TY - JOUR
T1 - Synthesis of hexagonal-shaped SnO2 nanocrystals and SnO 2@C nanocomposites for electrochemical redox supercapacitors
AU - Selvan, Ramakrishnan Kalai
AU - Perelshtein, Ilana
AU - Perkas, Nina
AU - Gedanken, Aharon
PY - 2008/2/14
Y1 - 2008/2/14
N2 - To realize a suitable supercapacitor nanomaterial, the recently developed technique of reaction under autogenic pressure at elevated temperature has been employed by us to synthesize SnO2 hexagonal nanocrystals and SnO 2 @ C nanocomposites. The synthesis at different temperatures (viz. 500, 600, and 700°C) yields three different composites. Characterization of these composites by various methods confirms the structural (XRD, Raman, FT-IR) and nanoparticulate (TEM, HRTEM) nature of the synthesized materials. TEM studies including HRTEM reveal that all the synthesized SnO2 and SnO2@C nanomaterials are highly crystalline with hexagonal shape. Cyclic voltammetric studies carried out to examine the capacitance of SnO 2@C in 1 M H2SO4 show that the nanocomposite prepared at 700°C has a maximum specific capacitance of 37.8 F/g at a scan rate of 5 mV/s.
AB - To realize a suitable supercapacitor nanomaterial, the recently developed technique of reaction under autogenic pressure at elevated temperature has been employed by us to synthesize SnO2 hexagonal nanocrystals and SnO 2 @ C nanocomposites. The synthesis at different temperatures (viz. 500, 600, and 700°C) yields three different composites. Characterization of these composites by various methods confirms the structural (XRD, Raman, FT-IR) and nanoparticulate (TEM, HRTEM) nature of the synthesized materials. TEM studies including HRTEM reveal that all the synthesized SnO2 and SnO2@C nanomaterials are highly crystalline with hexagonal shape. Cyclic voltammetric studies carried out to examine the capacitance of SnO 2@C in 1 M H2SO4 show that the nanocomposite prepared at 700°C has a maximum specific capacitance of 37.8 F/g at a scan rate of 5 mV/s.
UR - http://www.scopus.com/inward/record.url?scp=40049091432&partnerID=8YFLogxK
U2 - 10.1021/jp076995q
DO - 10.1021/jp076995q
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AN - SCOPUS:40049091432
SN - 1932-7447
VL - 112
SP - 1825
EP - 1830
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 6
ER -