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

A lithium-ion battery, all-solid-state technology, applied in secondary batteries, electrode manufacturing, solid electrolyte, etc., can solve the problems of unsatisfactory lithium-ion conductivity and high interface impedance between electrodes and electrolytes

Inactive Publication Date: 2020-12-08
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, many organic-inorganic hybrid electrolytes still have the problem of high electrode-electrolyte interface impedance and unsatisfactory lithium ion conductivity. Therefore, the optimization of the preparation process needs to be solved urgently.

Method used

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

Examples

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Effect test

Embodiment 1

[0028] A method for preparing an integrated all-solid-state lithium-ion battery, comprising the following steps:

[0029] a. Preparation of solid inorganic electrolyte:

[0030] Lanthanum source La 2 o 3 Pre-sintered at 900 °C for 12 hours, and then the lithium source Li 2 O, lanthanum source La 2 o 3 , zirconium source ZrO 2 , tantalum source Ta 2 o 5 After mixing in a molar ratio of 3.68:1.5:1.4:0.3 and ball milling in an isopropanol solution for 16 hours, the solution was centrifuged and dried in air at 60°C for 12 hours, and the obtained powder was sintered at 900°C for 10 hours. The prepared garnet-type solid oxide Li 6.4 La 3 Zr 1.4 Ta 0.6 o 12 ;

[0031] b. Preparation of organic-inorganic hybrid electrolyte:

[0032] Dissolve the garnet-type solid oxide LLZTO obtained in step a in acetonitrile and ball mill at a speed of 400r for 12 hours to obtain an acetonitrile suspension of micron-sized oxides, wherein the concentration of the garnet-type solid oxide ...

Embodiment 2

[0036] A method for preparing an integrated all-solid-state lithium-ion battery, comprising the following steps:

[0037] a. Preparation of solid inorganic electrolyte:

[0038] Lanthanum source La 2 o 3 Pre-sintered at 900 °C for 12 hours, and then the lithium source Li 2 O, lanthanum source La 2 o 3 , zirconium source ZrO 2 , tantalum source Ta 2 o 5 After mixing in a molar ratio of 3.68:1.5:1.4:0.3 and ball milling in an isopropanol solution for 16 hours, the solution was centrifuged and dried in air at 60°C for 12 hours, and the obtained powder was sintered at 900°C for 10 hours. The prepared garnet-type solid oxide Li 6.4 La 3 Zr 1.4 Ta 0.6 o 12 ;

[0039] b. Preparation of organic-inorganic hybrid electrolyte:

[0040] Dissolve the garnet-type solid oxide LLZTO obtained in step a in acetonitrile and ball mill at a speed of 400r for 12 hours to obtain an acetonitrile suspension of micron-sized oxides, wherein the concentration of the garnet-type solid oxide ...

Embodiment 3

[0044] A method for preparing an integrated all-solid-state lithium-ion battery, comprising the following steps:

[0045] a. Preparation of solid inorganic electrolyte:

[0046] Lanthanum source La 2 o 3 Pre-sintered at 900 °C for 12 hours, and then the lithium source Li 2 O, lanthanum source La 2 o 3 , zirconium source ZrO 2 , tantalum source Ta 2 o 5 After mixing in the molar ratio of 3.68:1.5:1.4:0.3 and ball milling in isopropanol solution for 16-24 hours, the solution was centrifuged and dried in air at 60°C for 12 hours, and the obtained powder was sintered at 900°C for 10 -16 hours, the garnet-type solid oxide Li was prepared 6.4 La 3 Zr 1.4 Ta 0.6 o 12 ;

[0047] b. Preparation of organic-inorganic hybrid electrolyte:

[0048] Dissolve the garnet-type solid oxide LLZTO obtained in step a in acetonitrile and ball mill at a speed of 400r for 12 hours to obtain an acetonitrile suspension of micron-sized oxides, wherein the concentration of the garnet-type so...

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Abstract

The invention discloses a preparation method of an integrated all-solid-state lithium ion battery. The preparation method comprises the following steps: preparation of a solid-state inorganic electrolyte, preparation of an organic-inorganic hybrid electrolyte and preparation of the all-solid-state lithium ion battery. The method has the advantages that a certain amount of electrolyte is added intothe electrode, and the electrode is artificially infiltrated into the electrolyte, so that the active contact sites of the electrode and the electrolyte are increased, and the mutual infiltration degree of the interface of the electrode and the solid electrolyte of the all-solid-state lithium ion battery after annealing treatment is deepened; more channels are provided for lithium ion conduction,and the interface internal resistance between the prepared all-solid-state lithium ion battery electrode and the electrolyte is reduced.

Description

technical field [0001] The invention belongs to the technical field of all-solid-state lithium-ion batteries, and in particular relates to a preparation method of an integrated all-solid-state lithium-ion battery. Background technique [0002] As the most important energy storage and conversion device, rechargeable batteries have been used to power most portable electronic devices and electric vehicles, and to store electricity generated from intermittent renewable resources such as wind and solar. Among commercial batteries (such as lead-acid batteries, nickel metal hydride batteries, lithium-ion batteries, etc.), lithium-ion batteries are the most widely used. However, conventional lithium-ion batteries usually use flammable non-aqueous electrolytes, which pose serious safety issues in use. Solid-state lithium-ion batteries that use solid-state electrolytes instead of traditional liquid electrolytes are considered to be a better solution to safety issues. In addition, si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04H01M10/056H01M10/0525
CPCH01M4/0407H01M4/0471H01M10/056H01M10/0525H01M2300/0065Y02E60/10
Inventor 贺德衍陈晨刘建德刘德全常英凡王婷孙楷
Owner LANZHOU UNIVERSITY
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