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Carbon-containing sulfide solid electrolyte for solid-state lithium battery and preparation method of carbon-containing sulfide solid electrolyte

A technology of solid electrolytes and sulfides, applied in solid electrolytes, non-aqueous electrolytes, secondary batteries, etc., can solve problems such as disappearance, achieve the effects of improving electronic conductance, reducing interface resistance, and improving stability

Active Publication Date: 2021-05-07
ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the oxide cathode material has both ionic and electronic conductivity, electrons can eliminate the lithium ion concentration gradient on one side of the electrode, thereby making the space charge layer on the electrode side disappear.

Method used

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  • Carbon-containing sulfide solid electrolyte for solid-state lithium battery and preparation method of carbon-containing sulfide solid electrolyte
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  • Carbon-containing sulfide solid electrolyte for solid-state lithium battery and preparation method of carbon-containing sulfide solid electrolyte

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preparation example Construction

[0024] A method for preparing a carbon-containing sulfide solid electrolyte for a solid-state lithium battery, comprising the following steps: first, fully mixing the sulfide solid electrolyte and organic matter according to the mass ratio to obtain a mixture, and the mass ratio of the organic matter is 0.01%-20%. Among them, the sulfide solid electrolyte includes Li 7 P 2 S 8 I. Li 10 GeP 2 S 12 , Li 3.25 Ge 0.25 P 0.75 S 4 , Li 7 GePS 8 , Li 9.54 Si 1.74 P 1.44 S 11.7 Cl 0.3 , Li 5.4 P.S. 4.4 Cl 1.6 , Li 6 P.S. 5 Cl, Li 2 S·P 2 S 5 · LiCl, Li 6 P.S. 5 Br, Li 2 S·P 2 S 5 ·LiBr、Li 6 P.S. 5 I. Li 2 S·P 2 S 5 · LiI, Li 4 SnS 4 , Li 2 SnS 3 , Li 3 P.S. 4 , Li 7 P 3 S 11 , Li 2 S GeS 2 , Li 2 S·P 2 S 5 , Li 2 S·As 2 S 5 ·SnS 2 , Li 4 P.S. 4 I. Li 7 P 2.9 S 10.85 Mo 0.01 , Li 2 S·P 2 S 5 .P 2 o 5 , Li 9.6 P 3 S 12 , Li 7 P 2.9 mn 0.01 S 10.7 I 0.3 , Li 10 SnP 2 S 12 , Li 10 SiP 2 S 12 , Li 10.35 sn 0.27 Si...

Embodiment 1

[0028] The preparation method of carbon-containing sulfide solid electrolyte, selects sulfide solid electrolyte Li in the present embodiment 6 P.S. 5 Cl and polycyclic aromatic hydrocarbon organic matter perylenetetracarboxylic dianhydride are weighed at a mass ratio of 98:2, and mixed by ball milling. The ball milling line speed is 5m / s, and the ball milling time is 1h. After the mixing is completed, the materials are placed in a sintering furnace for sintering , the sintering temperature is preferably 400°C, the heating rate is 5°C / min, the holding time is 2h, after the holding is completed, it is cooled to room temperature, and the solid electrolyte containing carbon sulfide is obtained after crushing.

Embodiment 2-8

[0033]

[0034] As shown in the table above, changing the sulfide solid electrolyte Li 6 P.S. 5 The mass ratio of Cl and polycyclic aromatic hydrocarbon organic matter perylenetetracarboxylic dianhydride is mixed by ball milling, the ball milling line speed is 5m / s, and the ball milling time is 1h. After the mixing is completed, the material is placed in a sintering furnace for sintering. The sintering temperature is preferably 400°C, the heating rate is 5°C / min, and the holding time is 2h. After the holding is completed, it is cooled to room temperature and crushed to obtain a carbon-sulfide solid electrolyte.

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Abstract

The invention discloses a carbon-containing sulfide solid electrolyte for a solid-state lithium battery and a preparation method of the carbon-containing sulfide solid electrolyte. The carbon-containing sulfide solid electrolyte is obtained by mixing a sulfide solid electrolyte with an organic matter and then sintering. The electronic conductivity of the carbon-containing sulfide solid electrolyte is obviously improved, the carbon-containing sulfide solid electrolyte is mixed with an oxide positive electrode to form an ion-electron hybrid network positive electrode with higher electronic conductivity, the interface resistance is reduced, and the stability of the positive electrode is improved.

Description

technical field [0001] The invention relates to a sulfide solid electrolyte, in particular to a carbon-containing sulfide solid electrolyte for a solid lithium battery and a preparation method thereof. Background technique [0002] As a secondary battery, lithium-ion batteries are successfully used in all aspects of today's society. With the progress of the times and the development of science and technology, the requirements for lithium-ion batteries are getting higher and higher. Lithium-ion batteries not only need to have high energy density and power density, but also have the characteristics of long service life and high safety performance. Especially in the field of electric vehicles and large-scale energy storage points, the safety requirements for lithium-ion batteries are becoming more and more urgent. At present, commercial lithium-ion batteries have serious safety problems due to their flammable organic liquid electrolytes. When the batteries are overcharged, int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/0525H01M10/42
CPCH01M10/0562H01M10/0525H01M10/4235H01M2300/0068Y02E60/10
Inventor 陈伟林林久许晓雄
Owner ZHEJIANG FUNLITHIUM NEW ENERGY TECH CO LTD
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