以静电纺丝技术为基础,组装含有金属有机框架MIL-88的氮掺杂复合纳米纤维。经过高温退火制备氮掺杂的含有Fe3C的碳纳米纤维(N-Fe3C-CNFs)。通过SEM、TEM、XRD、XPS对该材料的微观形态结构进行表征,并以此材料作为锂离子电池的负极材料...以静电纺丝技术为基础,组装含有金属有机框架MIL-88的氮掺杂复合纳米纤维。经过高温退火制备氮掺杂的含有Fe3C的碳纳米纤维(N-Fe3C-CNFs)。通过SEM、TEM、XRD、XPS对该材料的微观形态结构进行表征,并以此材料作为锂离子电池的负极材料对电池的循环性能、倍率性能、CV以及阻抗(EIS)等电化学性能进行研究。结果表明,当电流密度为1 A/g时,此材料循环200圈后仍具有756. 6 m Ah/g的可逆比容量。展开更多
Multi-walled carbon nanotubes were fabricated by chemical vapor deposition with acetylene as carbon source and titanate modified palygorskite as catalyst at high temperature. A part of as grown nanotubes was partially...Multi-walled carbon nanotubes were fabricated by chemical vapor deposition with acetylene as carbon source and titanate modified palygorskite as catalyst at high temperature. A part of as grown nanotubes was partially filled with foreign material in the shape of nanowire by transmission electron microscopy (TEM) observations. The encapsulated nanowires was single crystalline iron carbide upon selected area electron diffraction(SAED)patterns and X ray energy dispersive spectrum (EDS) results. Thermal gravimetric analyses (TGA) on the as grown samples indicated that the yield of carbon nanotubes was largest at 750℃ and the content of amorphous carbon decreased with increasing temperature. Furthermore, the growth mechanism was discussed on the experimental results in the paper.展开更多
文摘以静电纺丝技术为基础,组装含有金属有机框架MIL-88的氮掺杂复合纳米纤维。经过高温退火制备氮掺杂的含有Fe3C的碳纳米纤维(N-Fe3C-CNFs)。通过SEM、TEM、XRD、XPS对该材料的微观形态结构进行表征,并以此材料作为锂离子电池的负极材料对电池的循环性能、倍率性能、CV以及阻抗(EIS)等电化学性能进行研究。结果表明,当电流密度为1 A/g时,此材料循环200圈后仍具有756. 6 m Ah/g的可逆比容量。
文摘Multi-walled carbon nanotubes were fabricated by chemical vapor deposition with acetylene as carbon source and titanate modified palygorskite as catalyst at high temperature. A part of as grown nanotubes was partially filled with foreign material in the shape of nanowire by transmission electron microscopy (TEM) observations. The encapsulated nanowires was single crystalline iron carbide upon selected area electron diffraction(SAED)patterns and X ray energy dispersive spectrum (EDS) results. Thermal gravimetric analyses (TGA) on the as grown samples indicated that the yield of carbon nanotubes was largest at 750℃ and the content of amorphous carbon decreased with increasing temperature. Furthermore, the growth mechanism was discussed on the experimental results in the paper.
