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A kind of electrolyte membrane and its preparation method and battery

A technology of electrolyte membrane and solid electrolyte, which is applied in the field of electrolyte membrane, its preparation, semi-solid battery and all-solid battery, which can solve the problems of poor uniformity of electrolyte membrane, time-consuming and difficult process control, and improve the working temperature range , easy process method, simple and easy-to-control effect

Active Publication Date: 2022-04-08
SVOLT ENERGY TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of wet homogenate coating requires multiple steps such as mixing, homogenizing, coating, and drying. Not only is the process complicated, but also the process control is difficult. The electrolyte membrane produced has poor uniformity and is difficult to scale up.
Moreover, because the solubility and solvent stability of different materials are different, it takes a lot of time and energy to screen solvents; in addition, the solvent is volatilized by using organic solvent mixture and drying, which not only causes an increase in production costs, but also affects The environment is very unfriendly

Method used

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  • A kind of electrolyte membrane and its preparation method and battery
  • A kind of electrolyte membrane and its preparation method and battery
  • A kind of electrolyte membrane and its preparation method and battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The invention provides a semi-solid electrolyte membrane and a preparation method thereof, the method comprising:

[0062] At room temperature, weigh the LLZO solid electrolyte and PTFE powder at a mass ratio of 40:60, place them in a high-speed disperser, pulse-stir at 20,000rpm, stir for 1.5min and stop for 1min, after stirring for 5min, put the mixed material on the roller In the press, the heating temperature of the roller press is 200°C, and the rotation speed is 10rpm, and the powder is rolled into a self-supporting semi-solid electrolyte membrane. The optical photo is as follows: figure 1 .

Embodiment 2

[0064] The invention provides a semi-solid electrolyte membrane and a preparation method thereof, the method comprising:

[0065] In a room temperature environment, weigh the LLZTO solid electrolyte and PTFE powder at a mass ratio of 50:50, place it in a high-speed disperser, pulse stirring at 15000rpm, stir for 1min and stop for 1min, after stirring for 10min, put the mixed material on a roller press In the machine, the heating temperature of the roller press is 150°C, the rotation speed is 5rpm, and the powder is rolled into a self-supporting semi-solid electrolyte membrane. The optical photo is as follows: figure 2 .

Embodiment 3

[0067] The invention provides a semi-solid electrolyte membrane and a preparation method thereof, the method comprising:

[0068] At room temperature, weigh the LLZO solid electrolyte and styrene-butadiene rubber powder at a mass ratio of 55:45, place it in a high-speed disperser, stir at 21,000rpm in pulse mode, stir for 3.5min and stop for 2.5min, after stirring for 20min, mix the material Put it in a roller press machine with a heating temperature of 215° C. and a rotation speed of 6 rpm to roll the powder into a self-supporting semi-solid electrolyte membrane.

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Abstract

The invention discloses an electrolyte membrane, a preparation method thereof and a battery. The method comprises the following steps: 1) mixing the fibrous polymer powder and the solid electrolyte as the main body of the material under high-speed shearing, and the speed of the high-speed shearing is ≥ 1000 rpm to obtain a mixture; 2) performing hot-pressing treatment on the mixture , to a preset thickness to obtain an electrolyte membrane. The invention provides a dry preparation method of an electrolyte membrane. By shearing and stirring a fibrous polymer at a high speed, the polymer is fibrously drawn under the shearing force, and then formed into a film by hot pressing, and the fibrous polymerization The materials are randomly overlapped during the hot-pressing film forming process to form a polymer network with abundant pores, and the solid electrolyte is dispersed and bonded in the polymer network to obtain an electrolyte membrane. The invention can solve the problems in the prior art that the organic liquid electrolyte is inflammable and explosive, the electrochemical window is low, and the working temperature range is small.

Description

technical field [0001] The invention relates to the technical field of batteries, and relates to an electrolyte membrane, a preparation method thereof, and a battery, in particular to an electrolyte membrane, a preparation method thereof, a semi-solid battery and an all-solid battery. Background technique [0002] With the rapid development of new energy vehicles, the requirements for the energy density and safety performance of vehicle energy storage devices continue to increase. Lithium-ion batteries with the advantages of high specific energy, high specific power, good cycle performance, and no environmental pollution are considered to be best choice. It is estimated that by 2025, the energy density of power batteries will reach more than 500Wh / kg. With the continuous improvement of power battery energy density, its safety performance is also facing more severe tests. In addition, in recent years, a large number of electronic products have been popularized. Lithium batt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M50/403H01M50/44H01M50/446H01M50/491H01M50/497H01M10/052H01M10/0562
CPCH01M10/052H01M10/0562Y02E60/10
Inventor 马忠龙秦士林蔡挺威赵晓宁郑晓醒
Owner SVOLT ENERGY TECHNOLOGY CO LTD