1 research outputs found
Mixed 1T–2H Phase MoS<sub>2</sub>/Reduced Graphene Oxide as Active Electrode for Enhanced Supercapacitive Performance
A hybrid
aerogel, composed of MoS<sub>2</sub> sheets of 1T (distorted octahedral)
and 2H (trigonal prismatic) phases, finely mixed with few layers of
reduced graphene oxide (rGO) and obtained by means of a facile environment-friendly
hydrothermal cosynthesis, is proposed as electrode material for supercapacitors.
By electrochemical characterizations in three- and two-electrode configurations
and symmetric planar devices, unique results have been obtained, with
specific capacitance values up to 416 F g<sup>–1</sup> and
a highly stable capacitance behavior over 50000 charge–discharge
cycles. The in-depth morphological and structural characterizations
through field emission scanning electron microscopy, Raman, X-ray
photoelectron spectroscopy, X-ray diffraction, Brunauer–Emmett–Teller,
and transmission electron microscopy analysis provides the proofs
of the unique assembly of such 3D structured matrix. The unpacked
MoS<sub>2</sub> structure exhibits an excellent distribution of 1T
and 2H phase sheets that are highly exposed to interaction with the
electrolyte, and so available for surface/near-surface redox reactions,
notwithstanding the quite low overall content of MoS<sub>2</sub> embedded
in the reduced graphene oxide (rGO) matrix. A comparison with other
“more conventional” hybrid rGO-MoX<sub>2</sub> electrochemically
active materials, synthesized in the same conditions, is provided
to support the outstanding behavior of the cosynthesized rGO-MoS<sub>2</sub>