Tin nanoparticles encapsulated in porous multichannel carbon microtubes: preparation by single-nozzle electrospinning and application as anode material for high-performance Li-based batteries.
Tin nanoparticles encapsulated in porous multichannel carbon microtubes: preparation by single-nozzle electrospinning and application as anode material for high-performance Li-based batteries.
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DOI：
10.1021/ja906261c
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发表时间：
2009-10
影响因子：
15
通讯作者：
Yan Yu;L. Gu;Changbao Zhu;P. V. van Aken;J. Maier
中科院分区：
文献类型：
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作者：
Yan Yu;L. Gu;Changbao Zhu;P. V. van Aken;J. Maier
采用单喷嘴静电纺丝技术对pan - pmma -八酸锡纳米纤维进行炭化处理，制备了包裹在多孔多通道碳微管（spmct）中的锡纳米颗粒。该材料在可逆容量、循环性能和倍率性能方面表现出优异的锂离子电池负极应用特性。采用这种生产配置可以解决长期存在的问题，即在获得高锡颗粒堆积密度的同时，保留足够的备用空间，以缓冲锂合金化和脱合金化过程中的体积变化。此外，多孔碳壳保留了功能活性锡金属的机械和化学稳定性，也作为高导电介质允许Li（+）进入。
Tin nanoparticles encapsulated in porous multichannel carbon microtubes (denoted as SPMCTs) were prepared by carbonization of electrospun PAN-PMMA-tin octoate nanofibers fabricated using a single-nozzle electrospinning technique. This material exhibited excellent characteristics for lithium ion battery anode applications in terms of reversible capacities, cycling performance, and rate capability. Undertaking such a production configuration allows the long-existing problem of obtaining a high packing density of tin particles while retaining sufficient spare space to buffer the volume variation during lithium alloying and dealloying processes to be properly addressed. Furthermore, the porous carbon shell preserves both the mechanical and chemical stability of the function-active Sn metal, which also serves as a highly conductive medium allowing Li(+) to access.