Electrode Edge Sliding Controller to Suppress Lithium Precipitation
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Solution Overview
Problem
Existing rechargeable lithium batteries face challenges in preventing lithium precipitation due to the sliding phenomenon of electrodes, which limits capacity and requires additional processing steps that increase cost and time.
Innovation Solution
The introduction of an electrode with a sliding controller on its edge area, featuring a compound with a contact angle of about 30° to 140°, which acts as a physical barrier to reduce or suppress the sliding phenomenon without substantial deterioration of processability or material quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional processing steps are introduced to prevent lithium precipitation, then lithium precipitation is reduced, but manufacturing complexity and cost increase
Solution Approach 1:
The sliding controller is formed on the edge area of the electrode current collector before the electrode active material layer is applied. This preliminary action prevents the sliding phenomenon from occurring in the first place, eliminating the need for subsequent corrective processing steps and reducing manufacturing complexity while maintaining reliability.
2Reliability
If the sliding phenomenon is suppressed, then lithium precipitation is reduced, but processability may deteriorate
Solution Approach 1:
The sliding controller is applied only to the edge area of the electrode current collector rather than the entire surface. This localized treatment suppresses the sliding phenomenon at critical edges while maintaining the processability and material properties of the central electrode area, avoiding deterioration of ease of manufacture.
3Reliability
If the sliding phenomenon is suppressed, then lithium precipitation is reduced, but material quality may deteriorate
Solution Approach 1:
The sliding controller is confined to the edge area of the electrode current collector, leaving the central area where the electrode active material layer is formed unaffected. This ensures that material quality and manufacturing precision in the critical electrode formation area are maintained while still achieving sliding suppression at the edges.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively reduces lithium precipitation, improves the lifecycle characteristics of rechargeable lithium batteries, and maintains the material and process quality, thereby enhancing battery performance and efficiency.
Implementation Method 1
the sliding controller includes a compound having a contact angle of about 30° to about 140°
Data Source
AI summary
Disclosed are an electrode, a preparation method thereof, and a rechargeable lithium battery including the electrode, the electrode including an electrode current collector, and a sliding controller located on an edge area of the electrode current collector, wherein the sliding controller includes a compound having a contact angle of about 30° to about 140°.