This technology involves placing a siloxane-based or fluorine-based elastic polymer film between the bottom of the coin cell case and the lithium metal electrode. This design evenly distributes physical pressure within the cell and accommodates volume changes in the electrode.
During coin cell manufacturing, uneven internal pressure often occurs due to deformation of the metal casing, misalignment of components, and electrode volume changes. These pressure variations promote the non-uniform growth of lithium dendrites, leading to performance inconsistencies between cells and reduced reproducibility.
This technology utilizes a siloxane-based or fluorine-based elastic polymer film with an elastic modulus of 0.5–5 MPa inserted at the base of the coin cell. Electrical conductivity is maintained by forming metal strips on the film surface, and interfacial adhesion can be enhanced through plasma treatment if necessary. This solution is ideal for standard half-cell testing in lithium metal anode research labs and battery evaluation facilities, as it reduces data variance between cells and improves the reliability of material comparisons.
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