LOWER FLAMMABILITY ELECTROLYTE COMPOSITIONS

Electrolyte compositions comprising electrolyte additives and/or solvents for reduction of thermal propagation in lithium-ion batteries are disclosed. Energy storage devices comprising the electrolyte compositions comprise a first electrode and a second electrode, wherein at least one of the first electrode and the second electrode may be a Si-based electrode, a separator between the first electrode and the second electrode, and the electrolyte composition.