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Halide solid electrolyte, preparation method thereof and lithium ion battery

A solid electrolyte and halide technology, applied in the field of battery electrolytes, can solve the problems of long synthesis cycle of halide solid electrolyte, cumbersome preparation process, long sintering time, etc., and achieve the advantages of short sintering time, simple preparation process and reduction of lithium loss. Effect

Inactive Publication Date: 2020-04-10
蜂巢能源(武汉)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a halide solid electrolyte and its preparation method and lithium ion battery, so as to solve the technical problems of the halide solid electrolyte in the prior art, such as long synthesis cycle, cumbersome preparation process, high sintering temperature and long sintering time

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  • Halide solid electrolyte, preparation method thereof and lithium ion battery
  • Halide solid electrolyte, preparation method thereof and lithium ion battery
  • Halide solid electrolyte, preparation method thereof and lithium ion battery

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preparation example Construction

[0022] The first aspect of the embodiments of the present invention provides a method for preparing a halide solid electrolyte, comprising the following steps: ball milling lithium halide and non-metal halide to obtain a mixture; and performing spark plasma sintering or electric field assisted sintering on the mixture. Specifically: Weigh lithium halides and non-metal halides respectively, and put the weighed lithium halides and non-metal halides into a ball mill tank for ball milling to obtain a mixture; put the mixture into a mold, and place the mold in a discharge plasma The halide solid electrolyte can be obtained by sintering in a sintering system of sintering or electric field assisted sintering.

[0023] In the preparation method of the above-mentioned halide solid electrolyte, before the sintering step, it can be obtained only by ball milling once, and the preparation process is simple. Compared with the traditional preparation method, the synthesis efficiency is greatl...

Embodiment 1

[0033] Weigh 12g lithium chloride (LiCl) and 4g indium chloride (InCl 3 ), put the above-mentioned powder into a ball mill jar equipped with zirconia balls, use isopropanol as a mixing agent, and the mass ratio of isopropanol to powder is 5:1. The rotational speed of the ball mill was adjusted to 350r / min, and the ball milling time was 60h. After the ball milling, the powder was put into a vacuum drying oven with a drying temperature of 80°C, and the drying time was 8h. Take out 12g of dried powder and pour it into a sintering mold, and then place the sintering mold in a sintering container. Surface activation is first performed on the above mixture powder material particles to enhance the reactivity of the mixture, wherein the activation voltage is 5V, the current is 3A, and the activation time is 30s. Then, under the protection of argon atmosphere, plasma activated rapid sintering was carried out, and the temperature was raised from room temperature to 250 °C at a rate of 1...

Embodiment 2

[0037] Weigh 12g lithium bromide (LiBr) and 4g yttrium bromide (YBr 3 ), put the above-mentioned powder into a ball mill tank equipped with zirconia balls, use isopropanol as a mixing agent, and the mass ratio of isopropanol to powder is 6:1, and the rotating speed of the ball mill is adjusted to 400r / min, and the ball milling time is 55 hours. After the ball milling, put the powder into a vacuum drying oven with a drying temperature of 60°C, and the drying time is 6 hours. Take out 2g of dried powder and pour it into a sintering mold, and then place the sintering mold in a sintering container. Surface activation is first performed on the above mixture powder material particles to enhance the reactivity of the mixture, wherein the activation voltage is 10V, the current is 5A, and the activation time is 60s. Then, under the protection of argon atmosphere, plasma activated rapid sintering was carried out, and the temperature was raised from room temperature to 150 °C at a rate...

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Abstract

The invention provides a halide solid electrolyte, a preparation method thereof and a lithium ion battery. The preparation method of the halide solid electrolyte comprises the following steps: ball-milling lithium halide and non-metal halide to obtain a mixture; and carrying out spark plasma sintering or electric field assisted sintering on the mixture. According to the preparation method, the halide solid electrolyte is prepared by adopting a spark plasma sintering or electric field assisted sintering mode. Compared with a traditional sintering mode, the method has the advantages that the sintering temperature is low, the sintering time is short, the loss of lithium is reduced, and the obtained halide is of a nanocrystallization structure, so that the conductivity of lithium ions is improved. According to the preparation method, only one-time ball-milling mixing is needed before the sintering step, the preparation process is simple, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of battery electrolytes, in particular to a halide solid electrolyte, a preparation method thereof, and a lithium ion battery. Background technique [0002] At present, lithium-ion batteries are widely used in various portable digital electronic products and new energy vehicles. Obtaining high energy density, safe and reliable lithium-ion batteries is the key to their further development. Due to the existence of flammable and explosive liquid electrolyte in traditional lithium-ion batteries, it often has potential safety hazards. Preparation of lithium-ion batteries with high safety performance will have epoch-making significance. [0003] All-solid-state batteries using inorganic solid electrolytes have become a strong competitor for the new generation of energy storage devices due to their advantages such as high safety and high energy density. The large-scale application of solid electrolytes should not...

Claims

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Application Information

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IPC IPC(8): H01M10/0562H01M10/0525
CPCH01M10/0525H01M10/0562H01M2300/002Y02E60/10
Inventor 阳敦杰
Owner 蜂巢能源(武汉)有限公司
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