Quantifying Galvanic Corrosion Kinetics across Battery Pack Busbar Terminations
Galvanic corrosion kinetics at battery busbar joints depend on potential offsets, area ratios, and moisture film thickness, requiring controlled plating barriers.
Thin Film Electrolyte
Meaning
Ionic conductor layers with a thickness measured in micrometers separate the anode and cathode in solid state batteries. Implementation of a thin film electrolyte enables the development of micro batteries with high energy density and flexible form factors. These materials are solid rather than liquid, which eliminates the risk of leakage and improves thermal safety.
They must possess high ionic conductivity while remaining electronically insulating.
Deposition Method
Sputtering or chemical vapor deposition allows for the precise application of the material onto a substrate. Because the thin film electrolyte must be defect free, the process occurs in clean room environments. This precision ensures that no short circuits occur between the electrode layers.
Solid State
Absence of flammable solvents makes the cell inherently more stable than traditional lithium ion designs. Since the thin film electrolyte acts as both the separator and the ion carrier, the overall volume of the battery is reduced. The solid interface prevents the growth of lithium dendrites that can cause internal shorts.
Cell Architecture
Stacked layers of active material and conductor create high voltage assemblies within a very small footprint. While a thin film electrolyte offers high safety, the total capacity is often limited by the thinness of the active electrode layers. These cells are frequently integrated directly onto silicon chips for powering sensors and medical devices.
Reliability is maintained through the mechanical strength of the solid interface which resists vibration and pressure better than liquid counterparts.