Creation of micro and macro spaces by electrospinning and application to electrode materials of energy devices
Creation of micro and macro spaces by electrospinning and application to electrode materials of energy devices
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DOI：
10.1557/adv.2020.34
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发表时间：
2020-05
期刊：
影响因子：
0.8
通讯作者：
K. Oshida;N. Kobayashi;Kozo Osawa;Y. Takizawa;T. Itaya;M. Murata;S. Sato
中科院分区：
文献类型：
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作者：
K. Oshida;N. Kobayashi;Kozo Osawa;Y. Takizawa;T. Itaya;M. Murata;S. Sato
本研究旨在通过静电纺丝创造受控的精细空间，并开发用于高性能能源设备的电极材料。随着移动设备、家用电器、混合动力汽车、电动汽车等的普及，蓄电装置的用途不断扩大，需要进一步提高性能。在这项研究中，通过静电纺丝和热处理将硅与聚丙烯腈（PAN）衍生的碳纳米纤维复合，开发了一种新型电极材料。通过扫描电子显微镜（SEM）、能量色散X射线光谱仪（EDX）和透射电子显微镜（TEM）结合图像处理对纳米纤维的织构和结构进行观察和分析。 CNF 中产生了纳米空间，并且 Si 颗粒能够包含在 CNF 中。由该材料制成的锂离子电池（LIB）电极在第二次及后续循环的充放电实验中，容量是石墨理论容量的两倍以上，且具有良好的循环性能。
This study aims to create controlled fine space by electrospinning, and to develop the electrode materials for high-performance energy devices. With the popularization of mobile devices, household appliances, hybrid vehicles, electric vehicles, and the like, the use of power storage devices is expanding, and further performance improvements are required. In this study, a novel electrode material was developed by compositing Si with carbon nanofibers derived from polyacrylonitrile (PAN) by electrospinning and heat treatment. The texture and structure of the nanofibers were observed and analyzed by scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDX) and transmission electron microscopy (TEM) combined with image processing. Nano spaces were created in the CNFs and Si particles were able to be contained in the CNFs. In the second and subsequent cycles of the charge/discharge experiments of lithium ion battery (LIB) electrode made from the materials, the capacity was more than twice the theoretical capacity using graphite, and good cycle performance was obtained.