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Particle size effect of silver nanoparticles decorated single walled carbon nanotube electrode for supercapacitors

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Particle size effect of silver nanoparticles decorated single walled carbon nanotube electrode for supercapacitors
นักวิจัย : Wee, Grace , Mak, Wai F. , Phonthammachai, Nopphawan , Kiebele, Andreas , Reddy, M. V. , Chowdari, B. V. R. , Gruner, George , Srinivasan, Madhavi , Mhaisalkar, Subodh G.
คำค้น : DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2552
อ้างอิง : Wee, G., Mak, W. F., Phonthammachai, N., Kiebele, A., Reddy, M. V., Chowdari, B. V. R., et al. (2010). Particle size effect of silver nanoparticles decorated single walled carbon nanotube electrode for supercapacitors. Journal of the electrochemical society, 157(2). A179-A184. , http://hdl.handle.net/10220/18844 , http://dx.doi.org/10.1149/1.3267874
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Journal of the electrochemical society
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Well dispersed silver nanoparticles (AgNPs) of different sizes (1–13 nm) on single walled carbon nanotubes (SWCNTs) were synthesized by a facile room-temperature deposition–precipitation process. The morphology and microstructure of samples examined by the transmission electron microscopy showed a monodispersed silver particle decorated SWCNT of 2 wt % as determined by the Rietveld phase analysis of powder X-ray diffraction patterns. The chemical state of silver determined from the binding energies of high resolution Ag 3d peaks from X-ray photoelectron spectroscopy revealed a silver (Ag0) oxidation state. Electrochemical properties were studied using cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance studies. Silver decorated SWCNTs demonstrated to be effective bifunctional charge collectors and active electrode materials for a supercapacitor, exhibiting a higher specific capacitance (106 F g−1) compared to pristine SWCNT (47 F g−1). An enhancement observed with AgNP decoration is highly size-dependent and is related to the improved intertube contact resistance, electroactive surface considerations, as well as the participation of Ag in a faradaic reaction induced pseudocapacitance. Decorating the SWCNT with 1 nm AgNP doubled the energy density of the device, which on charge–discharge cycling retained 84% of the initial capacitance at the end of 8000 cycles.

บรรณานุกรม :
Wee, Grace , Mak, Wai F. , Phonthammachai, Nopphawan , Kiebele, Andreas , Reddy, M. V. , Chowdari, B. V. R. , Gruner, George , Srinivasan, Madhavi , Mhaisalkar, Subodh G. . (2552). Particle size effect of silver nanoparticles decorated single walled carbon nanotube electrode for supercapacitors.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Wee, Grace , Mak, Wai F. , Phonthammachai, Nopphawan , Kiebele, Andreas , Reddy, M. V. , Chowdari, B. V. R. , Gruner, George , Srinivasan, Madhavi , Mhaisalkar, Subodh G. . 2552. "Particle size effect of silver nanoparticles decorated single walled carbon nanotube electrode for supercapacitors".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Wee, Grace , Mak, Wai F. , Phonthammachai, Nopphawan , Kiebele, Andreas , Reddy, M. V. , Chowdari, B. V. R. , Gruner, George , Srinivasan, Madhavi , Mhaisalkar, Subodh G. . "Particle size effect of silver nanoparticles decorated single walled carbon nanotube electrode for supercapacitors."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2552. Print.
Wee, Grace , Mak, Wai F. , Phonthammachai, Nopphawan , Kiebele, Andreas , Reddy, M. V. , Chowdari, B. V. R. , Gruner, George , Srinivasan, Madhavi , Mhaisalkar, Subodh G. . Particle size effect of silver nanoparticles decorated single walled carbon nanotube electrode for supercapacitors. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2552.