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Single-lithium-ion-conducting solid polymer electrolyte adopting carbon dioxide based polycarbonate as main chain and preparation method of single-lithium-ion-conducting solid polymer electrolyte

A technology based on polycarbonate and solid polymer, which is applied in the field of organic polymer functional materials and electrochemistry, can solve the problems of low ionic conductivity of single ion conductors, complicated synthesis process, etc., and achieves simple and easy synthesis and glass transition temperature. Low cost, easy availability of raw materials

Active Publication Date: 2017-02-15
SUN YAT SEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of low ion conductivity and complex synthesis process of existing single ion conductors, and provide a lithium single ion conductive solid polymer electrolyte with carbon dioxide-based polycarbonate as the main chain and its preparation method

Method used

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  • Single-lithium-ion-conducting solid polymer electrolyte adopting carbon dioxide based polycarbonate as main chain and preparation method of single-lithium-ion-conducting solid polymer electrolyte
  • Single-lithium-ion-conducting solid polymer electrolyte adopting carbon dioxide based polycarbonate as main chain and preparation method of single-lithium-ion-conducting solid polymer electrolyte

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Example 1: M - Li + Preparation of an electrolyte (electrolyte 1) that is COOLi and has a molar percentage of 41.0%

[0025] Put 1.00 g of zinc glutarate catalyst (ZnGA) in the autoclave, vacuum-dry it at 80 °C for 6 h, then cool the autoclave to below 35 °C, and quickly inhale 12.9 g (0.222 mol) PO and 91.3 g ( 0.780mol) AGE, filled with CO 2 to 3.0MPa. Stir at a speed of 110r / min, open the inlet valve when the temperature rises to 80°C, and adjust the pressure in the kettle to 5.0MPa. Cool to room temperature after reacting for 40 hours, release carbon dioxide, and take out the mixture product in the still to weigh. Dissolve the product in 200mL of dichloromethane, add 0.5% BHT, and add 5% dilute hydrochloric acid to remove the catalyst, slowly pour it into frozen ethanol for precipitation under mechanical stirring, repeat the above process to completely remove the monomer and catalyst, After that, it was dried under high vacuum at 80° C. for 20 hours to obtain P...

Embodiment 2

[0029] Example 2: M - Li + Preparation of COOLi and 24.0% electrolyte (electrolyte 2) by mole percent

[0030] The polymer electrolyte was prepared in the same manner as in Example 1, except that the feed was changed to PO 25.6g (0.441mol) and AGE 75.3g (0.660mol).

Embodiment 3

[0031] Example 3: M - Li + The preparation of the electrolyte (electrolyte 3) that is COOLi and the molar percentage is 13.4%

[0032] The polymer electrolyte was prepared in the same manner as in Example 1, except that the feed was changed to PO 42.0 g (0.723 mol) and AGE 54.8 g (0.480 mol).

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Abstract

The invention discloses a single-lithium-ion-conducting solid polymer electrolyte adopting carbon dioxide based polycarbonate as a main chain and a preparation method of the single-lithium-ion-conducting solid polymer electrolyte. The structure of the electrolyte is as shown in formula (I), M-Li<+> in the formula (I) is COOLi or SO3Li or the like; the number-average molecular weight of the polymer in the formula (I) is 2,000-15,0000 Da, R is (CH2)n, and n is an integer ranging from 0 to 20; the molar percentage of an ion functional group chain segment is included in the formula (I), that is, y / (x+y), is 10%-80%. The prepared polymer single-ion electrolyte has the advantages of being simple and easy to synthesize, environment-friendly, high in room temperature conductivity, high in lithium ion transference number, low in glass transition temperature, good in mechanical strength and film-forming property, wide in electrochemical window, good in thermostability and the like; the electrolyte adopts cheap and available raw materials and has potential application value in lithium batteries, carbon-based supercapacitors, solar cells and the like.

Description

technical field [0001] The invention belongs to the technical field of organic polymer functional materials and electrochemistry, and relates to a single-ion conducting polymer electrolyte and a preparation method thereof. More specifically, it relates to a single-ion conductive electrolyte with carbon dioxide-based polycarbonate as the main chain and a preparation method thereof. Background technique [0002] Lithium-ion battery is a high-capacity and high-voltage rechargeable battery and efficient energy storage device. Compared with traditional secondary batteries such as lead-acid batteries, nickel-metal hydride batteries and nickel-cadmium batteries, it has the advantages of high energy density, long cycle life and environmental friendliness. After decades of rapid development, it has been widely used in mobile phones, notebook computers, digital cameras, electric vehicles, hybrid electric vehicles and other fields. [0003] The existing lithium-ion battery system use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01G11/56
CPCH01M10/0565H01G11/56Y02E60/13Y02E60/10
Inventor 肖敏邓魁荣孟跃中王拴紧韩东梅任山黄旭霞
Owner SUN YAT SEN UNIV
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