Abstract
? 2022 Elsevier B.V.In this study, Fe2O3 with oxygen vacancies (OVs) introduced by Ti doping is partially wrapped by reduced graphene oxide (rGO), and then grown directly on carbon cloth (CC) to obtain a self-supported electrode with hierarchical structures (Ti-Fe2O3@rGO/CC). Compared with Fe2O3 nanosheets, Ti-doped Fe2O3 nanosheets show better lithium storage performance because the existence of OVs can not only promote faster charge transfer kinetics but also help to maintain the integrity of electrode structure and improve the electrochemical activity. Especially, the rGO sheets are partially wrapped on Ti-Fe2O3, inhibiting the agglomeration of components and shortening the diffusion distance of Li+, to obtain better cycle stability. Moreover, it can also provide a buffer to alleviate the volume expansion, avoid the excessive growth of SEI film, and ensure that OVs can maximize their advantages under deep discharge conditions. The Ti-Fe2O3@rGO/CC electrode delivers a high capacity of 1193 mAh g?1 (3.245 mAh cm?2) at 200 mA g?1, showing great potential as an anode material for lithium-ion batteries.
NSTL
Elsevier