Publication: Interpenetrating network of titania and carbon ultrafine fibers as hybrid anode materials for high performance sodium-ion batteries
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Issued Date
2017-06-01
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00134686
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2-s2.0-85017410391
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Mahidol University
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SCOPUS
Bibliographic Citation
Electrochimica Acta. Vol.238, (2017), 349-356
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Ponlawat Udomsanti, Thammasit Vongsetskul, Pimpa Limthongkul, Pramuan Tangboriboonrat, Kittitat Subannajui, Phontip Tammawat Interpenetrating network of titania and carbon ultrafine fibers as hybrid anode materials for high performance sodium-ion batteries. Electrochimica Acta. Vol.238, (2017), 349-356. doi:10.1016/j.electacta.2017.03.156 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/42193
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Title
Interpenetrating network of titania and carbon ultrafine fibers as hybrid anode materials for high performance sodium-ion batteries
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Abstract
© 2017 Elsevier Ltd Interpenetrating networks (IPNs) of titania, having high cycling stability and rate capability, and carbon, having high electrical conductivity and capacity, ultrafine fibers were fabricated by a co-electrospinning technique in opposite directions. The IPN structure promoted a contact between titania and carbon fibers, minimized strain during ion de-insertion, and prevented agglomeration that shortened the cycling stability. Images from scanning electron microscopy with backscattering electron detector and X-ray diffraction spectra confirm the existence of the IPN structure of both types of fibers. Thermogravimetric analysis and Raman spectroscopy of the composite fibers reveal their 37 wt% of titania content and 1.2 ratio between disorder and graphitic carbon (ID/IG). A galvanostatic curve displays stable reversible capacities of 202 and 247 mA h g−1 for charge and discharge after the fifth cycle at a current density of 25 mA g−1. The material had a superior discharge capacity of 151 and 123 mA h g−1 at 125 and 250 mA g−1, respectively. Moreover, the discharge capacity could be maintained at 134 mA h g−1 after 100 cycles at 125 mA g−1 with a Coulombic efficiency of more than 98%, presenting a long life cycle of batteries. Therefore, the prepared IPN composite fibers can be an efficient anode for sodium-ion batteries.