Owing to their low cost and abundant reserves relative
to conventional lithium-ion batteries (LIBs), potassium-ion batteries
(PIBs), and aluminum-ion batteries (AIBs) have shown appealing potential
for electrochemical energy storage, but progress so far has been limited
by the lack of suitable electrode materials. In this work, we demonstrated
a facile strategy to achieve highly reversible potassium and aluminum
ions storage in strongly coupled nanosized MoSe2@carbon
matrix, induced through an ion complexation strategy. We present a
broad range of electrochemical characterization of the synthesized
product that exhibits high specific capacities, good rate capability,
and excellent cycling stability toward PIBs and AIBs. Through a series
of systematic ex situ X-ray photoelectron spectroscopy (XPS) characterizations
and density functional theory (DFT) calculations, the Al3+ intercalation mechanism of MoSe2-based AIBs are elucidated.
Moreover, both the assembled PIBs and AIBs worked well when exposed
to low and high temperatures within the range of −10 to 50
°C, showing promise for energy storage devices in harsh environment.
The present study provides new insights into the exploration of MoSe2 as high-performance electrode materials for PIBs and AIBs.
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