All-solid-state composite polymer electrolyte and preparation method thereof

A composite polymer and electrolyte technology, which is applied in the direction of solid electrolyte, non-aqueous electrolyte, non-aqueous electrolyte battery, etc., can solve the problems of battery temperature rise, combustion or explosion, and difficulty in molding, and achieve simple preparation process and high conductivity , the effect of high production efficiency

Active Publication Date: 2018-07-20
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the battery is heated, overcharged, overdischarged, short-circuited, etc., the temperature rises, and a large amount of gas is generated, which brings safety hazards such as combustion or explosion.
Secondly, due to the constraints of the electrolyte, the current liquid battery cells are difficult to prepare into the required shape, and the molding is difficult

Method used

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  • All-solid-state composite polymer electrolyte and preparation method thereof
  • All-solid-state composite polymer electrolyte and preparation method thereof
  • All-solid-state composite polymer electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] An all-solid composite polymeric solid electrolyte, comprising:

[0025] PEO, 62.41wt%;

[0026] Lithium salt LiN(SO 2 CF 3 ) 2 , 22.59wt%;

[0027] Li 7 [V 15 o 36 (CO 3 )], 15.00 wt%.

[0028] The steps of the preparation method of the above-mentioned solid composite polymer electrolyte membrane are as follows:

[0029] (1) Weigh 0.6 g of PEO powder, add it into 25 mL of acetonitrile solution, and stir for 24 hours to obtain a uniform PEO-acetonitrile solution.

[0030] (2) Lithium salt LiN(sO 2 CF 3 ) 2 0.2172g, Li 7 [V 15 o 36 (CO 3 )] 0.1442g was added in 15mL acetonitrile solution, stirred for 24h to obtain a uniform LiN(SO 2 CF 3 ) 2 -Li 7 [V 15 o 36 (CO 3 )]-acetonitrile solution.

[0031] (3) the PEO-acetonitrile solution obtained in step (1) and the LiN(SO4) obtained in step (2) 2 CF 3 ) 2 -Li 7 [V 15 o 36 (CO 3 )]-acetonitrile solution was mixed and stirred for 12h. In a glove box filled with argon, pour the obtained mixed solu...

Embodiment 2

[0034] An all-solid composite polymeric solid electrolyte, comprising:

[0035] PEO, 67.88wt%;

[0036] Lithium salt LiN(SO 2 CF 3 ) 2 , 22.12wt%;

[0037] Li 7 [V 15 o 36 (CO 3 )], 5.00wt%;

[0038] Cu 2 O, 5.00 wt%.

[0039] The steps of the preparation method of the above-mentioned solid composite polymer electrolyte membrane are as follows:

[0040] (1) Weigh 0.6 g of PEO powder, add it into 25 mL of acetonitrile solution, and stir for 24 hours to obtain a uniform PEO-acetonitrile solution.

[0041] (2) Lithium salt LiN(SO 2 CF 3 ) 2 0.1955g, Li 7 [V 15 o 36 (CO 3 )] 0.04420g and Cu 2 O0.04420g was added in 15mL acetonitrile solution, stirred for 24h to obtain a uniform LiN(SO 2 CF 3 ) 2 -Li 7 [V 15 o 36 (CO 3 )]-Cu 2 O-acetonitrile solution.

[0042] (3) the PEO-acetonitrile solution obtained in step (1) and the LiN(SO4) obtained in step (2) 2 CF 3 ) 2 -Li 7 [V 15 o 36 (CO 3 )]-Cu 2 The O-acetonitrile solution was mixed and stirred for ...

Embodiment 3

[0045] An all-solid composite polymeric solid electrolyte, comprising:

[0046] PEO, 66.08wt%;

[0047] Lithium salt LiN(SO 2 CF 3 ) 2 , 23.92wt%;

[0048] Li 7 [V 15 o 36 (CO 3 )], 10.00wt%;

[0049] The steps of the preparation method of the above-mentioned solid composite polymer electrolyte membrane are as follows:

[0050] (1) Weigh 0.6 g of PEO powder, add it into 25 mL of acetonitrile solution, and stir for 24 hours to obtain a uniform PEO-acetonitrile solution.

[0051] (2) will Li 2 CO 3 Add 0.0813g into 10mL acetonitrile solution, stir for 2h to form Li 2 CO 3 - acetonitrile suspension.

[0052] (3) the PEO-acetonitrile solution obtained in step (1) and the Li obtained in step (2) 2 CO 3 -The acetonitrile suspension was mixed and stirred for 5h to obtain PEO-Li 2 CO 3 - acetonitrile solution.

[0053] (4) put V 2 o 5 0.1748g slowly adds the PEO-Li of step (3) gained several times 2 CO 3 -Acetonitrile solution, stirred for 5min.

[0054] (5) He...

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PUM

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Abstract

The invention discloses an all-solid-state composite polymer electrolyte and a preparation method thereof. The all-solid-state composite polymer electrolyte comprises the following components based onweight percentages: 1-80% of polyoxometallate used as a filler, 1-50% of lithium salt or sodium salt, 1-90% of high-molecular polymer, and 0-40% of additive; and the high-molecular polymer is selected from at least one kind of polyoxyethylene, polyacrylonitrile, polymethyl methacrylate, polytetrafluoroethylene, a (polyvinylidene fluoride-hexafluoropropylene) copolymer and polyvinyl chloride. Theall-solid-state composite polymer electrolyte has simple preparation process and high production efficiency. Therefore, the prepared all-solid-state composite polymer electrolyte is high in electricalconductivity and can be made into various kinds of shapes; and the content of polyoxometallate has high influence on electrical conductivity.

Description

technical field [0001] The invention belongs to the technical field of energy material electrolytes, and in particular relates to an all-solid composite polymer electrolyte and a preparation method thereof. Background technique [0002] Although liquid organic electrolytes have been practically used in commercial lithium and sodium batteries, there are still many problems. First of all, the electrolyte is an organic flammable substance, which is volatile and leaks easily. When the battery is heated, overcharged, overdischarged, short-circuited, etc., the temperature rises, and a large amount of gas is generated, which brings safety hazards such as combustion or explosion. Secondly, due to the constraints of the electrolyte, it is difficult to prepare the current liquid battery into the required shape, and it is difficult to shape it. Driven by the demands of the social market and the potential demands of energy storage systems, chemical energy storage systems based on new ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/052
CPCH01M10/052H01M10/0565H01M2300/0082Y02E60/10
Inventor 郑明森董全峰范镜敏袁相霏
Owner XIAMEN UNIV
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