Publication: Interpenetrating network of titania and carbon ultrafine fibers as hybrid anode materials for high performance sodium-ion batteries
Issued Date
2017-06-01
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ISSN
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
Suggested Citation
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/20.500.14594/42193
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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.