Electrode plate and preparation method thereof, battery and power utilization device
The preparation of electrode sheets with gradient porosity through SEL printing technology solves the problem that the existing battery electrode sheet structure cannot provide fast lithium ions transmission, and achieves the fast charging and discharging of the battery and high-rate performance.
CN119650593APending Publication Date: 2025-03-18CHINA FAW CO LTD +1
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Patent Information
- Application Number
- CN202411418664.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-03-18
AI Technical Summary
Technical Problem
The existing battery pole structure cannot provide a fast transmission channel of lithium ions, resulting in low charging efficiency and battery polarization, which in turn causes battery failure.
Method used
Electrode sheets with gradient porosity are prepared through SEL printing technology, and the channels for ion transmission within the active material layer are smoother, providing a fast channel for the transmission of active ions such as lithium ions.
Benefits of technology
The battery's rate performance is improved, and the battery's fast charging and discharge is achieved. The capacity retention rate is still good under 10C discharge conditions.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to an electrode plate and a preparation method thereof, a battery and an electric device. The preparation method of the electrode plate comprises the following steps: mixing an active material, a conductive agent and a binder with a solvent to obtain active slurry; and performing multi-layer printing on the active slurry on at least one side of a current collector by adopting a slurry extrusion stacking technology to form a plurality of active material layers with gradient porosity so as to prepare the electrode plate, the printing porosity of the plurality of active material layers is gradually increased in the direction from the current collector to the active material layers. The electrode plate with gradient porosity is prepared through the SEL printing technology, a channel for ion transmission in the active material layer of the electrode plate is smoother, a rapid channel is provided for transmission of active ions such as lithium ions, and rapid transmission of the active ions at a high rate is supported. When the electrode plate is applied to batteries such as lithium ion batteries, the rate capability of the batteries can be improved, and rapid charging and discharging of the batteries can be realized.
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