Development of quasi-solid-state anode-free high-energy lithium sulfide-based batteries

Yuzhao Liu, Xiangyu Meng, Zhiyu Wang () and Jieshan Qiu
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Yuzhao Liu: Dalian University of Technology
Xiangyu Meng: Dalian University of Technology
Zhiyu Wang: Dalian University of Technology
Jieshan Qiu: Dalian University of Technology

Nature Communications, 2022, vol. 13, issue 1, 1-11

Abstract: Abstract Anode-free lithium batteries without lithium metal excess are a practical option to maximize the energy content beyond the conventional design of Li-ion and Li metal batteries. However, their performance and reliability are still limited by using low-capacity oxygen-releasing intercalation cathodes and flammable liquid electrolytes. Herein, we propose quasi-solid-state anode-free batteries containing lithium sulfide-based cathodes and non-flammable polymeric gel electrolytes. Such batteries exhibit an energy density of 1323 Wh L−1 at the pouch cell level. Moreover, the lithium sulfide-based anode-free cell chemistry endows intrinsic safety thanks to a lack of uncontrolled exothermic reactions of reactive oxygen and excess Li inventory. Furthermore, the non-flammable gel electrolyte, developed from MXene-doped fluorinated polymer, inhibits polysulfide shuttling, hinders Li dendrite formation and further secures cell safety. Finally, we demonstrate the improved cell safety against mechanical, electrical and thermal abuses.

Date: 2022
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DOI: 10.1038/s41467-022-32031-7

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