Home Batteries Lithium-sulfur (Li-S) batteries may bring twice the energy at half the weight.... Lithium-sulfur (Li-S) batteries may bring twice the energy at half the weight. [Technical] 1 Jul 2019 | BatteriesElectric AircraftHeadline5 Recent advances in polysulfide mediation of lithium-sulfur batteries via facile cathode and electrolyte modification.