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Comb-shaped polymer, comb-shaped polymer electrolyte material and preparation method of the comb-shaped polymer electrolyte material

A comb-like polymer and electrolyte material technology, applied in the field of polymers, to achieve good mechanical properties, enhance mobility, and increase capacity

Active Publication Date: 2012-03-14
ZHENGZHOU BAK BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These experiments illustrate the limitations of polyethylene oxide-based polymers to enhance electrical conductivity [O.Buriez, Y.B.Han, J.Hou, J.B.Kerr, J.Qiao, S.E.Sloop, M.M.Tian, ​​S.G.Wang, J. .PowerSources, 2000, 89(2), 149]

Method used

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  • Comb-shaped polymer, comb-shaped polymer electrolyte material and preparation method of the comb-shaped polymer electrolyte material
  • Comb-shaped polymer, comb-shaped polymer electrolyte material and preparation method of the comb-shaped polymer electrolyte material
  • Comb-shaped polymer, comb-shaped polymer electrolyte material and preparation method of the comb-shaped polymer electrolyte material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Mix 32.5g of tribromoneopentyl alcohol, 4.44g of sodium hydroxide, 40mL of methanol and 10mL of water in a round-bottomed flask, stir and react at 60°C under nitrogen protection, and react for 1 hour, filter to remove the generated NaBr, and spin The solvent was removed, and the product was distilled under reduced pressure (5 mm Hg) at 80° C. to obtain 3,3-bis(bromomethyl)oxetane (21.5 g, yield 88%) as a colorless oil.

[0060] Add 18g of 3,3-bis(bromomethyl)oxetane and 30mL of dichloromethane solvent into a dry three-necked flask, and mix well at 0°C. Quickly inject 15uL boron trifluoride diethyl ether initiator. The reaction proceeded vigorously, and poly[3,3-bis(bromomethyl)oxetane] was obtained as a white solid within a few minutes. The obtained polymer was washed successively with chloroform and aqueous sodium bicarbonate solution, and then vacuum-dried to obtain 17.4 g of the product, with a yield of 97%.

[0061] 13g poly[3,3-bis(bromomethyl)oxetane] homopolyme...

Embodiment 2

[0066] Add 30uL boron trifluoride diethyl ether and 2mL dichloromethane into a dry three-necked flask, and mix well at 0°C. Then 3.42 g of oxetane, 6 g of 3,3-bis(bromomethyl)butylene oxide prepared in Example 1, and 10 mL of dichloromethane were slowly added (addition rate: 0.5 mL / min). After reacting for 1 hour, the obtained random copolymer was neutralized with 0.02 g of sodium bicarbonate aqueous solution, the polymer was precipitated with petroleum ether, and the dissolution-precipitation was repeated twice, the solvent was rotary evaporated, and the product was vacuum-dried at 70 ° C for 24 hours to obtain 7.2 g The product yield was 76.4%. The molar ratio of oxetane to 3,3-bis(bromomethyl)oxetane in the random copolymer was 3.4:1.

[0067] With 4.41g poly[oxetane-3,3-bis(bromomethyl)oxetane] copolymer, 1g tetrabutylphosphine bromide, 7.92g methyl polyoxypropylene alcohol (4 repetitions unit), 10 mL of diethylene glycol dimethyl ether were mixed in a beaker and slowly a...

Embodiment 3

[0072] Add 30uL boron trifluoride diethyl ether and 2mL dichloromethane into a dry three-necked flask, and mix well at 0°C. Then 3.42 g of oxetane, 6 g of 3,3-bis(bromomethyl)oxetane prepared in Example 1, and 10 mL of dichloromethane were slowly added (addition rate: 0.5 mL / min). After reacting for 1 hour, the obtained random copolymer was neutralized with 0.02 g of sodium bicarbonate aqueous solution, the polymer was precipitated with petroleum ether, and the dissolution-precipitation was repeated twice, the solvent was rotary evaporated, and the product was vacuum-dried at 70 ° C for 24 hours to obtain 7.2 g The product yield was 76.4%. The molar ratio of oxetane to 3,3-bis(bromomethyl)oxetane in the random copolymer was 3.4:1.

[0073] 4.41g poly[oxetane-3,3-bis(bromomethyl)oxetane] copolymer, 1g tetrabutylphosphine bromide, 21.84g methyl polyoxypropylene alcohol (12 repeated unit), 20 mL of diethylene glycol dimethyl ether were mixed in a beaker and slowly added to a thr...

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PUM

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Abstract

The invention discloses a comb-shaped polymer, a comb-shaped polymer electrolyte material and a preparation method of the comb-shaped polymer electrolyte material. The comb-shaped polymer electrolyte material comprises a polymer matrix and a lithium salt. The polymer matrix is the comb-shaped polymer, and comprises a main chain repeating unit and a side chain repeating unit. The main chain repeating unit comprises a propylene oxide unit. The side chain repeating unit is a propylene oxide unit. In the invention, polypropylene oxide having excellent flexibility is introduced in the polymer matrix and a main chain is formed, and thus polymer chain segment motion is increased; polypropylene oxide chains having different length are introduced in side chains and the comb-shaped polymer is obtained, and thus solid electrolyte conductivity is improved; and through radiation crosslinking, electrolyte mechanical properties are improved.

Description

technical field [0001] The invention relates to a polymer, in particular to a comb-shaped polymer electrolyte material for high-performance solid lithium batteries and a preparation method thereof. Background technique [0002] Liquid electrolyte is currently the mainstream electrolyte used in lithium-ion secondary batteries, and its main advantage is high conductivity (room temperature conductivity is 10 -2 ~10 -3 S / cm); however, the liquid electrolyte is easy to volatilize, and its safety issues have always been criticized, and there are potential safety hazards of combustion or even explosion. Due to the large amount of liquid electrolyte contained in the gel polymer electrolyte, although the conductivity is high and the dimensional stability is good, but similar to the liquid electrolyte, the safety is still not good. With the rapid development of lithium-ion battery technology and the diversity of market demand, people put forward higher requirements, such as thinner,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/22C08G65/18C08G65/20C08G65/331C08G65/24C08L71/02C08L71/03C08J3/28C08J3/24H01M10/0565
CPCY02E60/10
Inventor 林建
Owner ZHENGZHOU BAK BATTERY CO LTD
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