Abstract
Abstract Nanotechnology has been demonstrated as a useful scheme to improve the lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) performance based on iron oxide. However, the poor intrinsic electric conductivity of iron oxide limits its further applications. Herein, we successfully synthesize an innovative core-shell Ag@Fe3O4 nanospheres via a facile hydrothermal method with a uniform core size of ∼70 nm and shell thickness of ∼60 nm. Through constructing conductive silver core with Fe3O4 as the shell part to enhance the binding force between Ag and Fe3O4 nanoparticles, and the internal resistance could decrease. Hence, the core-shell Ag@Fe3O4 nanospheres exhibit a high rate performance as the anode in LIBs and SIBs. Meanwhile, cycling stability at high current density is enhanced by internal Ag core because of its supporting effect. We believe that this work can open an avenue to modulating the conductivity of electrode materials.
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