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
Bibliographical noteFunding Information:
This research was supported by a grant from the Fundamental R&D Program for Technology of World Premier Materials (WPM) funded by the Ministry of Knowledge Economy, Republic of Korea. The authors gratefully acknowledge the assistance from Daejoo Electronic Materials for supplying the SiO x raw material. This study was supported by a National Research Foundation (NRF) of Korea grant (2011-0028757) funded by the Ministry of Education, Science and Technology (MEST), the Korean Government.
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- Coulombic efficiency
- Electrode expansion
- Oxygen ratio
ASJC Scopus subject areas
- Chemical Engineering(all)