High-Energy LiNiO₂ Li Metal Batteries Enabled by Hybrid Electrolyte Consisting of Ionic Liquid and Weakly Solvating Fluorinated Ether.

ABSTRACT: In pursuit of the highest possible energy density, researchers shift their focus to the ultimate anode material, lithium metal (Li⁰), and high-capacity cathode materials with high nickel content (Ni > 80%). The combination of these aggressive electrodes presents unprecedented challenges to the electrolyte. Here, we report a hybrid electrolyte consisting of a highly fluorinated ionic liquid and a weakly solvating fluorinated ether, whose hybridization structure enables the reversible operation of a battery chemistry based on Li⁰ and LiNiO₂ (Ni = 100%), delivering nearly theoretical capacity of the latter (up to 249 mAh g^-1) for >300 cycles with retention of 78.6% and in absence of unwanted morphological changes in both electrodes. Extensive charac

SUBMITTER: Liu Q 

PROVIDER: S-EPMC11633521 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature