TY - JOUR
T1 - Hydrothermally synthesized RuO 2/Carbon nanofibers composites for use in high-rate supercapacitor electrodes
AU - Chuang, Chih Ming
AU - Huang, Cheng Wei
AU - Teng, Hsisheng
AU - Ting, Jyh Ming
N1 - Funding Information:
This work was supported by Delta Electronics, Inc. in Taiwan under contract # 2010 NCKU-Delta D99-05 and the National Science Council in Taiwan under Grant # NSC 101-3113-E-006-010 .
PY - 2012/8/22
Y1 - 2012/8/22
N2 - A conventional hydrothermal deposition process is used to graft ruthenium oxide (RuO 2) nanoparticles onto carbon nanofibers (CNFs). The obtained RuO 2 nanoparticles have an average diameter of 2nm and are homogenously distributed on the CNF surfaces. Supercapacitors are fabricated using the resulting RuO 2 grafted CNFs nanocomposite as the electrodes. The existence of CNFs leads to reduced contact resistance among the RuO 2 nanoparticles and provides a network for fast electron transport, which then contributes to enhanced electrochemical performance. The enhancement is proportional to the RuO 2 content and can be as high as 638% at a high sweep rate of 200mVs -1, at which a capacitance is 155Fg -1. Stability of the RuO 2-grafted CNF capacitor is also demonstrated by subjecting the capacitor to a potential sweep at 500mVs -1 for 1000 cycles. Furthermore, the RuO 2 grafted CNF capacitor exhibits a very short relaxation time of 0.17s, which is desirable for high rate charge and discharge.
AB - A conventional hydrothermal deposition process is used to graft ruthenium oxide (RuO 2) nanoparticles onto carbon nanofibers (CNFs). The obtained RuO 2 nanoparticles have an average diameter of 2nm and are homogenously distributed on the CNF surfaces. Supercapacitors are fabricated using the resulting RuO 2 grafted CNFs nanocomposite as the electrodes. The existence of CNFs leads to reduced contact resistance among the RuO 2 nanoparticles and provides a network for fast electron transport, which then contributes to enhanced electrochemical performance. The enhancement is proportional to the RuO 2 content and can be as high as 638% at a high sweep rate of 200mVs -1, at which a capacitance is 155Fg -1. Stability of the RuO 2-grafted CNF capacitor is also demonstrated by subjecting the capacitor to a potential sweep at 500mVs -1 for 1000 cycles. Furthermore, the RuO 2 grafted CNF capacitor exhibits a very short relaxation time of 0.17s, which is desirable for high rate charge and discharge.
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U2 - 10.1016/j.compscitech.2012.05.024
DO - 10.1016/j.compscitech.2012.05.024
M3 - Article
AN - SCOPUS:84864402144
SN - 0266-3538
VL - 72
SP - 1524
EP - 1529
JO - Composites Science and Technology
JF - Composites Science and Technology
IS - 13
ER -