All-solid-state battery and preparation method thereof

A technology of all-solid-state batteries and solid-state electrolytes, applied in the manufacture of electrolyte batteries, secondary batteries, non-aqueous electrolyte batteries, etc., can solve problems such as consumption, hidden dangers of explosion, ignition of organic electrolytes, etc., to improve ion conductivity and for the first time Coulombic efficiency, improvement of cycle life and power life, and the effect of battery safety performance guarantee

Inactive Publication Date: 2019-10-25
GUANGZHOU TINCI MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, commercial lithium-ion batteries release a large amount of heat when a short circuit occurs, which will ignite the organic electrolyte and cause explosion hazards. Obviously, it is difficult to be widely used.
Even the Tesla car, which is currently considered the safest, uses a complex battery management system and protective measures, and there have been many fire and explosion accidents in just a few years after it came out
In addition, there are still problems with organic electrolytes: limited electrochemical window, difficult to be compatible with metal lithium anodes and newly developed high-potential cathode materials; lithium ions are not the only carriers, and the internal resistance of the battery will be affected by the The appearance of the ion concentration gradient increases (concentration polarization), and the performance of the battery decreases; the working temperature is limited (safe working temperature 0-40°C); it reacts with the negative electrode material to form a solid electrolyte interphase (SEI) layer, resulting in two materials Continuous consumption, so that the battery capacity continues to decline
However, this solid-state battery is always a solid-state battery with a sulfide solid-state electrolyte, which cannot suppress the shuttle effect of polysulfides in the solid-state electrolyte in practical applications, and the production of solid-state batteries needs to be produced and stored under an inert atmosphere such as argon, which is easy high production cost

Method used

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  • All-solid-state battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] This embodiment provides an all-solid-state battery, the preparation method of which comprises:

[0065] (1) 70g lithium nickel cobalt aluminate (LiNi 0.8 co 0.1 al 0.1 o 2 ) cathode material and 30g Li 13 Si 2 al 3 N 6 o 6 The solid electrolyte powder is mixed and cast into a 5mm thick film with collodion;

[0066] (2) After the casting film is dried, it is punched into a positive electrode sheet with a diameter of 10mm for use;

[0067] (3) 20g Li 13 Si 2 al 3 N 6 o 6 The solid electrolyte powder is cast into a 1mm thick film with collodion;

[0068] (4) After the casting film is dried, it is punched into a solid electrolyte sheet with a diameter of 10mm;

[0069] (5) The solid electrolyte sheet is stacked on the positive electrode sheet and hot-pressed and sintered together, the sintering pressure is 300MPa, the sintering temperature is 300°C, and the sintering time is 10min;

[0070] (6) Cold-press the lithium negative electrode material with a diame...

Embodiment 2

[0073] This embodiment provides an all-solid-state battery, the preparation method of which comprises:

[0074] (1) 70g lithium nickel cobalt manganate (LiNi 0.8 co 0.1 mn 0.1 o 2 ) cathode material and 30g Li 6 Ga 2 N 2 o 3 The solid electrolyte powder is mixed and cast into a 5mm thick film with collodion;

[0075] (2) After the casting film is dried, it is punched into a positive electrode sheet with a diameter of 10mm for use;

[0076] (3) 20g Li 6 Ga 2 N 2 o 3 The solid electrolyte powder is cast into a 1mm thick film with collodion;

[0077] (4) After the casting film is dried, it is punched into a solid electrolyte sheet with a diameter of 10 mm;

[0078] (5) The solid electrolyte sheet is stacked on the positive electrode sheet and hot-pressed and sintered together, the sintering pressure is 300MPa, the sintering temperature is 300°C, and the sintering time is 10min;

[0079] (6) cold-press the lithium-gallium alloy negative electrode material with a diam...

Embodiment 3

[0082] This embodiment provides an all-solid-state battery, the preparation method of which comprises:

[0083] (1) 70g magnesium chromate positive electrode material and 30g Mg 5 SnBi 2 Se 9 The solid electrolyte powder is mixed and cast into a 5mm thick film with collodion;

[0084] (2) After the casting film is dried, it is punched into a positive electrode sheet with a diameter of 10mm for use;

[0085] (3) 20g Mg 5 SnBi 2 Se 9 The solid electrolyte powder is cast into a 1mm thick film with collodion;

[0086] (4) After the casting film is dried, it is punched into a solid electrolyte sheet with a diameter of 10 mm;

[0087] (5) The solid electrolyte sheet is stacked on the positive electrode sheet and hot-pressed and sintered together, the sintering pressure is 300MPa, the sintering temperature is 300°C, and the sintering time is 10min;

[0088] (6) cold-press the tin-bismuth alloy negative electrode material with a diameter of 10mm and a thickness of 2mm on the s...

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Abstract

The invention relates to the technical field of all-solid-state batteries, and specifically discloses an all-solid-state battery and a preparation method thereof. The all-solid-state battery comprisesa positive plate, a negative plate and a solid-state electrolyte plate located between the positive plate and the negative plate, wherein the solid-state electrolyte plate is made of a first solid-state electrolyte material, and the positive plate is made of a positive electrode material and a second solid-state electrolyte material. The all-solid-state battery improves the intrinsic properties and electrochemical performance of the battery, and improves the ion conductivity of the solid-state electrolyte. In addition, the all-solid-state battery is simple in preparation process, has repeatability and mass production and has great application and popularization values.

Description

technical field [0001] The invention relates to the technical field of all-solid-state batteries, in particular to an all-solid-state battery and a preparation method thereof. Background technique [0002] New energy vehicles put forward higher requirements for power batteries. In addition to meeting the requirements of long cruising range and high-power charging and discharging, the safety of automotive power lithium batteries is particularly important. At present, commercial lithium-ion batteries release a large amount of heat when a short circuit occurs, which will ignite the organic electrolyte and cause an explosion hazard, which is obviously difficult to be widely used. Even the Tesla car, which is currently considered the safest, uses a complex battery management system and protective measures, and there have been many fire and explosion accidents in just a few years after it came out. In addition, there are still problems with organic electrolytes: limited electroc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0562H01M10/058H01M4/13H01M4/02
CPCH01M4/13H01M10/0562H01M10/058H01M2004/028Y02E60/10Y02P70/50
Inventor 何天贤高远鹏吴宇鹏余乐范伟贞赵经纬徐三善徐金富
Owner GUANGZHOU TINCI MATERIALS TECH
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