[Chinese Academy of Sciences: Breakthrough in low-temperature lithium-ion capacitor electrolyte, energy density reaches 8.9 times that of traditional electrolyte] September 9th, lithium-ion capacitors have important application potential in low-temperature and high-power energy storage scenarios. Recently, Ma Yanwei’s team, a researcher at the Institute of Electrical Engineering of the Chinese Academy of Sciences, proposed a design strategy of “solvent shielding electrolyte”. The team used γ-valerolactone (GVL) with medium polarity, low melting point and moderate coordination ability as the main solvent, lithium difluoroxalate borate (LiDFOB) as the functional lithium salt, and introduced weakly coordinated ethyl acetate (EA) as the solvation adjustment component to weaken the wrapping and shielding effect of the solvent on lithium ions, promote the participation of anions to build a local solvation structure, and form a weakly bound, anion-participating solvation deshielding environment. Research shows that all-carbon lithium-ion capacitors prepared using this solvation shielding electrolyte still maintain excellent energy output performance at -40°C. The energy density based on the mass of the electrode material reaches 106.8Wh/kg, which is 8.9 times that of traditional carbonate-based electrolytes. This research breaks through the bottleneck of slow interfacial reaction kinetics caused by strong solvation shielding in low-temperature lithium-ion capacitors, and provides a new solution for the development of low-temperature, high-energy, and high-stability lithium-ion capacitors.