Template-Free Synthesis of Sb(2)S(3) Hollow Microspheres as Anode Materials for Lithium-Ion and Sodium-Ion Batteries.

Template-Free Synthesis of Sb(2)S(3) Hollow Microspheres as Anode Materials for Lithium-Ion and Sodium-Ion Batteries.
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无模板合成Sb2S3空心微球作为锂离子和钠离子电池负极材料

DOI:
10.1007/s40820-017-0165-1
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发表时间:
2018
期刊:
影响因子:
26.6
通讯作者:
Wang X
Wang X
中科院分区:
材料科学1区
文献类型:
--
作者:
Xie J;Liu L;Xia J;Zhang Y;Li M;Ouyang Y;Nie S;Wang X

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通过简单实用的水热反应,成功地合成了纳米线组装的层叠式sb2s3空心微球。通过x射线衍射、聚焦离子束扫描电镜双光束系统和透射电镜研究了这种结构的可能形成过程。作为锂离子电池的负极材料,sb2s3h空心微球表现出优异的倍率性能和增强的锂存储能力,在200 mA g-1电流密度下,经过50次循环后可提供674 mAh g-1的放电容量。即使在5000 mA g-1的高电流密度下,也可以实现541 mAh g-1的放电容量。sb2s3空心微球还显示出突出的储钠能力,在200 mA g-1电流密度下,50次循环后可保持384 mAh g-1的可逆放电容量。优异的锂/钠存储性能可能归功于其纳米尺寸和三维分层结构的协同作用,而优异的稳定性则归功于其充足的内部空隙空间,可以缓冲体积膨胀。
Hierarchical Sb2S3hollow microspheres assembled by nanowires have been successfully synthesized by a simple and practical hydrothermal reaction. The possible formation process of this architecture was investigated by X-ray diffraction, focused-ion beam-scanning electron microscopy dual-beam system, and transmission electron microscopy. When used as the anode material for lithium-ion batteries, Sb2S3hollow microspheres manifest excellent rate property and enhanced lithium-storage capability and can deliver a discharge capacity of 674 mAh g-1at a current density of 200 mA g-1after 50 cycles. Even at a high current density of 5000 mA g-1, a discharge capacity of 541 mAh g-1is achieved. Sb2S3hollow microspheres also display a prominent sodium-storage capacity and maintain a reversible discharge capacity of 384 mAh g-1at a current density of 200 mA g-1after 50 cycles. The remarkable lithium/sodium-storage property may be attributed to the synergetic effect of its nanometer size and three-dimensional hierarchical architecture, and the outstanding stability property is attributed to the sufficient interior void space, which can buffer the volume expansion.
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