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Minimizing carbon Content with Three-in-One Functionalized Nano Conductive Ceramics:Toward More Practical and Safer S Cathodes of Li-S Cells

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Energy & Environmental Materials 2023年第3期6卷 31-39页

作者： Ning Li Chang Sun Jianhui Zhu Shun Li Yanlong Wang Maowen Xu Changming Li Jian Jiang School of Materials and Energy and Chongqing Key Lab for Advanced Materials and Clean Energies of TechnologiesSouthwest UniversityChongqing 400715China School of Physical Science and Technology Southwest UniversityChongqing 400715China Key Laboratory of Chemical Lasers Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China College of Chemistry and Chemical Engineering Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Provinceand Key Laboratory of Functional Materials and Photoelectrochemistry of HaikouHainan Normal UniversityHaikou 571158China

Using porous carbon hosts in cathodes of Li-S cells can disperse S actives and offset their poor electrical ***,such reservoirs would in turn absorb excess electrolyte solvents to S-unfilled regions,causing the electrolyte overconsumption,specific energy decline,and even safety hazards for battery *** build better cathodes,we propose to substitute carbons by In-doped SnO_(2)(ITO)nano ceramics that own three-in-one functionalities:1)using conductive ITO enables minimizing the total carbon content to an extremely low mass ratio(~3%)in cathodes,elevating the electrode tap density and averting the electrolyte overuse;2)polar ITO nanoclusters can serve as robust anchors toward Li polysulfide(LiPS)by electrostatic adsorption or chemical bond interactions;3)they offer catalysis centers for liquid–solid phase conversions of S-based ***,such ceramics are intrinsically nonflammable,preventing S cathodes away from thermal runaway or *** merits entail our configured cathodes with high tap density(1.54 g cm^(−3)),less electrolyte usage,good security for flame retardance,and decent Li-storage *** lean and LiNO_(3)-free electrolyte,packed full cells exhibit excellent redox kinetics,suppressed LiPS shuttling,and excellent *** may trigger great research enthusiasm in rational design of low-carbon and safer S cathodes.

关键词： flame retardance Li-S cells minimized carbon ratio nano conductive ceramics three-in-one functionality

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