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All-solid-state lithium battery positive plate, preparation method thereof and all-solid-state lithium battery

A cathode sheet, lithium battery technology, applied in battery electrodes, secondary batteries, solid electrolytes, etc., can solve the problems of poor battery rate performance and capacity performance, poor interface contact, and high interface resistance, and achieve high discharge capacity. The effect of poor contact and high lithium ion transport capacity

Active Publication Date: 2020-12-15
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides an all-solid-state lithium battery positive electrode sheet to at least solve the poor interface contact between the lithium-containing active material and the solid phase such as the solid electrolyte in the prior art, high interface resistance and the battery rate caused thereby. Problems such as poor performance and capacity performance

Method used

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  • All-solid-state lithium battery positive plate, preparation method thereof and all-solid-state lithium battery

Examples

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Embodiment 1

[0042] The all-solid-state lithium battery positive electrode sheet provided in this embodiment includes a positive electrode current collector and a functional layer coated on the positive electrode current collector. In terms of 100 parts by weight, the functional layer consists of 80 parts of lithium cobaltate, 3 parts of carbon nanotubes, 5 Parts of poly(1-butyl-3-vinylimidazole) bistrifluoromethylsulfonimide salt (polyionic liquid), 10 parts of Li 3 BCl 6 , 2 parts of PVDF are formed as raw materials, which are specifically prepared according to the following preparation process:

[0043] (1) LiCl and BCl with a molar ratio of 3:1 3 Dissolved in THF and dried to give Li 3 BCl 6 (solid electrolyte).

[0044](2) Slowly drop 1-bromobutane into 1-vinylimidazole, and react for 24 hours under dark conditions. The obtained reaction crude product is washed with ethyl acetate, and then the solvent is evaporated to obtain 1-butyl- 3-vinylimidazolium bromide (ionic liquid produ...

Embodiment 2

[0047] The all-solid-state lithium battery positive sheet provided in this embodiment includes a positive electrode current collector and a functional layer coated on the positive electrode current collector. In terms of 100 parts by weight, the functional layer consists of 80 parts of lithium cobaltate, 3 parts of carbon nanotubes, 2 Part PVDF, 5 parts poly(1-pentyl-3-vinylimidazole) bistrifluoromethylsulfonimide salt, 10 parts Li 3 AlCl 6 It is formed as a raw material, and it is specifically prepared according to the following preparation process:

[0048] (1) LiCl and AlCl with a molar ratio of 3:1 3 Dissolved in water and dried to give Li 3 AlCl 6 .

[0049] (2) Synthesize solid poly(1-pentyl-3-vinylimidazole) bistrifluoromethanesulfonimide salt with reference to the method of step (2) in Example 1, specifically, the difference from Example 1 is that : 1-bromopentane was used to replace 1-bromobutane, and 4 wt% azobisisobutyronitrile was used to initiate polymerizati...

Embodiment 3

[0052] The all-solid-state lithium battery positive electrode sheet provided in this embodiment includes a positive electrode current collector and a functional layer coated on the positive electrode current collector. In terms of 100 parts by weight, the functional layer consists of 80 parts of lithium cobaltate, 4 parts of carbon nanotubes, 2 Part PVDF, 6 parts poly(1-hexyl-3-vinylimidazole) bistrifluoromethylsulfonimide salt, 8 parts Li 3 AlCl 6 It is formed as a raw material, and it is specifically prepared according to the following preparation process:

[0053] (1) LiCl and AlCl with a molar ratio of 3:1 3 Dissolved in water and dried to give Li 3 AlCl 6 .

[0054] (2) Synthesize solid poly(1-hexyl-3-vinylimidazole) bis-trifluoromethanesulfonimide salt with reference to the method of step (2) in Example 1, specifically, the difference from Example 1 is: Using 1-bromohexane instead of 1-bromobutane, 4 wt% azobisisobutyronitrile was used to initiate polymerization.

...

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Abstract

The invention provides an all-solid-state lithium battery positive plate, a preparation method thereof and an all-solid-state lithium battery. The all-solid-state lithium battery positive plate comprises a positive current collector and a functional layer coated on the positive current collector, and the raw materials of the functional layer comprise a lithium-containing active material, a conductive agent, a solid electrolyte and a polyion liquid. The all-solid-state lithium battery positive plate provided by the invention has the characteristics of relatively high ionic conductivity and thelike, and the all-solid-state lithium battery formed by adopting the positive plate has the excellent performances of relatively high ionic conductivity, relatively low impedance, relatively high discharge capacity and the like.

Description

technical field [0001] The invention relates to the field of lithium-ion batteries, in particular to an all-solid-state lithium battery positive plate, a preparation method thereof, and an all-solid-state lithium battery. Background technique [0002] In recent years, as the demand for energy continues to grow, environmental pollution problems such as the greenhouse effect have become increasingly serious. Therefore, it is urgent to develop some new energy sources and related equipment and devices to alleviate or solve energy problems. Since its birth, lithium-ion batteries have been widely used in digital 3C, electric vehicles and even large-scale energy storage power stations due to their relatively high energy density, long cycle life, high cell voltage, and environmental friendliness. [0003] Lithium-ion batteries can be divided into liquid lithium-ion batteries and solid-state lithium-ion batteries. Among them, the organic electrolyte used in liquid lithium-ion batteri...

Claims

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Application Information

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IPC IPC(8): H01M4/131H01M4/1391H01M10/0525H01M10/0562H01M10/42
CPCH01M4/131H01M4/1391H01M10/0525H01M10/0562H01M10/4235H01M2300/0068Y02E60/10
Inventor 陈锡龙赵伟李素丽李俊义徐延铭
Owner ZHUHAI COSMX BATTERY CO LTD
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