Electrolyte Optimization for Anthraquinone-Based Slurry Batteries

AQ suspensions show strong potential as organic anodes for Li-ion slurry batteries. However, the influence of slurry electrolyte composition on the electrochemical behavior of AQ lacks systematic investigation. We explored the effects of different lithium salts and solvents in the electrolyte on the redox behavior of the AQ material electrode. An electrolyte (1 M LiTFSI dissolved in DME: DOL with a volume ratio of 1:1) optimized for AQ lithium slurry batteries exhibits a stable 2.3 V charge/discharge platform delivering a discharge specific capacity of 246.2 mAh g−1 at 1.25 A g−1 (approaching the theoretical value) with stable slurry reactor operation for over 47 h. This work establishes a structure-property relationship between electrolyte formulation and AQ electrode performance, offering a design principle for electrolyte selection in organic slurry-based battery systems.