TiO₂ Nanobelt@Co₉S₈ Composites as Promising Anode Materials for Lithium and Sodium Ion Batteries.

TiO₂ Nanobelt@Co₉S₈ Composites as Promising Anode Materials for Lithium and Sodium Ion Batteries.
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TiO2 纳米带@ Co9S8 复合材料作为锂和钠离子电池的有前景的负极材料

DOI:
10.3390/nano7090252
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发表时间:
2017-09-02
期刊:
Nanomaterials (Basel, Switzerland)
影响因子:
--
通讯作者:
Jiang F
Jiang F
中科院分区:
其他
文献类型:
--
作者:
Zhou Y;Zhu Q;Tian J;Jiang F

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TiO 2阳极由于其良好的循环稳定性而引起了锂离子电池和钠离子电池(LIB和SIB)的极大关注。然而,低的比容量和低的导电性限制了它们的实际应用。采用溶剂热法合成了混合相TiO 2纳米带(TiO 2-B和TiO 2-B)基Co 9 S8复合材料。在TiO 2纳米带和Co 9 S8之间的葡萄糖作为连接剂,促进了硫化物在TiO 2纳米带表面的成核和生长。作为锂离子电池和锂离子电池的阳极材料,该复合材料联合收割机结合了TiO 2纳米带和Co 9 S8纳米材料的优点。在0.1 A·g-1下,100次循环后,TiO 2纳米带@Co9S8复合材料的可逆比容量分别达到889和387 mAh·g-1。TiO 2纳米带的优异循环稳定性和Co 9 S8纳米粒子的高容量的协同作用使得TiO 2纳米带@Co9S8复合材料具有良好的电化学性能。
TiO2 anodes have attracted great attention due to their good cycling stability for lithium ion batteries and sodium ion batteries (LIBs and SIBs). Unfortunately, the low specific capacity and poor conductivity limit their practical application. The mixed phase TiO2 nanobelt (anatase and TiO2-B) based Co9S8 composites have been synthesized via the solvothermal reaction and subsequent calcination. During the formation process of hierarchical composites, glucose between TiO2 nanobelts and Co9S8 serves as a linker to increase the nucleation and growth of sulfides on the surface of TiO2 nanobelts. As anode materials for LIBs and SIBs, the composites combine the advantages of TiO2 nanobelts with those of Co9S8 nanomaterials. The reversible specific capacity of TiO2 nanobelt@Co9S8 composites is up to 889 and 387 mAh·g−1 at 0.1 A·g−1 after 100 cycles, respectively. The cooperation of excellent cycling stability of TiO2 nanobelts and high capacities of Co9S8 nanoparticles leads to the good electrochemical performances of TiO2 nanobelt@Co9S8 composites.
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