Preparation method of novel all-solid-state lithium ion battery

A lithium-ion battery, all-solid-state technology, applied in the direction of battery electrodes, secondary batteries, circuits, etc., can solve the problems of high hardness, limited application, and fragility of oxide solid electrolyte particles, and is suitable for large-scale production and increased The effect of exerting gram capacity and simple preparation method

Active Publication Date: 2019-09-13
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The order of lithium ion conductivity is sulfide (10 -3 -10 -2 S/cm)>Oxide (10 -4 -10 -3 S/cm)>Polymer(10 -8 -10 -5 S/cm), because the polymer is easy to form a thin film and the amorphous sulfide is easy to compress, the two are currently the most widely used, but the polymer is organic, and the sulfide will react when it comes into contact with air. The potential safety hazards are also great. In addition, the electrochemical windows of polymer and sulfide solid electrolytes are narrow, which is not conducive to the application of high-voltage cathode materials.
The oxide solid electrolyte all-solid-state battery has the best safety, wide elec

Method used

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  • Preparation method of novel all-solid-state lithium ion battery
  • Preparation method of novel all-solid-state lithium ion battery
  • Preparation method of novel all-solid-state lithium ion battery

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0041] A preparation method of a novel all-solid-state lithium-ion battery, comprising the following steps:

[0042] Step 1: The positive electrode active material 1, the conductive agent 2 and the binder solid electrolyte Li 3 OX 3 is mixed and dispersed uniformly as a positive electrode ingredient;

[0043] Step 2: Negative electrode active material 7, conductive agent 2 and binder solid electrolyte Li 3 OX 3 is mixed and dispersed evenly as the negative electrode ingredient;

[0044] Step 3: Combine the main body solid electrolyte 4 with the binder solid electrolyte Li 3 OX 3 is mixed and dispersed uniformly as a solid electrolyte layer ingredient;

[0045] Step 4: Coating the positive electrode ingredients on the positive electrode current collector, coating the negative electrode ingredients on the negative electrode current collector, stacking the negative electrode current collector, negative electrode ingredients, solid electrolyte layer ingredients, positive electr...

specific Embodiment approach 2

[0054] A preparation method of a novel all-solid-state lithium-ion battery, comprising the following steps:

[0055] Step 1: The positive electrode active material 1, the conductive agent 2 and the binder solid electrolyte Li 3 OX 3 is mixed and dispersed uniformly as a positive electrode ingredient;

[0056] Step 2: Combine the main body solid electrolyte 4 with the binder solid electrolyte Li 3 OX 3 is mixed and dispersed uniformly as a solid electrolyte layer ingredient;

[0057] Step 3: Coating the positive electrode ingredients on the positive electrode current collector, stacking the positive electrode current collector, positive electrode ingredients and solid electrolyte layer ingredients in sequence to form a stack, and then applying pressure to the stack at a temperature of 282-400 ° C Sintering for 0.5h-48h to form a combination of positive electrode sheet and solid electrolyte layer;

[0058] Step 4: Coating the molten metal lithium-based material 6 on the solid...

Embodiment 1

[0066] (1) Preparation of positive electrode ingredient P1

[0067] The positive electrode active material LiFePO 4 , conductive carbon black and binder solid electrolyte Li 3 OCl is mixed, and put into a ball mill or a stirring tank for ball milling or stirring to obtain a uniformly dispersed positive electrode ingredient P1. In the positive electrode ingredient P1, the solid component contains 85wt% LiFePO 4 , 10wt% binder solid electrolyte Li 3 OCl and 5 wt% conductive carbon black.

[0068] (2) Preparation of negative electrode ingredient N1

[0069] Graphite, conductive carbon black and solid electrolyte Li 3 OCl is mixed, and put into a ball mill or a stirring tank for ball milling or stirring to obtain a uniformly dispersed negative electrode ingredient N1. In the negative electrode ingredient N1, the solid component includes 85wt% graphite and 10wt% solid electrolyte Li 3 OCl and 5 wt% conductive carbon black.

[0070] (3) Preparation of solid electrolyte layer i...

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Abstract

The invention relates to a preparation method of a novel all-solid-state lithium ion battery, belonging to the technical field of lithium ion batteries. The preparation method comprises the steps of:mixing and uniformly dispersing a cathode active substance, a conductive agent and Li3OX as a cathode ingredient; mixing and uniformly dispersing an anode active substance, the conductive agent and Li3OX as an anode ingredient; mixing and uniformly dispersing a main body solid electrolyte and Li3OX as a solid electrolyte layer ingredient; coating the cathode ingredient on a cathode current collector, coating the anode ingredient on the anode current collector, stacking the anode current collector, the anode ingredient, the solid electrolyte layer ingredient, the cathode ingredient and the cathode current collector in order layer by layer to form a solid battery laminated cell, performing sintering of the solid battery laminated cell at a temperature of 282-400 DEG C while applying the pressure to the solid battery laminated cell, packaging the sintered solid battery laminated cell by adopting a battery membrane shell to obtain a novel all-solid-state lithium ion battery. The preparation method is simple, friendly in preparation environment, and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a preparation method of a novel all-solid-state lithium-ion battery. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, long cycle life and environmental friendliness, and are widely used in portable electronic products such as mobile phones and notebook computers and new energy vehicles. However, due to the excessive pursuit of the energy density of batteries, the safety of lithium-ion batteries is facing serious challenges, and accidents of lithium-ion batteries exploding and catching fire frequently occur. [0003] In order to obtain lithium-ion batteries with high energy density and high safety, all-solid-state batteries have entered the stage of lithium-ion batteries. The all-solid-state battery is to replace the electrolyte in the traditional lithium-ion battery with a solid electrolyte, and change the ...

Claims

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Application Information

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IPC IPC(8): H01M10/0585H01M10/0525H01M10/0562H01M4/62
CPCH01M4/621H01M10/0525H01M10/0562H01M10/0585H01M2300/0071Y02E60/10Y02P70/50
Inventor 田义军申红光叶璐刘城赖冠全何江龙李俊义徐延铭
Owner ZHUHAI COSMX BATTERY CO LTD
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