By creatively utilizing natural inorganic/organic nanocomposites, shrimp skin byproduct was easily converted to nitrogen-rich mesoporous carbon, a promising anode material that showed excellent electrochemical performance for sodium ion batteries.
Fe3O4 is a
potential anode material for lithium-ion
batteries (LIBs) due to its high theoretical capacity (926 mAh g–1) and low cost, but its practical application is restricted
by its low electrical conductivity and large volume changes during
lithiation/delithiation. Herein, rationally designed Fe3O4/MXene hybrid heterostructures are constructed using
an interfacial self-assembly approach that allows spontaneous deposition
of Fe3O4 nanodots over Ti3C2T
x
MXene nanosheets. The van der Waals-facilitated
self-assembly process results in an ideal interfacial arrangement
where Fe3O4 and MXene are in a complementary
configuration. Among the different mass ratio arrangements, the self-assembled
composite with 70 wt % Fe3O4 (Fe3O4/MXene-7) exhibits a much enhanced capacity of 782.7
mAh g–1 at 0.1 A g–1 after 100
cycles, which retains 667.9 mAh g–1 at 1 A g–1 after 600 cycles without any capacity decay. The
devised anode could further maintain a reversible capacity of 279.1
mAh g–1 when the current density reaches 5 A g–1. Moreover, the charge storage capability of Fe3O4/MXene-7 is concluded to follow a dual-mode charge
storage (battery capacitive) mechanism, which anticipates the constructed
heterostructures promising future for next-generation LIBs.
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