Structure adapting of bulk FeS_(2) micron particles and the corresponding anode for high performance sodium-ion batteries
作者机构：State Key Laboratory of Space Power-Sources TechnologyShanghai Institute of Space Power SourcesShanghai200245China Department of ChemistryFudan UniversityShanghai200433China Institute for Sustainable Energy/College of SciencesShanghai UniversityShanghai200444China
出 版 物：《Journal of Materiomics》 (无机材料学学报（英文）)
年 卷 期：2022年第8卷第6期
页 面：1278-1286页
核心收录：
学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学]
基 金：financial support by National Key Research and Development Program of China(2018YFB0104400) the Natural Science Foundation of Shanghai(21ZR1443200) Shanghai Rising-Star Program(No.20QB1401700,No.21QB1401400) the Science and Technology Commission of Shanghai Municipality(20511107800) Shanghai Sailing Program(18YF1417000) the University Scientific Research Project of Xinjiang Uygur Autonomous Region(XJEDU2018Y043)
主 题：Pyrite iron disulfide Polyaniline Single wall carbon nanotube Flexible Sodium-ion batteries
摘 要：The practical application of Pyrite iron disulfide (FeS_(2)) as anode material of sodium-ion battery is limitedby its low electronic conductivity, large volume changes during charge/discharge. To overcome thesechallenges, a novel structure design single-walled carbon nanotubes (SWCNTs) composited polyaniline(PANI)-wrapped FeS_(2) (FeS_(2)-PANI-SWCNTs) electrodes are successfully achieved in this work. PANI canprotect the FeS_(2) particles from collapse and offer a protective layer to relive the polysulfides shuttlingeffect, and also promote the electron and Naþ diffusion during the chemical conversion process. Underthe dual protection of PANI and SWCNTs, the FeS_(2)-PANI-SWCNTs film electrode demonstrates a goodstructural integrity, which accounts for the excellent rate capability and long cycling performance. Inaddition, the PANI coating and SWCNT network in the fabricated electrode can synergistically anchorpolysulfides and therefore strongly suppress shuttle effect during the chargeedischarge processes,resulting in less capacity loss. The anode with a loading 3.2 mg cm 2 of FeS_(2) coated with PANI exhibitsthe initial coulombic efficiency of 81.5% and delivers a specific capacity of 625.8 mAh g^(-1) after 100 cyclesat 200 mA g^(-1). High flexible and binder-free FeS_(2)-PANI-SWCNTs film anode demonstrates a reversiblecapacity of 537 mAh g^(-1) after 550 cycles at 1 A g^(-1). This research may offer an efficient method toimprove electrochemical performance of the metal sulfides in sodium-ion batteries.
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