Air-Stable Li_2S Cathode for Quasi-Solid-State Anode-Free Batteries with High Volumetric Energy

Xiangyu Meng; Yuzhao Liu; Le YuJieshan QiuZhiyu Wang

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Air-Stable Li_2S Cathode for Quasi-Solid-State Anode-Free Batteries with High Volumetric Energy

机译：Air-Stable Li_2S Cathode for Quasi-Solid-State Anode-Free Batteries with High Volumetric Energy

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Anode-free batteries can maximize the energy density but their developmentis hindered by a lack of Li-rich cathodes for compensating the irreversible Liloss. Li_2S cathode is particularly appealing to this desire due to 2.6-4.7 foldsmore Li content and 4.2-6.8 times higher capacity than conventional intercalationcathodes. But its practical application is hindered by poor stability againstmoisture attacking in the air. Herein, a facile expendable polymer sheathingstrategy toward air-stable Li_2S cathodes with high capacities for developinghigh-performance quasi-solid-state anode-free batteries without risk of cellleakage is reported. Tight protection by dense polymer barrier dramaticallyprolongs the lifetime of Li_2S cathode by 2,000 times at least in the air. Such airstableLi_2S cathode allows for high compatibility of anode-free battery productionwith commercial schemes. More attractively, the polymer protective layercan in situ transform to multifunctional gel polymer electrolyte for releasingionic pathways and enhancing cell performance by inhibiting LiPS loss andsmoothing Li plating. With air-stable Li_2S cathode, the quasi-solid-state anodefreecells are assembled in ambient environment to deliver superb volumetricenergy density of 1093 Wh L~(?1). This study may shed new light to push thecommercialization of high-energy and reliable anode-free batteries forward.

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来源
《Advanced functional materials》 |2023年第11期|2211062.1-2211062.8|共8页
作者
Xiangyu Meng; Yuzhao Liu; Le YuJieshan QiuZhiyu Wang;
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作者单位

State Key Lab of Fine Chemicals, Liaoning Key Lab for Energy Materialsand Chemical EngineeringPSU-DUT Joint Center for Energy ResearchDalian University of TechnologyDalian 116024, China;

College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029, China;

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正文语种英语
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air stability; anode-free batteries; Li_2S cathodes; quasi-solid-state cells; volumetric energy;

Air-Stable Li_2S Cathode for Quasi-Solid-State Anode-Free Batteries with High Volumetric Energy

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