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Highly ordered lithium battery block polymer electrolyte membrane and preparation method thereof

A block polymer, highly ordered technology, used in composite electrolytes, electrolyte battery manufacturing, non-aqueous electrolyte batteries, etc., can solve the problems of uneven distribution of electrolyte membrane impedance, influence, low electrical conductivity, etc. rate, the effect that is conducive to conduction

Inactive Publication Date: 2021-02-26
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It can be seen that the polymer-based electrolytes of lithium batteries in the prior art have the problem of relatively low conductivity, which has great limitations on the actual use of electrolyte membranes. Most of the traditional improvement methods are to use high-conductivity organic phases for cross-linking. , but its reaction process and structure are difficult to effectively control, resulting in uneven impedance distribution in various regions of the electrolyte membrane, which has an adverse effect on the overall performance of the battery

Method used

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  • Highly ordered lithium battery block polymer electrolyte membrane and preparation method thereof
  • Highly ordered lithium battery block polymer electrolyte membrane and preparation method thereof
  • Highly ordered lithium battery block polymer electrolyte membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] a. Mix the ferrous salt and the ferric salt according to the molar ratio of 1:1.8 to obtain the mixed iron salt, then add it into deionized water, and add an alkaline solution containing a surfactant to react, after separation, washing, Follow-up treatment such as drying obtains nano-ferric oxide particles; wherein, 32 parts by weight of mixed iron salt, 48 parts by weight of deionized water, 2 parts by weight of surfactant, and 18 parts by weight of alkaline solution; Ferrous iron, ferric salt is ferric chloride, and tensio-active agent is stearic acid, and alkali solution is the sodium hydroxide solution that mass concentration is 35%;

[0034] b. Mix styrene and ethylene glycol uniformly, configure it as a solution, add the nano-iron ferric oxide particles obtained in step (a) into the solution, perform ball milling to disperse evenly, and obtain a mixed slurry; wherein, 35 parts by weight of styrene , 53 parts by weight of ethylene glycol, 12 parts by weight of nano...

Embodiment 2

[0037]a. Mix the ferrous salt and the ferric salt according to the molar ratio of 1:1.75 to obtain the mixed iron salt, then add it into deionized water, and add an alkaline solution containing a surfactant to react, after separation, washing, Follow-up treatment such as drying obtains nano ferric oxide particles; wherein, 32 parts by weight of mixed iron salt, 50 parts by weight of deionized water, 1 part by weight of surfactant, and 17 parts by weight of alkaline solution; Iron, ferric salt is ferric nitrate, surfactant is sodium dodecylbenzene sulfonate, and alkali solution is the potassium hydroxide solution that mass concentration is 32%;

[0038] b. Mix styrene and ethylene glycol evenly, configure it as a solution, add the nano-iron ferric oxide particles obtained in step (a) into the solution, perform ball milling to disperse evenly, and obtain a mixed slurry; wherein, 33 parts by weight of styrene , 55 parts by weight of ethylene glycol, 12 parts by weight of nano fer...

Embodiment 3

[0041] a. Mix the ferrous salt and the ferric salt according to the molar ratio of 1:1.95 to obtain the mixed iron salt, then add deionized water, and add an alkaline solution containing a surfactant to react, separate, wash, Follow-up treatment such as drying obtains nano ferric oxide particles; wherein, 34 parts by weight of mixed iron salt, 46 parts by weight of deionized water, 2 parts by weight of surfactant, 18 parts by weight of alkali solution; Iron, ferric salt is ferric sulfate, surfactant is sodium dioctyl succinate sulfonate, and alkali solution is the sodium hydroxide solution that mass concentration is 38%;

[0042] b. Mix styrene and ethylene glycol uniformly, configure it as a solution, add the nano-iron ferric oxide particles obtained in step (a) into the solution, and perform ball milling to disperse evenly to obtain a mixed slurry; wherein, 37 parts by weight of styrene , 49 parts by weight of ethylene glycol, 14 parts by weight of nano ferric oxide particle...

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Abstract

The invention discloses a highly ordered lithium battery block polymer electrolyte membrane and a preparation method thereof. The block polymer electrolyte membrane is prepared by the following steps:a, adding divalent iron salt, trivalent iron salt and an alkaline solution containing a surfactant into deionized water, and reacting to obtain nano ferroferric oxide particles; b, adding nano ferroferric oxide particles into a mixed solution of styrene and ethylene glycol, and carrying out ball-milling dispersion to obtain a slurry; and c, adding a polystyrene-ethylene oxide block polymer and aninitiator into the slurry, coating the surface of a glass substrate with the slurry after an ultrasonic stirring reaction, and drying the slurry under the action of a magnetic field to obtain the highly ordered lithium battery block polymer electrolyte membrane. The method has the following beneficial effects that the magnetic particles are loaded through an organic phase, the whole electrolyte membrane has a highly ordered structure through magnetic field adjustment, conduction of lithium ions in the electrolyte membrane is facilitated, and the overall conductivity of the electrolyte membrane is improved.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to the preparation of electrolyte membranes, in particular to a highly ordered lithium battery block polymer electrolyte membrane and a preparation method. Background technique [0002] Lithium-ion batteries have high energy density, strong stability, no memory effect, and long cycle life. As a commercialized high-efficiency energy storage device, they have been widely used in mobile phones, notebook computers and other electronic products, and will become the future of electric vehicles. One of the preferred power sources for power batteries. Compared with liquid batteries, the polymer electrolyte used in the battery will not cause dangers such as leakage, combustion and explosion, and the composite aluminum-plastic film shell can be used, which has the advantages of arbitrary area and arbitrary shape, and can effectively prevent metal lithium from being branched. The formation of...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/0565
CPCH01M10/0565H01M10/058H01M2300/0088Y02E60/10Y02P70/50
Inventor 廖健淞陈庆司文彬李钧
Owner CHENDU NEW KELI CHEM SCI CO LTD
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