Fig. 6

Electrochemical performance with lithium thiophosphate (LPS) added as an electrochemically “switched-on” redox mediator generator. a Cycle performance of 70% Li₂S-10% LPS at 4 mg cm⁻² (\(4 \,{\rm{\mu}}{\mathrm{{L}}}\,{{\mathrm{mg}}^{−1}_{{{\mathrm{{Li}}}_{2}} {\mathrm{S}}}}\)) and 6 mg cm⁻² (\( 7\,{\rm{\mu}}{\mathrm{{L}}}\,{\mathrm{mg}}^{−1}_{{{\rm{{Li}}}_{2}}{\rm{S}}}\)), b cycle performance and c charging voltage profile of 70% Li₂S-10% LPS electrode at 1.5 \( {\mathrm{{mg}}}_{{{\mathrm{{Li}}}_{2}}{\mathrm{{S}}}}\) at various electrolyte content (4–2 µL \({\mathrm{{mg}}}^{−1} {\hbox{)}}{\,}_{{{\rm{{Li}}}_{2}} {\rm{S}}}\), and d–f discharge voltage profile of 70% Li₂S-10% LPS electrode at 1.5 \({\mathrm{{mg}}}^{−1}_{{{\rm{{Li}}}_{2}}{\rm{S}}}\) cm⁻² at 4, 3, and 2 µL \({\mathrm{{mg}}}^{−1}_{{{\rm{{Li}}}_{2}}{\rm{S}}}\), respectively