Abstract
Conventional slurry-cast manufacturing of Lithium-ion battery (LIB) cathode containing active materials, conductive carbon, binders, and organic solvents is expensive and environmental unfriendly due to the long drying process (solvents evaporation). Here, we apply a new, completely dry powder process to manufacturing (LIB) cathodes which includes the use of multiple atmospheric plasma streams to activate cathodes particles for manufacturing high-density and thick LIB cathodes. In this presentation, we use Lithium iron phosphate (LFP) as an example to elaborate this drying process and discuss the effectiveness of the cold-plasma process on electrode manufacturing. During the cold-plasma process, LFP power together with a metallic binder (aluminum herein) were directly co-deposited on the current collector with a superb control of thickness. This presentation will discuss the effects of loading LFP thickness, particles size, and surface chemistry on the electrochemical properties and the cycling performance. XPS and in situ XRD analysis are also used here to better understand the LFP phase evolution and surface chemistry at different electrochemical states.
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