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Alkoxy oligopolyethylene phosphate metal salt and its preparation method and application

An alkoxy oligopolyethylene phosphate and metal salt technology, which can be used in chemical instruments and methods, structural parts, electrochemical generators, etc. The effect of improving charge-discharge cycle life, uniform electronic conductivity, and improving creep resistance

Active Publication Date: 2022-02-15
衢州市求是科技联合会
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The purpose of the present invention is to solve the problems of safety anxiety, life expectancy, rate anxiety and mileage anxiety in the performance of existing lithium batteries, and to develop a method that is different from preparing lithium battery solid electrolytes with polyoxyethylene-based solid solutions and using lithium oxide It is a technical route for the preparation of solid electrolytes for lithium batteries based on garnet crystal ceramics, and a new route for fast ion solid electrolytes for lithium batteries based on EVA rubber polymer solid solution is used to provide a key multifunctional additive preparation method

Method used

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  • Alkoxy oligopolyethylene phosphate metal salt and its preparation method and application
  • Alkoxy oligopolyethylene phosphate metal salt and its preparation method and application
  • Alkoxy oligopolyethylene phosphate metal salt and its preparation method and application

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preparation example Construction

[0062] The second aspect of the present invention provides a method for preparing metal salt of alkoxy oligopolyethylene phosphate, comprising the following steps:

[0063] (1) Using phosphorus pentoxide, ethylene glycol, and intermediate fatty alcohols as raw materials, with the cooperation of reaction medium and feeding auxiliary agents, alkoxy oligopolyethylene phosphate is synthesized by masterbatch method or by conventional methods as Precursor;

[0064] (2) In cyclohexane, using the precursor obtained in step (1), lower aliphatic lithium alkoxide as raw material or the precursor obtained in step (1), lower aliphatic lithium alkoxide, nickel sulfate-63 as raw material, The alkoxy oligopolyethylene phosphate metal salt was synthesized.

[0065] Preferably, the middle fatty alcohol is n-butanol, n-hexanol or isooctyl alcohol, and the lower fatty lithium alcohol is lithium ethoxide and / or lithium methoxide.

[0066] In the synthetic reaction of alkoxy oligopolyethylene pho...

Embodiment 1

[0122] Embodiment 1, the preparation of 375 grams of small samples of isooctyloxy oligopolyethylene phosphate cyclohexane solution used as reaction medium masterbatch

[0123] (1) In a Φ-130mm porcelain mortar as a reaction vessel, add 200 grams of cyclohexane as a reaction medium, and use nitrogen as a protective atmosphere to prevent moisture absorption on the surface of the reaction medium;

[0124] (2) drop into 24.8 gram ethylene glycol liquids in the reaction medium in the Φ-130mm porcelain mortar, stir into turbid liquid;

[0125] (3) In the 150mL glass syringe of the second reaction raw material component, add 50 grams of cyclohexane as a reaction medium, add 0.2 grams of di-isooctyl phosphate as a lubricant, and then add 28.4 grams of phosphorus pentoxide powder Shake to ensure that the phosphorus pentoxide powder is completely wetted by cyclohexane to form a slurry.

[0126] (4) Keep the turbid liquid in the Φ-130mm porcelain mortar reaction vessel in the step (2) i...

Embodiment 2

[0134] Example 2, the preparation of a 375-gram sample of the precursor isooctyloxypolyethylene phosphate cyclohexane solution

[0135] (1) In the 120mL glass syringe of the first reaction raw material component, add 50 grams of reaction medium pure cyclohexane, then add 24.8 grams of first reaction raw material pure ethylene glycol, shake to ensure that it is an emulsion, Duplicate 6 glass syringes containing a mixture of ethylene glycol and cyclohexane;

[0136] (2) In the 120mL glass syringe of the second reaction raw material component, add 60 grams of pure cyclohexane as the reaction medium, and add 1 gram of lubricant, which is obtained from the acidic isooctyl oxide in step (10) The cyclohexane solution of ethylene oligopolyphosphate, then add 28.4 grams of phosphorus pentoxide powder as the second reaction raw material, shake to ensure that the phosphorus pentoxide powder is all wetted by the cyclohexane solution and become a slurry, copy 6 Glass syringes containing a...

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Abstract

The invention relates to the field of oligomer materials and the field of lithium batteries, and discloses a metal salt of alkoxypolyethylene phosphate and its preparation method and application. Its precursor is alkoxypolyethylene phosphate, which is An amphoteric oligomer copolymerized by polar groups and non-polar groups, the required synthetic raw materials are both polar and non-polar. In order to overcome the difficulty of dissolving synthetic raw materials of different polarities in the same reaction medium and the mass transfer resistance, the present invention utilizes the characteristics that the precursor can help dissolve polar raw materials and non-polar raw materials in a small amount at the same time in the reaction medium. The production of the precursor is carried out by differential feeding in the precursor solution and a cycle step reaction method. The compound solution of lithium salt of the precursor, EVA rubber and carbon black is used for the binder of the electrode active powder of lithium battery, and the compound solution of nickel-63 lithium salt of the precursor and EVA rubber is used for the rubber of lithium battery fast ionic solid electrolyte.

Description

technical field [0001] The invention relates to the field of oligomer materials and the field of lithium batteries, in particular to an alkoxy oligopolyethylene phosphate metal salt as a solid electrolyte component and an electrode active powder binder component, and a preparation method and application thereof. Background technique [0002] The current power lithium-ion batteries have safety anxiety, life expectancy, rate anxiety and mileage anxiety. [0003] In order to solve the safety anxiety, the first existing technology is to add aryl phosphate flame retardant additives to the lithium battery electrolyte. The disadvantage of this technical route is that it occupies the proportion of other functional components of the electrolyte. The second is to use lithium iron phosphate as the positive electrode material. The disadvantage of this technical route is that the working voltage of the lithium iron phosphate battery is much lower than that of the nickel-cobalt-manganese ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/11C09J123/08C09J11/04C09J11/06H01M4/62H01M10/0565H01M10/052
CPCC07F9/098C07F9/11H01M4/622H01M10/0565H01M10/052C09J123/0853C09J11/04C09J11/06C08K2201/001C08K3/04C08K5/521Y02E60/10
Inventor 周勤夫周丽华应盛荣方晓汾单建军徐国群
Owner 衢州市求是科技联合会
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