Electrode plate and preparation method and application thereof

Abstract

The invention discloses an electrode plate as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing an electrode material plate: stirring an electrode material, a conductive agent, an adhesive, a dispersing agent and a pore-forming agent to obtain slurry, coating the surface of a current collector with the slurry, and conducting drying to obtain the electrode material plate; preparing an electrolyte solution: performing mechanical ball milling on the solid electrolyte to obtain electrolyte powder, and dissolving the electrolyte powder in an organic solvent to obtain the electrolyte solution; preparing the electrode plate:soaking the electrode material plate in the electrolyte solution, then conducting heating, drying and tabletting under the vacuum condition to obtain the electrode plate. The electrode plate of the solid-state lithium ion battery is prepared through the preparation method. The prepared electrode plate is applied to any one of a traditional liquid lithium battery, a polymer lithium battery, a mixed solid-liquid electrolyte lithium storage battery and a solid-state battery. The preparation method has theadvantages that the preparation process is low in cost, large-scale production is easy, and the prepared electrode plate has excellent electrochemical performance.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, more specifically, it relates to an electrode pole piece and its preparation method and application. Background technique [0002] Due to the advantages of high energy density, high working voltage, and no memory effect, lithium-ion batteries have been rapidly and widely used in daily portable electronic products, power batteries, and energy storage systems. Traditional lithium-ion batteries use organic electrolyte as the carrier of lithium ions, but when the temperature rises, a series of side reactions occur between the electrolyte and the materials in the battery system, which significantly increases the internal resistance of the battery and is accompanied by gas production, etc. Phenomenon, a serious threat to the safe use of the battery. In order to solve the above problems of traditional lithium-ion batteries, solid-state electrolytes are usually used as lithium-ion transpor...

AI Technical Summary

Problems solved by technology

Although solid-state batteries have significant advantages in safety and energy density, their development still faces some problems. In an all-solid-state system, because the solid-state electrolyte and electrode materials are in solid-solid contact, the interface resistance is large, resulting in a sharp drop in battery performance.

[0003] In order to alleviate the above problems, atomic layer deposition (ALD) is currently used to prepare modified solid electrolytes or dry mechanical ball milling of electrode material active materials, electrolytes, carbon materials, etc. The former deposition method is more expensive to prepare solid electrolytes, while the latter It is difficult to obtain a sample coated with electrolyte evenly through mechanical ball milling, so it is particularly important to find a preparation method that is low-cost, easy to scale up and has excellent electrochemical performance

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