuumize the system with nitrogen, repeat three times, and then add 8.0mL of chlorobenzene and 2.4mL of Styrene and 3.0mL of p-chloromethylstyrene were stirred evenly, and reacted in an oil bath at 120°C under nitrogen protection for 4 hours, and then the reaction device was ventilated with air to terminate the reaction. Add tetrahydrofuran to the system to dilute, over-neutral Al 2 o 3 column to remove the catalyst, precipitate in methanol after rotary evaporation, filter with suction, and dry in a vacuum oven at 60°C for 12 hours. According to elemental analysis: C79.20%, H6.63%, Cl14.17%. The number average molecular weight measured by GPC was 6615, and the molecular weight distribution was 3.0. Each hyperbranched...

Embodiment 2

[0037]In this example, the polymerization reaction used is atom transfer radical-self-condensation vinyl polymerization (ATR-SCVP). Add 0.300g of cuprous bromide and 0.660g of 2,2'-bipyridyl into a 100mL dry polymerization bottle equipped with a magnet, and vacuumize the system with nitrogen, repeat three times, then add 8.0mL of chlorobenzene and 2.5mL of Methyl methacrylate and 3.5mL 2-(2-bromopropionyloxy)ethyl acrylate were stirred evenly, and reacted in an oil bath at 100°C under nitrogen protection for 4 hours, and then the reaction device was ventilated with air to terminate the reaction. Add tetrahydrofuran to the system to dilute, over-neutral Al 2 o 3 column to remove the catalyst, precipitate in methanol after rotary evaporation, filter with suction, and dry in a vacuum oven at 60°C for 12 hours. According to elemental analysis: C44.20%, H6.00%, O27.18, Br22.62%. The number average molecular weight measured by GPC was 7235, and the molecular weight distribution w...

Embodiment 3

[0039] Add 0.5g of the hyperbranched polymer prepared in Example 1, 0.1g of cuprous chloride, 40mL of chlorobenzene, and 46mL of styrene into a 250mL dry two-necked bottle equipped with a magnet, and cycle 3 times through freezing-vacuumizing-thawing Afterwards, 0.21 mL of pentamethyldiethylenetriamine was added with a syringe. After stirring evenly, place it in an oil bath at 120°C. After reacting for 150 minutes, pass air to terminate the reaction, and add THF to dilute. Over neutral Al 2 o 3 column to remove the catalyst, precipitate in methanol after rotary evaporation, filter with suction, and dry in a vacuum oven at 60°C for 12 hours. The number average molecular weight measured by GPC is 30055, and the number m of styrene structural units in the arms is 54.

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Abstract

The invention discloses full-solid-state multi-arm star-shaped block polymer based electrolyte. The preparation of the multi-arm star-shaped block polymer based electrolyte has the technical characteristics that a multi-arm star-shaped block polymer is synthesized by a core-first and arm-second method; a core of the multi-arm star-shaped block polymer is a hyperbranched polymer; each arm of the multi-arm star-shaped block polymer is composed of a rigid chain segment and a polymethoxyl polyethylene glycol acrylate chain segment; the rigid chain segment provides the mechanical strength and a polyethylene oxide (PEO) side chain can be used for dissolving salt and can be used as an ionic conduction base body. The polymer electrolyte does not contain any combustible and volatile solvent and a film can be formed by a solution pouring method; the room-temperature conductivity is close to 10<-4>s / cm. The polymer electrolyte has potential applications on electrochemical devices including lithium ion secondary batteries, ultra-capacitors, electronic sensors, electrochromism devices and the like.

Description

technical field [0001] The invention belongs to the field of polymer electrolyte materials, in particular to a multi-arm star block polymer electrolyte and a preparation method thereof. Background technique [0002] Compared with traditional nickel-cadmium batteries and nickel-metal hydride batteries, lithium-ion secondary batteries have the advantages of high working voltage, high energy density, long cycle life, low self-discharge rate and wide operating temperature range, and are widely used in mobile phones and notebook computers. , digital cameras and other portable electronic devices. However, traditional lithium secondary batteries usually use organic liquid electrolytes, which have problems of liquid leakage and explosion during use and storage, which seriously affect the battery life and safety. Compared with traditional organic liquid electrolyte materials, all-solid polymer electrolyte materials have the advantages of light weight, higher energy density, flexibil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565C08F293/00
CPCC08F293/005C08F2438/01H01G11/56H01M10/0565Y02E60/10Y02E60/13
Inventor 张辽云任士通李化毅常贺飞郑涛胡友良
Owner GRADUATE SCHOOL OF THE CHINESE ACAD OF SCI GSCAS
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