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Preparation method of safe high-rate and all-solid-state battery

An all-solid-state battery, high-rate technology, applied in the manufacture of electrolyte batteries, lithium batteries, non-aqueous electrolyte batteries, etc., can solve the problems affecting the rate performance of all-solid-state batteries, and achieve high current discharge capacity and good interface compatibility. , the effect of good lithium ion conductivity

Inactive Publication Date: 2016-07-20
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is an all-solid-state battery prepared by cold-pressing powder electrode materials. There is a large ion transfer resistance at the contact interface of different electrode materials and between electrode material particles, which greatly affects the rate performance of the all-solid-state battery.

Method used

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  • Preparation method of safe high-rate and all-solid-state battery
  • Preparation method of safe high-rate and all-solid-state battery
  • Preparation method of safe high-rate and all-solid-state battery

Examples

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preparation example Construction

[0031] A method for preparing a safe high-rate all-solid-state battery is characterized in that it includes the following manufacturing steps:

[0032] Step 1: In a dry environment, press the negative electrode current collector, negative electrode material, solid electrolyte, composite positive electrode, and positive electrode current collector into a battery pressing mold from bottom to top to form an all-solid-state battery before liquid injection;

[0033] Step 2: In a vacuum environment, inject a liquid electrolyte solution into the all-solid-state battery before liquid injection prepared in step 1;

[0034] Step 3: Inflate the vacuum environment after the ionic liquid was injected in Step 2, and take it out from the battery pressing mold to complete the production process of the safe high-rate all-solid-state battery.

[0035] The negative electrode current collector is a copper sheet, a silver sheet or a stainless steel sheet.

[0036] The negative electrode material ...

Embodiment

[0045] Make the battery pressing mold:

[0046] Such as Figure 3-Figure 4 As shown, the lower bearing block 12 and the upper bearing block 7 with coaxial convex circles, the straight cylindrical sleeve 8 sleeved on the lower bearing block and the upper bearing block, and the lower bearing The lower jacket 11 between the pressure block and the sleeve and the upper jacket 9 between the upper pressure block and the sleeve; a stripper ring between the lower jacket and the upper jacket made of polytetrafluoro or nylon 10. After putting the lower jacket on the lower bearing block, place a demoulding ring with the same inner and outer diameter as the lower jacket on the lower jacket, then put the sleeve into the demoulding ring and the lower jacket, and put the upper jacket Put it on the release ring in the sleeve and put it in the drying oven, and perform the following operations:

[0047] (1) A stainless steel sheet with a diameter of Φ10 is selected as the negative electrode cu...

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Abstract

The invention relates to a preparation method of a safe high-rate and all-solid-state battery. The method comprises the following steps: (1) pressing a negative current collector, a negative material, a solid electrolyte, a composite positive electrode and a positive current collector into a whole in a battery pressing mold from bottom to top in a dry environment to form the all-solid-state battery before liquid injection; (2) injecting a liquid electrolyte solution into the all-solid-state battery before liquid injection prepared in the step (1) in a vacuum environment; and (3) carrying out aerating treatment on the vacuum environment into which an ionic liquid is injected in the step (2) to prepare the safe high-rate and all-solid-state battery. The trace electrolyte is injected into the all-solid-state battery molded in a cold-press manner in the dry environment and is subjected to aerating treatment, so that the electrolyte is evenly dispersed into the all-solid-state battery. The trace electrolyte does not react with a solid electrolyte material and has good lithium-ion conduction ability, so that the contact resistance between the internal materials of the all-solid-state battery is reduced by the electrolyte as a transition electrolyte layer; and the high-current discharge capacity of the battery is greatly improved under the premise of ensuring the safety of the battery.

Description

technical field [0001] The invention belongs to the technical field of all-solid-state batteries, and in particular relates to a preparation method of a safe high-rate all-solid-state battery. Background technique [0002] All-solid-state batteries refer to new batteries that use solid electrolytes instead of organic liquid electrolytes in existing lithium batteries. Looking at battery safety issues from the perspective of battery scientific research, the chemical system composition and structure of the battery itself essentially determines the safety of this type of chemical power supply. Analyzing the current safety issues of lithium-ion batteries, it can be found that the physical nature of the combustion and explosion of lithium-ion batteries under high temperature, abuse, short circuit, etc. is caused by the instability of the organic electrolyte used in the battery composition under the above conditions. . Organic liquid electrolytes may burn and explode under certai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/052H01M10/058
CPCY02E60/10Y02P70/50
Inventor 徐志彬丁飞莫珊珊和冲冲
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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