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Research & Reviews: Journal of Material Sciences | ISSN: 2321-6212 | Volume 6
Theoretical, Materials and Condensed Matter Physics
5
th
International Conference on
November 26-28, 2018 | Los Angeles, USA
Carbon nanotubes/metal-sulfide composite flexible electrode for quantum dot-sensitized solar cells and
super-capacitor
Hee-Je Kim and Chandu VVM Gopi
Pusan National University, South Korea
C
arbon nanotubes (CNT) and metal sulfides have attracted considerable attention owing to their outstanding properties and
multiple application areas, such as electrochemical energy conversion and energy storage. Here we describes a cost-effective
and facile solution approach to the preparation of metal sulfides (PbS, CuS, CoS, and NiS) grown directly on CNTs, such as CNT/
PbS, CNT/CuS, CNT/CoS, and CNT/NiS flexible electrodes for quantum dot-sensitized solar cells (QDSSCs) and supercapacitors
(SCs). X-ray photoelectron spectroscopy, X-ray diffraction, and transmission electron microscopy confirmed that the CNT network
was covered with high-purity metal sulfide compounds. QDSSCs equipped with the CNT/NiS counter electrode (CE) showed an
impressive energy conversion efficiency (η) of 6.41% and remarkable stability. Interestingly, the assembled symmetric CNT/NiS based
polysulfide SC device exhibited a maximal energy density of 35.39
W.h.kg−1
and superior cycling durability with 98.39% retention
after 1,000 cycles compared to the other CNT/metal-sulfides. The elevated performance of the composites was attributed mainly to
the good conductivity, a high surface area with mesoporous structures and stability of the CNTs and the high electrocatalytic activity
of the metal sulfides. Overall, the designed composite CNT/metal-sulfide electrodes offer an important guideline for the development
of next level energy conversion and energy storage devices.
heeje@pusan.ac.krRes. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C10-042