Ni_3S_2纳米片的原位制备及储锂性能研究
|
摘要
采用原位生长法,以泡沫Ni为衬底成功制备出具有三维互联结构的Ni_3S_2纳米片.利用XRD、SEM、TEM分别对材料进行组分、形貌和晶体结构的表征分析.生长在泡沫镍上的Ni_3S_2纳米片直接作为锂离子电池电极,免去了传统电极制备所必须的导电剂和粘结剂.电化学测试结果表明,电极具有高的比容量、优异的循环稳定性和倍率性能.在500 m A/g电流密度下经过80次循环,可逆比容量仍保持在850 m Ah/g.
Three-dimensional interconnected Ni_3S_2 nanosheets were successfully synthesized on Ni foam by in-situ growth method. The components,crystal structure and morphology were characterized by X-ray diffraction( XRD),scanning electron microscopy( SEM) and transmission electron microscopy( TEM),respectively.The obtained Ni_3S_2 nanosheets on Ni foam were directly used as an anode for lithium-ion batteries without using any binder or conducting additive traditionally. The anodes showed the high reversible capacity,good cycle stability and superior rate capability. A reversible capacity of up to 850 m Ah/g was obtained after 80 cycles at a current density of 500 m A/g.
Three-dimensional interconnected Ni_3S_2 nanosheets were successfully synthesized on Ni foam by in-situ growth method. The components,crystal structure and morphology were characterized by X-ray diffraction( XRD),scanning electron microscopy( SEM) and transmission electron microscopy( TEM),respectively.The obtained Ni_3S_2 nanosheets on Ni foam were directly used as an anode for lithium-ion batteries without using any binder or conducting additive traditionally. The anodes showed the high reversible capacity,good cycle stability and superior rate capability. A reversible capacity of up to 850 m Ah/g was obtained after 80 cycles at a current density of 500 m A/g.
引文
[1] Yue H W,Li Q,Liu D Q,et al. High-yield fabrication of graphene-wrapped silicon nanoparticles for selfsupp-ort andbinder-free anodes of lithium-ion batteries[J]. Journal of Alloys and Compounds,2018,744:243-251.
[2] Lai C H,Lu M Y,Chen L J. Metal sulfide nanostructures:synthesis,properties and applications in energy conversion andstorage[J]. Journal of Materials Chemistry,2012,22:19-30.
[3] Wang Y,Niu Y B,Li M C. The effect of the morphologies of Ni3S2anodes on the performance of Lithium-ion batteries[J]. Chemistryselect,2017,2(16):4 445-4 451.
[4] Ni S B,Yang X L,Li T. Fabrication of porous Ni3S2/Ni nanostructured electrode and its application in lithium ion battery[J]. Materials Chemistry&Physics,2012,132(2-3):1 103-1 107.
[5] Li D,Li X W,Hou X Y,et al. Building a Ni3S2nanotube array and investigating its application as an electrode for lithiumion batteries[J]. Chemical Communications,2014,50:9 361-9 364.
[2] Lai C H,Lu M Y,Chen L J. Metal sulfide nanostructures:synthesis,properties and applications in energy conversion andstorage[J]. Journal of Materials Chemistry,2012,22:19-30.
[3] Wang Y,Niu Y B,Li M C. The effect of the morphologies of Ni3S2anodes on the performance of Lithium-ion batteries[J]. Chemistryselect,2017,2(16):4 445-4 451.
[4] Ni S B,Yang X L,Li T. Fabrication of porous Ni3S2/Ni nanostructured electrode and its application in lithium ion battery[J]. Materials Chemistry&Physics,2012,132(2-3):1 103-1 107.
[5] Li D,Li X W,Hou X Y,et al. Building a Ni3S2nanotube array and investigating its application as an electrode for lithiumion batteries[J]. Chemical Communications,2014,50:9 361-9 364.