An ester electrolyte for lithium–sulfur batteries capable of ultra-low temperature cycling. Issue 64 (15th July 2020) - Cai, Guorui
Abstract : Li||SPAN batteries in the lithium bis(fluorosulfonyl)imide methyl propionate/fluoroethylene carbonate (LiFSI MP/FEC) electrolyte system can charge and discharge at −40 °C with over 78% room temperature capacity retention. Abstract : A novel lithium bis(fluorosulfonyl)imide in a methyl propionate/fluoroethylene carbonate (LiFSI MP/FEC) electrolyte was designed for high compatibility with the Li metal and sulfurized polyacrylonitrile (SPAN). The resulting Li||SPAN cells can charge and discharge at −20 °C and −40 °C with over 91% and 78% room temperature capacity retention.