2 research outputs found
In Situ Synthesis of WSe<sub>2</sub>/CMK‑5 Nanocomposite for Rechargeable Lithium-Ion Batteries with a Long-Term Cycling Stability
Transition metal
dichalcogenides (TMDs) have received intensive
interests in lithium-ion batteries owing to their unique lithium-ion
storage ability when evaluated as anode materials. In the present
work, a nanocomposite of WSe<sub>2</sub>/CMK-5 was successfully fabricated
via a nanocasting route, introducing the unique structure of mesoporous
carbon (CMK-5) as a nanorecator. Benefiting from a synergetic effect
of WSe<sub>2</sub> nanosheets and mesoporous carbon, the WSe<sub>2</sub>/CMK-5 hybrid electrode exhibited large reversible capacity, high
rate performance, and excellent long-term cycling stability. For instance,
a specific capacity of 490 mA h g<sup>–1</sup> can remain even
after 600 cycles at a current density of 0.5 A g<sup>–1</sup>
Ternary Photoanodes with AgAu Nanoclusters and CoNi-LDH for Enhanced Photoelectrochemical Water Oxidation
Atomically precise metal nanoclusters (NCs) present new
opportunities
for creating innovative solar-powered photoanodes due to their extraordinary
physicochemical properties. Nevertheless, ultrasmall metal NCs tend
to aggregate and lack active sites under light irradiation, which
severely limits their widespread application. We have developed a
strategy to design efficient ternary photoanodes by successively modifying
AgAu NCs and CoNi-LDH on BiVO4 substrates using versatile
impregnation and electrodeposition. The electronic properties of AgAu
NCs facilitate the rapid transfer of photogenerated carriers on BiVO4 and CoNi-LDH. Additionally, ultrathin CoNi-LDH acts as a
hole-collecting layer, which quickly extracts holes to the electrode/electrolyte
interface. The synergistic effect and the matched energy levels between
the ternary heterostructures promote the OER process, which significantly
improved the photoelectrochemical (PEC) water oxidation performance.
This study presents a new idea for further exploration of metal nanocluster-based
PEC systems