A Battery That Last Twice as Long A SolidEnergy startup has developed a lithium-ion battery that stores far more energy. Energy storage lies in swapping the conventional electrode material”graphite”for a thin sheet of lithium-metal foil which can store more lithium ions. The design consists of an ultra-thin metal anode made of thin lithium on copper which enables ultra-high energy density and high-efficiency electrolyte which enables high current density at room temperature. Solid Polymer Ionic Liquid (SPIL) electrolyte enables the ultra-thin lithium metal anode and improves the cell-level energy density by 50% compared to graphite anodes and 30% compared to silicon-composite anodes.Batteries are safe non-flammable and non-volatile and can operate at elevated temperatures. It can be manufactured using existing Li-ion manufacturing facility leveraging mature infrastructure. The company says its prototype can be recharged 300 times while retaining 80% of its original storage capacity”closer to what you™d need in portable electronics.