From electrode saturation to structural collapse: unraveling the rollover failure in a lithium-rich manganese/graphite pouch cell at elevated temperature

Key Points

• This research aims to uncover the failure mechanisms in lithium-rich batteries operating under high temperatures.
• Investigated failure mechanisms in medium-voltage lithium-rich batteries
• Analyzed the impact of electrode saturation on Li plating
• Examined the interactions between transition metals in the cells
• Identified electrode saturation as a trigger for Li plating
• Revealed degradation cascade linked to transition-metal crosstalk
• Documented catastrophic capacity rollover in high-temperature conditions