Early-Stage Sustainability Assessment of Carbon-Nanotubes-Enabled Renewable Energy Technologies using Ex-Ante LCA and Sound Material-Cycle Index

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One target application of carbon nanotubes (CNT) is the next-generation Lithium-Sulfur (LiS) batteries. The self-supporting structure and current-conducting property of CNTs enable the innovation of CNT-sulfur-cathode. This will improve the battery performance, i.e., weight-less, charge-faster, and higher energy capacity, and potentially reduce the environmental loads of battery production.This year we conducted a prospective LCA of LiS battery based on our lab experiments and anticipated industrialized processes. We found that the Li-S battery can achieve 60 kg CO2e per kWh battery capacity, nearly 50% lower than an advanced NMC811. It is not only contributed by the change of cathode materials but also by the change of cathode processes.