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Flame-retardant potassium ion battery electrolyte and preparation method thereof

A potassium ion and flame retardant technology, which is applied in the field of flame retardant potassium ion battery electrolyte and its preparation, can solve the problems of flammability, low boiling point and easy volatility of batteries, and achieves improved safety, wide application in the market, good The effect of flame retardant properties

Inactive Publication Date: 2017-07-07
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] As the carrier of ions, most of the current potassium ion batteries use carbonates, ethers, carboxylates and / or sulfur-containing organic solvents as carriers, and carbonates and / or ethers organic solvents have low boiling points and are easy to volatilize, resulting in Defects such as flammable and explosive batteries

Method used

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  • Flame-retardant potassium ion battery electrolyte and preparation method thereof
  • Flame-retardant potassium ion battery electrolyte and preparation method thereof
  • Flame-retardant potassium ion battery electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Preparation of siloxyfluorocyclotriphosphazene:

[0047] Dissolve 49.8g of hexafluorocyclotriphosphazene crystals in 200ml of tetrahydrofuran to form a hexafluorocyclotriphosphazene solution, add 12.9g of potassium trimethylsiliconate to the solution, stir until uniform, and react at 10°C for 20h , After filtration and vacuum distillation, the phosphazene derivative siloxyfluorocyclotriphosphazene was obtained.

Embodiment 2

[0049] The preparation process of methoxy pentafluorocyclotriphosphazene:

[0050] Methoxypentachlorocyclotriphosphazene was added to 200g of acetonitrile with constant stirring, and 110g of NaF was added. After a fluorination reaction at 60°C for 4 hours, methoxypentafluorocyclotriphosphazene was obtained by distillation.

Embodiment 3

[0052] The preparation process of triacetylbutanol-triethoxycyclotriphosphazene:

[0053] Put 49.8g of hexachlorocyclotriphosphazene crystals and hexane in a 500ml three-neck flask equipped with a stirrer, thermometer, and back distillation condenser, stir until it dissolves evenly, and react with 180g of sodium acetobutoxide at a temperature of 60°C 4 hours, then reacted with 40g sodium ethylate in 200 ethane for 4 hours, distilled, and refined to obtain a phosphazene derivative: triacetylbutanol-triethoxycyclotriphosphazene.

[0054] The present invention lists the compositions of 32 kinds of flame-retardant potassium-ion battery electrolytes and the test data of the self-extinguishing time of each flame-retardant potassium-ion battery electrolyte in tabular form, as shown in Table 1 below. The preparation method of the flame-retardant potassium ion battery electrolyte is as follows: the flame retardant uses 4A potassium molecular sieve to remove water for 40-55 hours, disso...

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Abstract

The invention discloses a flame-retardant potassium ion battery electrolyte and a preparation method thereof. The flame-retardant potassium ion battery electrolyte comprises an organic solvent, sylvite and a flame retardant. The organic solvent is a carbonic ester organic solvent and / or an ether organic solvent. The flame retardant accounts for 0.1-50% of total mass of the flame-retardant potassium ion battery electrolyte. The general structural formula of the flame retardant is as shown in the specification, wherein R1-R6 all can be alkyl groups, alkyloxy group, halogenated alkyl group, halogenated alkyloxy group, halogenated alkylene group, phenyl group, biphenyl group, halogenated phenyl group, halogenated biphenyl group, alkyl silicon, alkyloxy silicon, alkyl phosphate, alkyloxy boron or amide group. According to the flame-retardant potassium ion battery electrolyte, safety of a potassium ion battery can be raised, and cycling stability of the battery and battery capacity retention ratio also can be enhanced.

Description

technical field [0001] The invention relates to the technical field of potassium ion batteries, in particular to a flame-retardant potassium ion battery electrolyte and a preparation method thereof. Background technique [0002] Energy in modern society is dominated by traditional fossil fuels, such as coal, oil and natural gas. The depletion of traditional fossil fuels is inevitable, and most of the fossil energy will be exhausted in this century. On the other hand, the use of fossil energy will cause the emission of greenhouse gases, and at the same time produce some polluting smoke, which threatens the global ecology. Therefore, solving the energy problem will be a common task for all mankind. There are many new energy sources available for development, such as wind energy, nuclear energy, solar energy, biomass energy, tidal energy, etc. For the development of these new energy sources, a sound theoretical system needs to be established, among which energy storage is par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0569H01M10/0567H01M10/054H01M6/16
CPCH01M6/16H01M10/054H01M10/0567H01M10/0569Y02E60/10
Inventor 冯金奎安永灵
Owner SHANDONG UNIV
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