Owing to the abundance and low price of sodium,researches on sodium-ion batteries(SIBs)as a lithiumion battery(LIB)alternative are emerging as a consensus.It is crucial to develop electrode materials suitable for sodi...Owing to the abundance and low price of sodium,researches on sodium-ion batteries(SIBs)as a lithiumion battery(LIB)alternative are emerging as a consensus.It is crucial to develop electrode materials suitable for sodium storage.In recent years,two-dimensional(2 D)layered transition metal disulfide compounds(TMDs)have trigered interest in the realm of energy and environmental fields.In particular,MoSeis thought to be a suitable material for SIBs due to its wide original layer spacing and high conductivity.Herein,N-doped dual carbon-coated MoSewith multichannel paths(MoSe/multichannel carbon nanofibers(MCFs)@NC)is fabricated via electrospinning,followed by a selenation and carbonization process.The existence of a 3 D conductive network,abundant void spaces,and sufficient electron transportation pathways are conducive to rapid and fast charge transfer kinetics under volume expansion stress.When applied in SIBs,the MoSe/MCFs@NC shows a high capability(319 mA hg^(-1)at 10 A g^(-1)),as well as good cycling stability(303 mA h g^(-1)after 1100 cycles at 10 A g^(-1)).Furthermore,coupled with the Na_(3)V_(2)(PO_(4))_(2)O_(2)F cathode,the full cell also exhibits excellent performance.The theoretical calculation of the MoSe_(2)/MCFs@NC confirms that the superiority of its SIB performance is owing to the strong interaction between the double-doped carbon and MoSe.This scheme provides a wide space for preparing high-performance electrode materials for SIBs.展开更多
基金financially supported by the National Natural Science Foundation of China(51801030)the Natural Science Foundation of Guangdong Providence(2018A030310571)+2 种基金the Science and Technology Development Plan of Suzhou(ZXL2021176)China Postdoctoral Science Foundation(2022M711686)Jiangsu Provincial Funds for the Young Scholars(BK20190978)。
文摘Owing to the abundance and low price of sodium,researches on sodium-ion batteries(SIBs)as a lithiumion battery(LIB)alternative are emerging as a consensus.It is crucial to develop electrode materials suitable for sodium storage.In recent years,two-dimensional(2 D)layered transition metal disulfide compounds(TMDs)have trigered interest in the realm of energy and environmental fields.In particular,MoSeis thought to be a suitable material for SIBs due to its wide original layer spacing and high conductivity.Herein,N-doped dual carbon-coated MoSewith multichannel paths(MoSe/multichannel carbon nanofibers(MCFs)@NC)is fabricated via electrospinning,followed by a selenation and carbonization process.The existence of a 3 D conductive network,abundant void spaces,and sufficient electron transportation pathways are conducive to rapid and fast charge transfer kinetics under volume expansion stress.When applied in SIBs,the MoSe/MCFs@NC shows a high capability(319 mA hg^(-1)at 10 A g^(-1)),as well as good cycling stability(303 mA h g^(-1)after 1100 cycles at 10 A g^(-1)).Furthermore,coupled with the Na_(3)V_(2)(PO_(4))_(2)O_(2)F cathode,the full cell also exhibits excellent performance.The theoretical calculation of the MoSe_(2)/MCFs@NC confirms that the superiority of its SIB performance is owing to the strong interaction between the double-doped carbon and MoSe.This scheme provides a wide space for preparing high-performance electrode materials for SIBs.
