Understanding the Role of Borohydride Doping in Electrochemical Stability of Argyrodite Li₆PS₅Cl Solid-State Electrolyte.

ABSTRACT: This work elucidates the mechanism by which lithium borohydride (LiBH₄) doping into argyrodite-type Li₆PS₅Cl (LBH-LPSCl) solid-state electrolyte (SSE) enhances electrochemical stability. State-of-the-art electrochemical performance is achieved with 5 wt% borohydride. Symmetric cells achieve critical current density (CCD) of 7.3 mA cm^-2, versus 2.6 mA cm^-2 for baseline-LPSCl. All solid-state batteries (ASSBs) employing lithium metal and NMC811 cathode are stable over 400 cycles at 0.5C, with capacity retention of 83%. An anode-free ASSB (AF-ASSB) is stable over 600 cycles, with capacity loss of 0.04% per cycle. 5LBH-LPSCl allows for enhanced low temperature operation, down to -14 °C. Yet the difference in electrolytes' bulk microstructu

SUBMITTER: Wang Y 

PROVIDER: S-EPMC12510284 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature