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Common issues encountered when using NOVONIX UHPC systems and how to troubleshoot them.

Twenty seven LiCoO2/graphite wound prismatic cells containing a variety of electrolyte additives as well as high or low surface area LiCoO2 were studied during high temperature storage using an automated storage system.

The High Precision Charger at Dalhousie University can be used to accurately measure the Coulombic Efficiency (CE) and the charge and discharge capacity endpoint slippages per cycle (Δd and Δc, respectively) of Li-ion full cells and Li/electrode half cells.

The charge and discharge endpoint capacities as well as the coulombic efficiency of Li/graphite coin cells have been examined using the high precision charger at Dalhousie University.

Three nominally identical cohorts of NMC/graphite automotive Li-ion cells aged zero, one, and two years were obtained from an automotive Li-ion cell producer. The aged cells were stored at 50% state of charge at room temperature without cycling.

In this study, coulombic efficiency versus charging rate was measured at different temperatures and for two cell types. Small changes to the coulombic efficiency during cycling resulting from small amounts of lithium plating during the charging process were detected using a high precision charger.

Determining the lifetime of Li-ion cells destined for decade-long applications is very challenging. Li-ion cells for long life applications fail because of parasitic reactions, occurring at tiny rates, between the electrolyte and the charged electrodes that are occurring all the time.

A non-destructive technique for physically detecting the growth of the solid electrolyte interphase (SEI) during cycling of Li-ion pouch cells is presented.

Part I of this 2-part series investigates physical and electrochemical differences between the graphite materials of interest here, as well as room temperature cycling to probe improvements in capacity retention.