Addionics 3D current collector design targets major lithium-ion battery weakness

Battery architecture developer Addionics has introduced a low-temperature architecture designed to address performance losses in lithium-ion cells during cold weather. The design utilizes the company’s Smart 3D Porous Current Collectors to modify how ions, electrons, and thermal energy move inside the battery.

Traditional lithium-ion batteries rely on flat metal foil current collectors that restrict ion movement to horizontal paths across individual electrode layers. In freezing conditions, this configuration reduces usable energy while increasing the power consumed by onboard thermal management systems to warm the pack.

The 3D current collector architecture replaces conventional dense foils with an engineered porous structure. This permits liquid electrolyte and lithium ions to move vertically across the electrode stack, establishing additional access pathways that reduce diffusion distances and distribute electrochemical activity across a larger cell volume.

By improving internal transport dynamics, the architecture mitigates capacity loss and maintains faster charging capability in low temperatures. The company states that the design integrates into existing roll-to-roll manufacturing lines and works across conventional and emerging battery chemistries.

The commercial scope of the technology extends across electric vehicles, heavy commercial trucks, defense drones, and aerospace hardware, where low-temperature operational limits remain a key performance bottleneck.