(103d) Replacement of Metal Current Collectors with Carbon Nanotube Fabrics

The global lithium-ion battery (LIB) market is poised for significant growth. Conventional current collectors, mainly composed of aluminum and copper foils, have remained unchanged since the inception of the first commercial lithium-ion battery. However, besides being critical materials, these current collectors contribute substantial weight to the electrodes (15-30%) without adding to the battery's capacity. Moreover, their production generates significant mining waste and emissions, highlighting the urgent need for sustainable alternatives.

I will describe the application of carbon nanotube fabrics (CNTf) as a replacement for copper and aluminum current collectors. CNTf possess properties that make them suitable for this role. Their semi-porous structure minimizes through-thickness electrical resistance in battery electrodes, while their axial alignment provides sufficient conductivity to extract current from large devices as effectively as metallic analogues. CNTf has the potential to significantly reduce the environmental impact of LIB production while enhancing their performance and sustainability.