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

扫码查看

原文链接

维普
万方数据

外文摘要：Using porous carbon hosts in cathodes of Li-S cells can disperse S actives and offset their poor electrical conductivity.However,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 devices.To build better cathodes,we propose to substitute carbons by In-doped Sn02(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 actives.Also,such ceramics are intrinsically nonflammable,preventing S cathodes away from thermal runaway or explosion.These 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 behaviors.With lean and LiNO3-free electrolyte,packed full cells exhibit excellent redox kinetics,suppressed LiPS shuttling,and excellent cyclability.This may trigger great research enthusiasm in rational design of low-carbon and safer S cathodes.

外文关键词：

flame retardanceLi-S cellsminimized carbon rationano conductive ceramicsthree-in-one functionality

作者：

Ning Li、Chang Sun、Jianhui Zhu、Shun Li、Yanlong Wang、Maowen Xu、Changming Li、Jian Jiang

展开 >

作者单位：

School of Materials and Energy,and Chongqing Key Lab for Advanced Materials and Clean Energies of Technologies,Southwest University,Chongqing 400715,China

School of Physical Science and Technology,Southwest University,Chongqing 400715,China

Key Laboratory of Chemical Lasers,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China

College of Chemistry and Chemical Engineering,Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province,and Key Laboratory of Functional Materials and Photoelectrochemistry of Haikou,Hainan Normal University,Haikou 571158,China

展开 >

基金：

国家自然科学基金国家自然科学基金中央高校基本科研业务费专项Venture & Innovation Support Program for Chongqing Overseas Returneesinnovation platform for academicians of Hainan province

项目编号：

5180226921773138XDJK2019AA002cx2018027

出版年：

2023

DOI：

10.1002/eem2.12354

能源与环境材料(英文)

CSCD

ISSN：

年,卷(期)：2023.6(3)

参考文献量46