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A family of new lithium polysulfidophosphate (LPSP) compounds enables stable cycling of all-solid-state lithium-sulfur (Li-S) batteries with long lifespans.1 Li-S batteries have a high theoretical energy density of 2600 Wh/kg, which is about 5 times higher than that of the state-of-the-art lithium-ion batteries. Conventional Li-S batteries use liquid electrolytes, which lead to an intrinsic short lifespan of the batteries because of the loss of dissolved sulfur through the polysulfide shuttle phenomenon. The use of a solid electrolyte can efficiently prevent the polysulfide shuttle, thus achieving longevity of battery cycle-life. Nevertheless, an all-solid-state Li-S battery is difficult to cycle because the sulfur cathode is a poor ionic conductor. This research introduces the first family of sulfur-rich materials for the sulfur cathode that has a superionic conductivity for Li-ions. The excellent cyclability demonstrated in this research is attributed to the high ionic conductivity of LPSP, which is 107 times higher than Li2S, the most conductive species in conventional sulfur cathodes. Reference: “Lithium Polysulfidophosphates: A Family of Lithium-Conducting Sulfur-Rich Compounds for Lithium-Sulfur Batteries” Z. Lin (CNMS, ORNL), Z. Liu (CNMS, ORNL), W. Fu (CNMS, ORNL) N.J. Dudney (MSTD, ORNL), C. Liang (CNMS, ORNL)
Angewandte Chemie-International Edition, DOI: 10.1002/anie.201300680 and 10.1002/ange.201300680 Acknowledgment of Support:
This research was sponsored by U.S. Department of Energy (DOE)/Energy Efficiency and Renewable Energy (EERE) through Vehicle Technologies Office. The investigation of the ionic conductivity of these new compounds was supported by the Division of Materials Science and Engineering, Office of Basic
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Energy Sciences U.S. Department of Energy (DOE). The synthesis and characterization was conducted at the Center for Nanophase Materials Sciences, which is sponsored at Oak Ridge National Laboratory by the Division of Scientific User Facilities, U.S. DOE.
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A family of new lithium polysulfidophosphate (LPSP) compounds enables stable cycling of all-solid-state lithium-sulfur (Li-S) batteries with long lifespans.1 Li-S batteries have a high theoretical energy density of 2600 Wh/kg, which is about 5 times higher than that of the state-of-the-art lithium-ion batteries. Conventional Li-S batteries use liquid electrolytes, which lead to an intrinsic short lifespan of the batteries because of the loss of dissolved sulfur through the polysulfide shuttle phenomenon. The use of a solid electrolyte can efficiently prevent the polysulfide shuttle, thus achieving longevity of battery cycle-life. Nevertheless, an all-solid-state Li-S battery is difficult to cycle because the sulfur cathode is a poor ionic conductor. This research introduces the first family of sulfur-rich materials for the sulfur cathode that has a superionic conductivity for Li-ions. The excellent cyclability demonstrated in this research is attributed to the high ionic conductivity of LPSP, which is 107 times higher than Li2S, the most conductive species in conventional sulfur cathodes. Reference: “Lithium Polysulfidophosphates: A Family of Lithium-Conducting Sulfur-Rich Compounds for Lithium-Sulfur Batteries” Z. Lin (CNMS, ORNL), Z. Liu (CNMS, ORNL), W. Fu (CNMS, ORNL) N.J. Dudney (MSTD, ORNL), C. Liang (CNMS, ORNL)
Angewandte Chemie-International Edition, DOI: 10.1002/anie.201300680 and 10.1002/ange.201300680 Acknowledgment of Support:
This research was sponsored by U.S. Department of Energy (DOE)/Energy Efficiency and Renewable Energy (EERE) through Vehicle Technologies Office. The investigation of the ionic conductivity of these new compounds was supported by the Division of Materials Science and Engineering, Office of Basic
1
Energy Sciences U.S. Department of Energy (DOE). The synthesis and characterization was conducted at the Center for Nanophase Materials Sciences, which is sponsored at Oak Ridge National Laboratory by the Division of Scientific User Facilities, U.S. DOE.
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