A Flame-Retardant Cyclophosphazene as an Electrolyte Component for Si-Graphite Anodes for Lithium-Ion Batteries.

ABSTRACT: Silicon-graphite anodes offer a practical route to increase the energy density of lithium-ion batteries (LIBs), but their widespread adoption is hampered by cyclic instability due to huge volume changes of silicon during lithiation/delithiation process. Another fallout of LIBs capacity gain is growing safety concerns due to fire risks, associated with the uncontrolled release of chemical energy. Herein, we test a hexakis(fluoroethoxy)phosphazene (HFEPN) as a multifunctional electrolyte additive designed to mitigate both issues. The flammability of HFEPN-containing electrolytes was evaluated using a self-extinguishing time test, while the electrochemical performance was assessed in Si/C composite||NMC pouch cells under a progressively accelerated cycling protocol. It is shown that the addit

SUBMITTER: Vlasova Y 

PROVIDER: S-EPMC12785324 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature