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All-solid polymer electrolyte, and preparation method and application of all-solid polymer electrolyte

A technology of all-solid polymers and electrolytes, applied in the field of its preparation, all-solid polymer electrolytes, can solve the problems of not being able to use lithium-ion batteries and low room-temperature conductivity of electrolytes, and achieve good mechanical strength, low cost, and high ion conductivity rate effect

Inactive Publication Date: 2015-04-22
HUAZHONG UNIV OF SCI & TECH RES INST SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This solves the technical problem that the all-solid-state PEO-based polymer electrolyte has low room temperature conductivity and cannot be applied to lithium-ion batteries

Method used

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  • All-solid polymer electrolyte, and preparation method and application of all-solid polymer electrolyte
  • All-solid polymer electrolyte, and preparation method and application of all-solid polymer electrolyte

Examples

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Embodiment 1

[0028] This example is used to prepare an all-solid polymer electrolyte with a thickness of 100 μm, and its components include: polyethylene oxide with a molecular weight of 600,000, lithium trifluoromethanesulfonimide, barium titanate with a particle size of 10 nm, ion Liquid 1-butyl-1-methylpyrrolidine bistrifluoromethylsulfonimide. Wherein, the mass ratio of the lithium salt to the polyethylene oxide is 0.36, and the sum of the mass of the inorganic nanoparticles and the ionic liquid is 10% of the mass of the all-solid polymer electrolyte. The ionic liquid is liquid, and its trace exists in the all-solid polymer electrolyte, and the ionic liquid is not volatile.

[0029] Its preparation method is as follows:

[0030] S1: First mix lithium trifluoromethanesulfonylimide with organic solvent acetonitrile, then add barium titanate with a particle size of 10nm and ionic liquid 1-butyl-1-methylpyrrolidine bistrifluoromethylsulfonyl amine, then magnetically stirred for 60 min, a...

Embodiment 2

[0037] This example is used to prepare an all-solid polymer electrolyte with a thickness of 300 μm, and its components include: polyethylene oxide with a molecular weight of 800,000, lithium tetrafluoroborate, zirconia with a particle size of 100 nm, and ionic liquid 1-butyl -1-Methylpyrrolidine bistrifluoromethylsulfonimide. Wherein, the mass ratio of the lithium salt to the polyethylene oxide is 0.5, and the sum of the mass of the inorganic nanoparticles and the ionic liquid is 30% of the mass of the all-solid polymer electrolyte. The ionic liquid is liquid, and its trace exists in the all-solid polymer electrolyte.

[0038] Its preparation method is as follows:

[0039] S1: First mix lithium trifluoromethanesulfonylimide with organic solvent acetone, then add zirconia with a particle size of 100nm and ionic liquid 1-butyl-1-methylpyrrolidine bistrifluoromethylsulfonylimide , and then magnetically stirred for 30 min, and finally added polyethylene oxide powder with a molecul...

Embodiment 3

[0045] This example is used to prepare an all-solid polymer electrolyte with a thickness of 120 μm, and its components include: polyethylene oxide with a molecular weight of 1 million, lithium perchlorate and lithium hexafluorophosphate, silicon oxide with a particle size of 50 nm, and ionic liquid 1- Butyl-1-methylpyrrolidine bistrifluoromethylsulfonimide. Wherein, the mass ratio of the lithium salt to the polyethylene oxide is 0.1, and the sum of the mass of the inorganic nanoparticles and the ionic liquid is 15% of the mass of the all-solid polymer electrolyte. The ionic liquid is liquid, and its trace exists in the all-solid polymer electrolyte.

[0046] Its preparation method is as follows:

[0047] S1: Lithium perchlorate, lithium hexafluorophosphate, and organic solvent tetrahydrofuran were mixed first, then silicon oxide with a particle size of 50 nm and ionic liquid 1-butyl-1-methylpyrrolidine bistrifluoromethylsulfonimide were added, and then Stir magnetically for ...

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Abstract

The invention discloses an all-solid polymer electrolyte, and a preparation method and an application of the all-solid polymer electrolyte, and belongs to the field of lithium ion batteries. The all-solid polymer electrolyte comprises polyethylene oxide, lithium salt, inorganic nano particles and ion liquid, wherein a mass ratio of the lithium salt to polyethylene oxide is 0.1-0.5; the mass sum of the inorganic nano particles and the ion liquid is 10-30% of the mass of the all-solid polymer electrolyte; the lithium salt comprises one or several of bistrifluoromethane sulfonimide lithium salt, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluorophosphate, lithium hexafluoroarsenate, lithium trifluoromethanesulfonate and lithium bis borate; and the inorganic nano particles comprise one or several of nano aluminum oxide, nano silicon oxide, nano zirconium oxide and nano barium titanate. The all-solid polymer electrolyte has better mechanical strength and higher ion conductivity. The method is simple in technology and low in cost; and raw materials are easy to obtain.

Description

technical field [0001] The invention belongs to the field of preparation of lithium-ion battery electrolyte materials, and more specifically relates to an all-solid polymer electrolyte, its preparation method and application. Background technique [0002] At present, lithium-ion batteries have had a huge impact on people's daily life and the national economy. They are used in electronic products such as mobile phones and computers, automotive power plants, and renewable energy power stations. The performance of batteries depends largely on the development of materials. In lithium-ion batteries, key material components include positive electrodes, negative electrodes, and electrolytes. Electrolyte materials are important factors that affect the safety and stability of batteries. [0003] At present, the widely used liquid electrolyte is easy to corrode the positive and negative electrodes, resulting in irreversible loss of battery capacity. At the same time, the heat generat...

Claims

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Application Information

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IPC IPC(8): H01M10/0565H01M10/058
CPCH01M10/0525H01M10/0565H01M10/058H01M2300/0082Y02E60/10Y02P70/50
Inventor 朱文赵旭东崇保和
Owner HUAZHONG UNIV OF SCI & TECH RES INST SHENZHEN
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