Cathode

Slurry-based Process

The spinel-type LiNi0.5Mn1.5O4 (LNMO) cathode material has attracted great interest due to its high operating voltage and Co-free chemistry. However, severe capacity degradation and poor interphase stability have thus far impeded its practical application. A dry coating process, i.e., casting the cathode without the use of a solvent-based slurry, was demonstrated to enable high-loading electrodes (up to 9.5 mAh/cm2) having a better long-term cycling than slurry-based electrodes. The performance improvement was explained in terms of diminished parasitic reactions with the electrolyte, a highly distributed and interconnected electronic percolation network, and robust mechanical properties. Electrodes with a loading of 3 mAh/cm2 showed an average coulombic efficiency of 99.96% after 1000 cycles at a C/3 rate. The dry electrode coating method is a cost-effective and sustainable manufacturing solution for high-loading LNMO cathodes (up to 9.5 mAh/cm2) with a long cycle life. 148

Research: Cathode

Volta Foundation

Source: Yao, Chouchane, Li, Bai, Liu, Li, Chen. Sayahpour, Shimizu, Raghavendran, Chen, Tan, Sreenarayanan, Waters, Sichler, Gould, Kountz, Lipomi, Zhang, and Meng

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