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Lithium ion solid-state battery positive electrode, preparation process thereof and lithium ion solid-state battery

A preparation process and technology for solid-state batteries, applied in electrode manufacturing, battery electrodes, electrode current collector coatings, etc., can solve the problems affecting the stability and uniformity of the coating layer, and the thickness of the coating layer is difficult to grasp. The effect of thinning, reducing requirements, increasing solids content

Active Publication Date: 2020-08-07
QINGTAO KUNSHAN ENERGY DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is also difficult to control the thickness of the coating layer when coating the solid electrolyte coating of the invention, thus affecting the stability and uniformity of the coating layer

Method used

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  • Lithium ion solid-state battery positive electrode, preparation process thereof and lithium ion solid-state battery
  • Lithium ion solid-state battery positive electrode, preparation process thereof and lithium ion solid-state battery
  • Lithium ion solid-state battery positive electrode, preparation process thereof and lithium ion solid-state battery

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Embodiment 1

[0060] The positive electrode of the lithium-ion solid-state battery of the present embodiment is prepared as follows:

[0061] 1) Coating a positive electrode active material layer consisting of 10wt% PTFE, 10wt% carbon fiber, and 80wt% nickel-cobalt lithium manganese oxide on the surface of the aluminum foil, and drying it;

[0062] 2) Dissolve 30wt% ammonium bicarbonate, 60wt% lithium lanthanum zirconium oxide, and 10wt% PTFE in NMP (slurry solid content 60wt%) to prepare a solid electrolyte coating solution, and set the coating thickness of the coating machine to 15 μm, the aluminum foil transmission rate is 2m / s, and the solid electrolyte coating solution is coated on the surface of the positive electrode active material layer;

[0063] 3) After the coating is completed, enter the heating area, the drying temperature is 110°C, and the residence time is 5min. After winding, it is dried in an oven at 105°C for 24h, and the dried electrode sheet is rolled and cut to obtain l...

Embodiment 2

[0069] The positive electrode of the lithium-ion solid-state battery of the present embodiment is prepared as follows:

[0070] 1) Coating a positive electrode active material layer consisting of 10wt% PTFE, 10wt% carbon fiber, and 80wt% nickel-cobalt lithium manganese oxide on the surface of the aluminum foil, and drying it;

[0071] 2) Dissolve 30wt% ammonium carbonate, 60wt% lithium lanthanum zirconium oxide, and 10wt% PTFE in NMP (slurry solid content 60wt%) to prepare a solid electrolyte coating solution, and set the coating thickness of the coating machine to 15 μm , the transmission rate of the aluminum foil is 2m / s, and the solid electrolyte coating solution is coated on the surface of the positive electrode active material layer;

[0072] 3) After the coating is completed, enter the heating area, the drying temperature is 105°C, and the residence time is 5min. After winding, it is dried in an oven at 105°C for 24h, and the dried electrode sheet is rolled and cut to obta...

Embodiment 3

[0078] The positive electrode of the lithium-ion solid-state battery of the present embodiment is prepared as follows:

[0079] 1) Coating a positive electrode active material layer consisting of 10wt% PTFE, 10wt% carbon fiber, and 80wt% nickel-cobalt lithium manganese oxide on the surface of the aluminum foil, and drying it;

[0080] 2) Dissolve 30wt% aluminum chloride, 60wt% lithium lanthanum zirconium oxide, and 10wt% PTFE in NMP (slurry solid content 60wt%) to prepare a solid electrolyte coating solution, and set the coating thickness of the coating machine to 15 μm, the aluminum foil transmission rate is 2m / s, and the solid electrolyte coating solution is coated on the surface of the positive electrode active material layer;

[0081] 3) After the coating is completed, enter the heating area, the drying temperature is 195°C, and the residence time is 20min. After winding, it is dried in an oven at 105°C for 24h, and the dried electrode sheet is rolled and cut to obtain lit...

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Abstract

The invention discloses a lithium ion solid-state battery positive electrode, a preparation process thereof and a lithium ion solid-state battery. The preparation process of the positive electrode ofthe lithium ion solid-state battery comprises the following steps S1, coating the surface of a positive electrode current collector with a positive electrode active substance layer, and carrying out drying; s2, coating the surface of the positive electrode active material layer with solid electrolyte coating slurry, wherein the solid electrolyte coating slurry comprises a substance which is in a solid state at normal temperature and forms gas at 60-200 DEG C; s3, carrying out heating and drying under the condition of 60-200 DEG C to obtain the solid electrolyte coating, and while heating, applying pressure to the surface of the positive electrode current collector on which the solid electrolyte coating is formed, and compacting to obtain the positive electrode of the lithium ion solid-state battery. The solid electrolyte coating of the positive electrode of the lithium ion solid-state battery is moderate in solid content and has good stability and uniformity, so that the prepared lithium ion solid-state battery has a good capacity retention ratio.

Description

technical field [0001] The invention belongs to the field of lithium-ion solid-state batteries, in particular to a positive electrode of a lithium-ion solid-state battery and a preparation process thereof, in particular to a lithium-ion solid-state battery prepared by preparing a positive electrode of a lithium-ion solid-state battery. Background technique [0002] All-solid lithium-ion batteries generally include three parts: positive electrode, negative electrode, and solid electrolyte. Among them, the positive electrode includes positive electrode active material, binder, and conductive agent; the negative electrode includes negative electrode active material, binder, conductive agent, or uses lithium metal as the negative electrode; The solid electrolyte includes a binder and an electrolyte material selected from oxide or sulfide solid electrolytes. [0003] In the prior art, it is advantageous to coat a layer of solid electrolyte layer on the surface of the electrode ac...

Claims

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Application Information

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IPC IPC(8): H01M4/04H01M4/13H01M4/139H01M10/0525H01M10/0562
CPCH01M4/0404H01M4/0407H01M4/0433H01M4/13H01M4/139H01M10/0525H01M10/0562H01M2004/028H01M2300/0068Y02E60/10
Inventor 冯玉川李峥何泓材杨帆
Owner QINGTAO KUNSHAN ENERGY DEV CO LTD
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