Information Dense and Industry Scalable Accelerated Formation

Bespoke formation of batteries offers improved lifetime and performance but is generally associated with long processing times, high cost, and large floorspace. Facile strategies like heating or increasing the formation current, as well as current alterations during formation have their limits in speed up and efficiency. We present pulsed formation on graphitic anode full cells as an accelerated formation strategy and investigate its influence on various quality parameters. Optimized pulsed charging is demonstrated herein to reduce the formation time by more than 50% while maintaining or improving all other cell quality parameters including discharge capacity. The newly discovered protocol is scaled up to 25 Ah prismatic cells in the plug‐in hybrid electric vehicle 1 (PHEV1) format that confirm the accelerated and improved pulsed formation strategy. We attribute the accelerated and improved formation to an apt balance of surface and bulk diffusion which results in thinner, more homogenous solid electrolyte interphases (SEIs). Dynamics of pulsed formation also allow for the extraction of new quality markers while formation is happening.