Manufacturing method for regenerated positive electrode
The method of pressing and lithium ion doping, optionally with organic solvent washing, addresses resistance and capacity issues in recycled lithium-ion battery positive electrodes, improving recovery efficiency.
JP2025154484AActive Publication Date: 2025-10-10HONDA MOTOR CO LTD
Patent Information
- Application Number
- JP2024057518
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2044-03-29
AI Technical Summary
Technical Problem
Existing methods for recycling lithium-ion secondary battery positive electrodes fail to recover increased resistance due to decreased adhesion of particles and capacity loss due to reduced lithium, as seen in Patent Documents 1 and 2.
Method used
A method involving pressing the positive electrode and doping it with lithium ions, optionally preceded by washing with an organic solvent, to restore adhesion and lithium content.
Benefits of technology
The method effectively recovers resistance and capacity losses in recycled positive electrodes, enhancing efficiency and reducing solvent use.
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Smart Images
Figure 2025154484000001_ABST
Abstract
To provide a manufacturing method for a regenerated positive electrode capable of recovering resistance increase due to reduced adhesion of positive electrode active material particles, etc., and recovering capacity reduction due to lithium depletion in a positive electrode.SOLUTION: A manufacturing method for a regenerated positive electrode in a used lithium-ion secondary battery including a laminate having a positive electrode, either a separator or a solid electrolyte layer, and a negative electrode, includes extracting the positive electrode from the laminate, pressing the extracted positive electrode, and doping lithium ions into the pressed positive electrode. The doping of lithium ions is performed by discharging in an electrolyte solution using a lithium electrode as a counter electrode.SELECTED DRAWING: Figure 3
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Citation Information
Patent Citations
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