Aqueous
zinc-ion batteries (AZIBs) are promising candidates for
practical energy storage due to their superior energy density, nontoxicity,
and environmental friendliness. However, it is still a tremendous
quest to seek an outstanding cathode material to reach a splendid
rate property as well as stable long-term cycle property. Herein,
we present a self-template method to synthesize NH4V4O10 with a decussate structure and the intercalation
mechanism via a simple one-step hydrothermal method, which delivers
a prominent mass energy density of 332.25 W h kg–1, excellent rate performance, and a stable long-time cycle. Attributing
to its specific decussate morphology consisting of vast vertical nanobelts
and the intercalation of NH4
+ with hydrogen
bonding between ammonium ions and vanadium oxide layers as a “pillar”
in the V2O5 host, the NH4V4O10 electrode material can effectively prevent structural
collapse as well as promote the rate of electronic diffusion in the
de(intercalation) process of Zn2+. Importantly, the materials
not only deliver 243 and 221.4 mA h g–1 (98.7 and
90% retention of initial discharge capacity of 246 mA h g–1, respectively) in 1480 cycles and 2100 cycles, respectively, at
5 A g–1 but also maintain a specific capacity of
417.35 mA h g–1 at 0.1 A g–1 in
the 150th cycle, which delivers a superior property compared with
the previously reported metal-intercalated V2O5. Therefore, this work provides the direction to choose and design
a novel cathode material with a peculiar morphology and admirable
performance for AZIBs and other secondary batteries.
Ternary transition metal oxides have obtained increasingly attention thinks to their plenty of merits, which will enhance the electrochemical performance by the synergistic effect of different single metal oxides. Herein,...
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