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DOE OSTI · 1962344

Pushing Lithium–Sulfur Batteries towards Practical Working Conditions through a Cathode–Electrolyte Synergy

Zhao, Chen·Daali, Amine·Hwang, Inhui·Li, Tianyi·Huang, Xingkang·Robertson, David·Yang, Zhenzhen·Trask, Steve·Xu, Wenqian·Sun, Cheng‐Jun·Xu, Gui‐Liang·Amine, Khalil
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Abstract

The commercialization of lithium-sulfur (Li-S) batteries is still hindered by the unsatisfactory cell performance under practical working conditions, which is mainly caused by the sluggish cathode redox kinetics, severe polysulfide shuttling, and poor Li striping/platting reversibility. We reported an effective strategy by combining Se-doped S hosted in an ordered macroporous framework with highly fluorinated ether (HFE)-based electrolyte to simultaneously address the aforementioned issues in both cathode and anode. A reversible and stable high areal capacity of > 5.4 mAh cm -2 with high coulombic efficiency > 99.2% can be achieved under high areal Se/S loading (5.8 mg cm -2 ), while the underlying mechanism was further revealed through synchrotron X-ray probes and Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS). The practical application potential was further evaluated at low (0 °C) and high (55 °C) temperatures under high areal Se/S loading (> 5.0 mg cm -2 ) and thin Li metal (40 µm).

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25 ENERGY STORAGELi metalLi-S batterieshighly fluorinated electrolytepouch cellssolid-electrolyte interphase

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Zhao, Chen, Daali, Amine, Hwang, Inhui, Li, Tianyi, Huang, Xingkang, Robertson, David, Yang, Zhenzhen, Trask, Steve, Xu, Wenqian, Sun, Cheng‐Jun, Xu, Gui‐Liang, Amine, Khalil. 2022-04-24. Pushing Lithium–Sulfur Batteries towards Practical Working Conditions through a Cathode–Electrolyte Synergy. https://doi.org/10.1002/anie.202203466

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