Construction of heterostructured Fe₂O₃/Fe₇S₈hollow fibers to boost the electrochemical kinetics of lithium storage

Abstract

Benefitting from the synergistic effect of a hollow structure and a built-in electric field induced by the heterostructure, the as-prepared Fe2O3/Fe7S8 composite anode exhibits excellent electrochemical performance.

Reinforced Interfacial Interaction between Si and Graphite To Improve the Cyclic Stability of Lithium-Ion Batteries

“…24,42 Additionally, some studies show that materials with different electron adsorption ability (work function differences) maybe generate built-in electric fields to accelerate charge transfer. 43 Consequently, even at a high current density of 1 A g −1 (Figure S7), Si&AG can consistently maintain a reversible capacity of approximately 200 mAh g −1 over 500 cycles, but the Si/AG can only maintain a negligible capacity of 27.4 mAh g −1 .…”

“…This is attributed to the strong anchoring effect of SiC on Si, ensuring minimal detachment of Si from the electrode and facilitating effective utilization of Si’s high capacity and AG’s excellent conductivity. Simultaneously, SiC can acts as an intermediate layer between Si and graphite, guaranteeing stable electrical contact and promoting efficient charge transfer. , Additionally, some studies show that materials with different electron adsorption ability (work function differences) maybe generate built-in electric fields to accelerate charge transfer . Consequently, even at a high current density of 1 A g –1 (Figure S7), Si&AG can consistently maintain a reversible capacity of approximately 200 mAh g –1 over 500 cycles, but the Si/AG can only maintain a negligible capacity of 27.4 mAh g –1 .…”