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Solid composite electrolyte membrane, manufacturing method thereof and polymer secondary battery

A composite electrolyte membrane, solid polymer technology, used in secondary batteries, secondary battery repair/maintenance, electrolytes, etc., can solve the problems of incompatibility, complex process, low productivity, etc.

Pending Publication Date: 2020-10-30
RESONAC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the above several methods, the first method reduces the interfacial impedance as a whole by adding ionic liquids, but such additives may not be compatible with the main body of the solid polymer electrolyte; Although the introduction of flexible groups can improve the interface to a certain extent, it cannot guarantee the bulk conductivity of the solid polymer electrolyte; the third method is complicated to implement and has low productivity

Method used

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  • Solid composite electrolyte membrane, manufacturing method thereof and polymer secondary battery
  • Solid composite electrolyte membrane, manufacturing method thereof and polymer secondary battery
  • Solid composite electrolyte membrane, manufacturing method thereof and polymer secondary battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0152] The preparation method of the positive electrode 11 may include the following steps:

[0153] Mixing process: dissolving or dispersing the positive electrode active material, conductive agent, and binder in the solvent according to a predetermined ratio, stirring or grinding them to make them evenly mixed, and preparing a slurry.

[0154] Coating process: uniformly coat the above-mentioned slurry on the current collector, and control the thickness of the slurry.

[0155] Drying process: drying the above-mentioned coated current collector in the atmosphere at 50-100°C for 2h, then transferring to a vacuum state and drying at 100-150°C for 8-24h to obtain the positive electrode.

[0156] The method for manufacturing the positive electrode has been described above, but the above-mentioned manufacturing method is also applicable to the preparation of the negative electrode material.

[0157]

[0158] In the polymer secondary battery 100 of the present invention, the nega...

Embodiment

[0168] The present invention will be further described below through examples, but the present invention is not limited by these examples and the like.

[0169] The measurement methods used in the present invention are as follows.

[0170] [Structure and purity]

[0171] For the synthesized polymers and plastic crystals, their structure and purity were confirmed by H NMR spectrum ( 1 H-NMR) were characterized. The instrument used was AVANCE III HD500 produced by Bruker, Germany, and the deuterated reagent used was deuterated dimethyl sulfoxide, deuterated dichloromethane, deuterated acetone or deuterated water.

[0172] [polymer molecular weight]

[0173] The molecular weight of the synthesized polymer was measured by gel permeation chromatography (GPC). The measurement conditions are: mobile phase: N,N-dimethylformamide, tetrahydrofuran, cyclohexane, etc., test temperature: 10-60°C, standard sample: polymethyl methacrylate, polyethylene glycol, polystyrene Wait. The ins...

Synthetic example 1

[0189] Synthesis of polyacrylonitrile

[0190]Under an argon atmosphere, 40 mL of toluene was added to a dry 150 mL three-necked flask, stirred and heated to 80° C., and kept for 15 min. 5.53 g (0.1 mol) of acrylonitrile and 0.03 g of azobisisobutyronitrile as a polymerization initiator were added dropwise through a constant pressure dropping funnel, and reacted for 7 hours. Add hydrochloric acid / methanol solution (volume ratio V of hydrochloric acid and methanol 盐酸 :V 甲醇 =1:10) 10 mL to terminate the reaction. After the obtained solid was filtered, it was washed twice with 20ml of acetone, twice with 20ml of deionized water, twice with 20ml of acetone, and then dried in a vacuum oven at 80°C for 24 hours to obtain a pale yellow acetone insoluble polymer. Acrylonitrile powder.

[0191] The structure of the resulting product 1 H-NMR was determined, the resulting 1 H-NMR picture as Figure 4 shown. The deuterated reagent used was deuterated dimethyl sulfoxide.

[0192]...

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Abstract

The invention provides a solid composite electrolyte membrane, which is composed of a solid polymer electrolyte layer (1) serving as a main body and gel polymer electrolyte layers (2, 3) arranged on the surfaces of the two sides of the solid polymer electrolyte layer (1) respectively, wherein the solid polymer electrolyte layer (1) and the gel polymer electrolyte layers (2, 3) are prepared from apolymer electrolyte composition containing a polymer, a plastic crystal and an electrolyte salt, and the concentration of the electrolyte salt in the solid polymer electrolyte layer (1) is lower thanthe concentration of the electrolyte salt in the gel polymer electrolyte layers (2, 3). According to the solid-state composite electrolyte membrane, the conductivity of a polymer-electrolyte salt system can be improved by several orders of magnitudes, a battery containing the solid-state composite electrolyte membrane can normally operate at room temperature, the contact between a polymer electrolyte and an electrode can be effectively enhanced, and the interface impedance is reduced.

Description

technical field [0001] The invention relates to a solid polymer electrolyte, in particular to a solid composite electrolyte membrane, a manufacturing method thereof, and a polymer secondary battery containing the solid composite electrolyte membrane. Background technique [0002] Compared with other secondary batteries, lithium-ion secondary batteries have outstanding advantages such as high energy density, long cycle life, no memory effect, and low environmental pollution. They are now used in computers, electronic products, mobile communication equipment, and electric vehicles. field has been widely used. However, with the expansion of application fields, higher requirements are put forward for the energy density and power of lithium-ion secondary batteries, which makes the safety of batteries more and more prominent. [0003] The main reason for the safety problem of lithium-ion secondary batteries is that the electrolyte of commercial lithium-ion secondary batteries con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0565H01M10/056H01M10/0525H01M10/42
CPCH01M10/0565H01M10/056H01M10/0525H01M10/4235H01M2300/0085H01M2300/0091Y02E60/10
Inventor 杨立章正熙廖柱
Owner RESONAC CORP
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