Electrode, electrolyte thin layer and preparation method thereof

A technology of electrolyte and solid electrolyte, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, battery electrodes, etc., can solve problems such as increased production costs, chemical instability of sulfides, and narrow electrochemical stability window of sulfide electrolytes, and achieves improved Effects of energy density, increased energy density, and good solid-solid contact

Inactive Publication Date: 2021-03-09
CHINA AUTOMOTIVE BATTERY RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, sulfide electrolytes are extremely sensitive to air and water, and are prone to produce toxic gases such as hydrogen sulfide. Therefore, they need to be produced and operated in an environment where inert gas is a protective atmosphere, which increases their production costs and limits their large-scale production and application capabilities; Secondly, the electrochemical stability window of sulfide electrolyte is narrow (1.7-2.8V), which is different from that of oxide electrode materials (such as LiCoO 2 , NMC, Graphite, etc.) will u...

Method used

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  • Electrode, electrolyte thin layer and preparation method thereof
  • Electrode, electrolyte thin layer and preparation method thereof
  • Electrode, electrolyte thin layer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Embodiment 1 aqueous phase forms Li 3 InCl 6 Coated LiCoO 2 Cathode material

[0091] 75mg of Li 3 InCl 6 Dissolve in 2g of water, then add 425mg of LiCoO 2 , dried at 100°C, and then transferred to a vacuum oven at 200°C for further dehydration and drying to obtain L i3 InCl 6 Coated LiCoO 2 ; The whole experimental process does not need inert atmosphere protection.

[0092] figure 1 Among them, (a) represents the specific synthesis process; Heating represents heating, Vacuum represents the vacuum condition; (b,c) represents the LiCoO before coating 2 SEM photos of ; (d, e) represent the coated LiCoO 2 SEM photographs.

Embodiment 2

[0093] Embodiment 2 aqueous phase forms Li in situ 3 InCl 6 Coated LiCoO 2 Cathode material

[0094] 27.4mg of LiCl and 47.6mg of InCl 3 Dissolve in water, then add 425mg of LiCoO 2 , placed in a 100-degree oven to evaporate to dryness, and then transferred to a 200-degree vacuum oven to react for 5 hours. get Li 3 InCl 6 Coated LiCoO 2 , (Li 3 InCl 6 with LiCoO 2 The mass ratio is 15:85). The whole experimental process does not need inert atmosphere protection.

[0095] figure 2 Among them, (a) indicates the specific synthesis process; Heating indicates heating, and Vacuum indicates vacuum conditions; (b) LiCoO before coating 2 SEM images of ; (c,d) coated LiCoO 2 SEM photos of ; (e) coated with different contents of Li 3 InCl 6 LiCoO 2 The first charge-discharge curve; (f) Coating with different contents of Li 3 InCl 6 LiCoO 2 cycle stability. The abscissa of (e) represents the discharge specific capacity, and the ordinate represents the voltage to the ...

Embodiment 3

[0096] Embodiment 3 organic phase forms Li 3 InCl 6 Coated NMC532 cathode material

[0097] 75mg of Li 3 InCl 6 and 425 mg of NMC532 in 2 g of ethanol, ultrasonically dispersed for 5 minutes, then transferred to a 100-degree oven for drying, and then transferred to a 200-degree vacuum oven for further desolvation and drying. get Li 3 InCl 6 Coated NMC532 (NMC532 and Li 3 InCl 6 The mass ratio is 85:15), and the whole experimental process does not need inert atmosphere protection.

[0098] Control the NMC532 and Li respectively in basically the same way 3 InCl 6 The mass ratio is 80:20, 90:10, prepared and coated with different contents of Li 3 InCl 6 The NMC532.

[0099] image 3 Among them, (a) represents the specific synthesis process; Ethanol represents ethanol, Heating represents heating, Vacuum represents vacuum conditions; (b) represents the coating with different contents of Li 3 InCl 6 Electron micrograph of NMC532.

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Abstract

The invention relates to the technical field of secondary batteries, in particular to an electrode, an electrolyte thin layer and a preparation method thereof. An electrode is prepared from a halide solid electrolyte material, the solid electrolyte material is LiaMXb, M is one or more of Al, Ga, In, Sc, Y and La series, X is one or more of F, Cl and Br, a is greater than or equal to 0 and less than or equal to 10, and b is greater than or equal to 1 and less than or equal to 13. According to the invention, the ionic conductivity, the chemical/electrochemical stability and the plasticity can beremarkably improved; and in the manufacturing process of the electrode and the electrolyte, inert atmosphere protection is not needed, the method is very compatible with a traditional electrode manufacturing technology, the process is simple, the cost is low, the large-scale production capacity is extremely achieved, and therefore the commercial application value is extremely achieved.

Description

technical field [0001] The invention relates to the technical field of secondary batteries, in particular to an electrode, an electrolyte thin layer and a preparation method thereof. Background technique [0002] Compared with the current commercial liquid secondary batteries, all-solid-state secondary batteries have higher safety and higher energy density. This is because the all-solid-state secondary battery uses a non-flammable solid-state fast ion conductor material as the electrolyte. With the development in recent years, several ion conductivity higher than 1mS cm have been developed -1 solid electrolyte material. Especially with Li 10 Ge 2 P 2 S 12 , Li 6 P.S. 5 Cl, Li 7 P 3 S 11 and Li 3 P.S. 4 The representative sulfide solid electrolyte. However, sulfide electrolytes are extremely sensitive to air and water, and are prone to produce toxic gases such as hydrogen sulfide. Therefore, they need to be produced and operated in an environment where inert gas...

Claims

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Application Information

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IPC IPC(8): H01M4/131H01M10/0562H01M10/052H01M10/0525H01M10/058
CPCH01M4/131H01M10/052H01M10/0525H01M10/0562H01M10/058Y02E60/10Y02P70/50
Inventor 孙学良王长虹梁剑文李晓娜黄欢卢世刚张立赵尚骞
Owner CHINA AUTOMOTIVE BATTERY RES INST CO LTD
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