材料科学
硒化物
阳极
硫系化合物
碳纤维
化学工程
混合材料
硫化
碳化
金属
电化学
无机化学
纳米技术
复合材料
冶金
电极
复合数
硫黄
物理化学
化学
硒
工程类
扫描电子显微镜
作者
Longfei Zhai,Ji-Ming Yu,Ji-Peng Yu,Wei‐Wei Xiong,Qichun Zhang
标识
DOI:10.1021/acsami.2c15688
摘要
Carbon-coated metal chalcogenide composites have been demonstrated as one type of promising anode material for sodium-ion batteries (SIBs). However, combining carbon materials with micronanoparticles of metal chalcogenide always involve complicated processes, such as polymer coating, carbonization, and sulfidation/selenization. To address this issue, herein, we reported a series of carbon-coated FexSey@CN (FexSey = FeSe2, Fe3Se4, Fe7Se8) composites prepared via the thermodynamic transformation of a crystalline organic hybrid iron selenide [Fe(phen)2](Se4) (phen = 1,10-phenanthroline). By pyrolyzing the bulk crystals of [Fe(phen)2](Se4) at different temperatures, FexSey microrods were formed in situ, where the nitrogen-doped carbon layers were coated on the surface of the microrods. Moreover, all the as-prepared FexSey@CN composites exhibited excellent sodium-ion storage capabilities as anode materials in SIBs. This work proves that crystalline organic hybrid metal chalcogenides can be used as a novel material system for the in situ formation of carbon-coated metal chalcogenide composites, which could have great potential in the application of electrochemical energy storage.
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