biostudies-literatureHyun GIntelligence Advanced Research Projects ActivityNational Science Foundatione2411598https://www.ebi.ac.uk/biostudies/studies/S-EPMC11809408biostudies-literatureUnknown12(6)Rechargeable Li-SO<sub>2</sub> batteries offer low-cost, high-energy density benefits and can leverage manufacturing processes for the existing primary version at a commercial scale. However, they have so far only been demonstrated in an "open-system" with continuous gas supply, preventing practical application. Here, the utilization and reversibility of SO<sub>2</sub> along with the lithium stability are addressed, all essential for long-life, high-energy batteries. The study discovers that high SO<sub>2</sub> utilization is achievable only from SO<sub>2</sub> dissolved in electrolytes between the lithium anode and carbon cathode. This results from a unique osmosis phenomenon where SO<sub>2</sub> consumption increases salt concentration, driving the influx of organic solvents rather than Advanced science (Weinheim, Baden-Wurttemberg, Germany)Development of a Sealed Rechargeable Li-SO<sub>2</sub> Battery.PMC11809408ECCS-15421482021-21060200009Liu HLee MHWang SLiu PPetrova VHui ZHyun GfalseDevelopment of a Sealed Rechargeable Li-SO<sub>2</sub> Battery.Rechargeable Li-SO<sub>2</sub> batteries offer low-cost, high-energy density benefits and can leverage manufacturing processes for the existing primary version at a commercial scale. However, they have so far only been demonstrated in an "open-system" with continuous gas supply, preventing practical application. Here, the utilization and reversibility of SO<sub>2</sub> along with the lithium stability are addressed, all essential for long-life, high-energy batteries. The study discovers that high SO<sub>2</sub> utilization is achievable only from SO<sub>2</sub> dissolved in electrolytes between the lithium anode and carbon cathode. This results from a unique osmosis phenomenon where SO<sub>2</sub> consumption increases salt concentration, driving the influx of organic solvents rather than 2025-01-01T00:00:00Z2025 Feb2025-04-25T17:57:46.442Z2025-04-25T17:57:46.442ZS-EPMC118094083968671910.1002/advs.202411598