PNNL

Abstract

High-capacity Ni-rich cathode such as LiNi0.8Mn0.1Co0.1O2 (NMC811) has a great potential to enable high energy lithium-ion batteries (LIBs)for long-range electrical vehicles. But the large-scale application of NMC811 is still challenging. While many published papers on NMC811 focus on materials modification, moisture sensitivity of NMC811 and its implication in storage and large-scale electrode coating are not well explored, not mentioning how to overcome those challenges for industry application. This work discusses the key parameters impacting the rheological properties of NMC811 slurries and their correlations to the properties of dried electrodes. Effective solutions are proposed to address the gelation issue of NMC811 slurry during large-scale coating to hopefully inspire more effective and practical approaches to tackle the grand challenges in electrochemical energy storage.