Aluminum Foam Sheet (T 0.1-1.0 mm, L 100mm * W 100mm) as Battery Cathode Current Collector, CBCCCAFOS

Aluminum foam is an advanced, three-dimensional (3D) porous current collector used primarily at the cathode of high-performance batteries. Aluminum foam acts as a "scaffold" with a 3D architecture that offers several structural advantages: (1) Typically its porosity can be up to 60-95%, allowing for deep infiltration of the active material slurry. (2) It provides significantly more contact points (extremely high surface area) between the current collector and the active materials (like LFP or NMC). (3) It shortens the path that electrons must travel to reach the current collector, lowering internal resistance.

Using aluminum foam instead of foil can lead to dramatic improvements in specific performance metrics: (1) Ultra-High Mass Loading: Because the foam is 3D, you can pack much more active material into a single layer. (2) Superior Rate Capability: At high C-rates (fast discharge), foil-based batteries often suffer from "diffusion bottlenecks." The 3D foam network ensures electrons are collected from the entire volume of the electrode simultaneously, maintaining capacity even during rapid discharge. (3) Thermal Management: Aluminum’s high thermal conductivity combined with the foam's high surface area helps dissipate heat more effectively during fast charging, reducing the risk of thermal runaway. (4) Mechanical Stability: The foam "locks" the active material in place, preventing the delamination (peeling) that often occurs when thick electrodes are bent or cycled repeatedly.