Halocarbon fluorinated esters氟化酯  provide unique benefits not available in conventional non-fluorinated esters:

Performance over a wider temperature range (enabling lower temperature performance)
Improved capacity retention
Enhanced oxidative stability, allowing use at high voltage ranges (4.2V-5.0V)
Some fluorinated esters can reduce flammability
Improved solubility with certain lithium salts (eg. LiBOB)