Fluoro-organosulfur catholytes to boost lithium primary battery energy
نویسندگان
چکیده
Discovery of new electrochemical redox motifs is essential to expand the design landscape for energy-dense batteries. We report a family fluorinated reactants based on pentafluorosulfanyl arenes ( R-Ph-SF 5 ) that allow high electron-transfer numbers (up 8-e − /reactant) by exploiting multiple coupled processes, including extensive S–F bond breaking, yielding capacities 861 mAh·g reactant −1 and voltages up ∼2.9 V when used as catholytes in primary Li cells. At cell level, gravimetric energies 1,085 Wh·kg are attained at W·kg moderate temperatures 50 °C, with 853 delivered >100 , exceeding all leading batteries electrode + electrolyte (substack) mass. Voltage compatibility carbon monofluoride (CF x conversion cathodes further enabled investigation hybrid battery containing both catholyte cathode. The cells reach extraordinarily active mass loading (∼80%) energy (1,195 ), allowing significant boosting substack Li−CF least 20% while exhibiting good shelf life safety characteristics.
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences of the United States of America
سال: 2022
ISSN: ['1091-6490', '0027-8424']
DOI: https://doi.org/10.1073/pnas.2121440119