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Al-Doped Fe2O3 (Al-Fe2O3) nanoparticles with a reconstructed electronic structure, oxygen vacancy and modified physical/chemical features are synthesized and used as an advanced anode for Lithium Ion Batteries (LIBs). [ABSTRACT FROM AUTHOR]

The interfacial effect of nanomaterials plays a key role in their electrochemical performance when used in lithium-ion batteries (LIBs), but interfacial modification is a big challenging. Herein, a composite Fe 2 O 3 nanoparticles with atomic Ag/amorphous layers were successfully prepared by co-deposition and subsequent quenching method. Compared to pristine Fe 2 O 3 , it maintains a higher capacity and longer cycle life in LIBs, with a capacity of 1150 mAh g -1 after 600 cycles at 0.5 Ag -1 , and a long 1800 cycles at a current density of 5 Ag -1 after activation. Detailed experiments and Ex-situ TEM demonstrate that the fusion of surface particles occurred after calcination and quenching treatment, resulting in amorphous layers. The amorphous layer can act as a stabilizer during cycling, which protects the overall nanospheres structure from collapsing and thus leads to ultra-long cycling life. Our findings shed light on the surface modification of nanoscale materials and provides a manner to enhance the electrochemical performance of nanomaterials for LIBs., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier Inc. All rights reserved.)

Al-Doped Fe2O3 (Al-Fe2O3) nanoparticles with a reconstructed electronic structure, oxygen vacancy and modified physical/chemical features are synthesized and used as an advanced anode for Lithium Ion Batteries (LIBs).