溶剂热法制备镍掺杂铁基金属有机骨架化合物及其储锂特性
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摘要
采用溶剂热合成法制备出镍掺杂的铁基金属有机骨架化合物(Fe-MOF),通过X射线衍射,扫描电子显微镜等对材料的形貌与结构进行了测试与表征,并测试了其作为锂电池负极材料的电化学性能。结果表明:材料为块状结构,颗粒大小分布为100～200nm。在电流密度为500mA/g的条件下,经过400次充放电工作循环后,容量稳定在511.8mA·h/g,相应的Coulomb效率为99.5%,显示出材料较高的比容量和优异的循环稳定性,是一种潜在的锂电池负极材料。
Nickel-doped Fe-based metal-organic framework compound(i.e., Ni-doped Fe-MOF) was synthesized by a solvothermal method. The morphology and structure of Ni-doped Fe-MOF were characterized by X-ray diffraction, scanning electron microscopy and electrochemical technique. The results show that Ni-doped Fe-MOF is a massive structure with a particle size of 100-200nm.The Ni-doped Fe-MOF as a lithium battery anode material can deliver a stable capacity of 511.8mA-h/g with the corresponding coulomb efficiency of 99.5% after 400 charge and discharge cycles at a current density of 500mA/g. It is indicated that Ni-doped Fe-MOF can be used as a potential anode material.
Nickel-doped Fe-based metal-organic framework compound(i.e., Ni-doped Fe-MOF) was synthesized by a solvothermal method. The morphology and structure of Ni-doped Fe-MOF were characterized by X-ray diffraction, scanning electron microscopy and electrochemical technique. The results show that Ni-doped Fe-MOF is a massive structure with a particle size of 100-200nm.The Ni-doped Fe-MOF as a lithium battery anode material can deliver a stable capacity of 511.8mA-h/g with the corresponding coulomb efficiency of 99.5% after 400 charge and discharge cycles at a current density of 500mA/g. It is indicated that Ni-doped Fe-MOF can be used as a potential anode material.
引文
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[6]LIU W,YANG H Z,ZHAO L,et al.Mesoporous flower-like CO_3O_4/C nanosheet composites and their performance evaluation as anodes for lithium ion batteries[J].Electrochim Acta,2016,207:293-300.
[7]ZHAO C C,SHEN C,HAN W Q.Metal-organic nanofibers as anodes for lithium-ion batteries[J].RSC Adv,2015,5(26):20386-20389.
[8]MAITI S,PRAMANIK A,MANJU U,et al.Cu3(1,3,5-benzenetricarboxylate)2 metal-organic framework:A promising anode material for lithium-ion battery[J].Micropor Mesopor Mater,2016,226:353-359.
[9]CUI X D,XIE Z Q,WANG Y.Novel CoS_2 embedded carbon nanocages by direct sulfurizing metal-organic frameworks for dye-sensitized solar cells[J].Nanoscale,2016,8(23):11984-11992.
[10]JIN Y,ZHAO C C,SUN Z X,et al.Facile synthesis of Fe-MOF/RGO and its application as a high performance anode in lithium-ion batteries[J].RSC Adv,2016,6(36):30763-30768.
[11]YE X,ZHANG W,LIU Q,et al.One-step synthesis of Ni-doped Sn02nanospheres with enhanced lithium ion storage performance[J].New JChem,2014,39(1):130-135.
[12]ZHANG Z C,CHEN Y F,HE S,et al.Hierarchical Zn/Ni-MOF-2nanosheet-assembled hollow nanocubes for multicomponent catalytic reactions[J].Angew Chem Int Ed,2014,53(46):12517-12521.
[13]WANG L,WU Y Z,CAO R,et al.Fe/Ni metal-organic frameworks and their binder-free thin films for efficient oxygen evolution with low overpotential[J].ACS Appl Mater Interface,2016,8(26):16736-16743.
[14]LI H,SHI W,ZHAO K N,et al.Enhanced hydrostability in Ni-doped MOF-5[J].J Am Chem,2012,51:9200-9207.
[15]OYAIUO K,HATEMATA A,CHOI W,et al.Redox-active polyimide/carbon nanocomposite electrodes for reversible charge storage at negative potentials:expanding the functional horizon of polyimides[J].J Mater Chem,2010,20(26):5404-5410.
[16]SUGA T,OHSHIRO H,SUGITA S,et al.Emerging N-Type redox-active radical polymer for a totally organic polymer-based rechargeable battery[J].Adv Mater,2009,21(21):1627-630.
[17]CHEN H Y,MICHEL A,MATTHIEU C,et al.Lithium salt of tetrahydroxybenzoquinone:toward the development of a sustainable Li-ion battery[J].J Am Chem,2009,131:8984-8988.
[18]SU Y S,ARUMUMGAM M.Lithium-sulphur batteries with a microporous carbon paper as a bifunctional interlayer[J].Nat Commun,2012,3(6):1166-1171.