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Electrochemical behavior of SiOx anodes with variation of oxygen ratio for Li-ion batteries

Journal Article


Abstract


  • The development of a method for synthesizing granulated silicon oxide nanoparticles (SiOxNPG) via athermal plasma and water granulation process and determination of the optimum stoichiometry of siliconoxide (SiOx) for achieving high electrochemical performance of an anode based on the developed materialare presented herein. The structure of the SiOxNPGs was confirmed by means of X-ray fluorescence,transmission electron microscopy, and X-ray diffraction. A high initial capacity of ~1196 mA���h���g-1wasachieved using the fabricated SiOxanode with x ~1.06, giving rise to a Coulombic efficiency of 75% afterthe first cycle. Further combination of SiOxwith graphite (3 wt%) for use as an anode gave rise to highcapacity (397 mA���h���g-1) and a very high Coulombic efficiency of 99.99% after 200 cycles. The physicalproperties of the synthesized materials were investigated based on micrometric analysis. On the basisof the volume expansion and cycle capacity, the optimal oxygen ratio of SiOxwas determined to bex ~1.06

Publication Date


  • 2014

Citation


  • Suh, S. S., Yoon, W. Y., Kim, D. H., Kwon, S. U., Kim, J. H., Kim, Y. U., . . . Lee, J. K. (2014). Electrochemical behavior of SiOx anodes with variation of oxygen ratio for Li-ion batteries. Electrochimica Acta, 148, 111-117. doi:10.1016/j.electacta.2014.08.104

Scopus Eid


  • 2-s2.0-84908222684

Start Page


  • 111

End Page


  • 117

Volume


  • 148

Issue


Place Of Publication


Abstract


  • The development of a method for synthesizing granulated silicon oxide nanoparticles (SiOxNPG) via athermal plasma and water granulation process and determination of the optimum stoichiometry of siliconoxide (SiOx) for achieving high electrochemical performance of an anode based on the developed materialare presented herein. The structure of the SiOxNPGs was confirmed by means of X-ray fluorescence,transmission electron microscopy, and X-ray diffraction. A high initial capacity of ~1196 mA���h���g-1wasachieved using the fabricated SiOxanode with x ~1.06, giving rise to a Coulombic efficiency of 75% afterthe first cycle. Further combination of SiOxwith graphite (3 wt%) for use as an anode gave rise to highcapacity (397 mA���h���g-1) and a very high Coulombic efficiency of 99.99% after 200 cycles. The physicalproperties of the synthesized materials were investigated based on micrometric analysis. On the basisof the volume expansion and cycle capacity, the optimal oxygen ratio of SiOxwas determined to bex ~1.06

Publication Date


  • 2014

Citation


  • Suh, S. S., Yoon, W. Y., Kim, D. H., Kwon, S. U., Kim, J. H., Kim, Y. U., . . . Lee, J. K. (2014). Electrochemical behavior of SiOx anodes with variation of oxygen ratio for Li-ion batteries. Electrochimica Acta, 148, 111-117. doi:10.1016/j.electacta.2014.08.104

Scopus Eid


  • 2-s2.0-84908222684

Start Page


  • 111

End Page


  • 117

Volume


  • 148

Issue


Place Of Publication