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Facile Preparation of Interlocked Fe2O3/MOF Composite for Boosted Rate and Cycle Performance of Lithium-Ion Batteries
journal contributionposted on 2023-06-12, 16:42 authored by Lei Su, Yingnan Hua, Fan Yang, Zhi Chen, Zhichun Yang, Xinmiao Liang, Cheng Zhang, Gang Liu, Bing Chen
Iron oxide (Fe2O3) is emerging as a potential anode alternative for lithium-ion batteries (LIBs) due to the merits of high specific capacity, environmental friendliness, and cost-effectiveness. However, trapped by unsatisfactory cycling stability and rate capability, further modification is needed for Fe2O3 to achieve practical requirements. In this study, a Fe2O3-based composite anode (namely Fe2O3@HA-Fe-BPDC) with interlocked structure was designed and synthesized for pursuing enhanced electrochemical properties. Benefiting from the porous structure, abundant active sites, and good tolerance to volume expansion, the as-prepared electrode exhibits significantly boosted rate capability, excellent specific capacity, and satisfactory reversibility. Typically, the Fe2O3@HA-Fe-BPDC anode provided an excellent specific capacity of 708 mAh g–1 at 0.1 A g–1 and remained at a high level of 332 mAh g–1 at 1 A g–1, delivering significantly improved rate performance than Fe2O3. Additionally, outstanding capacity retention (95.4%) was achieved at 1 A g–1 after 600 charge/discharge cycles. The strategy based on the facile coprecipitation for fabricating Fe2O3 and MOF composite electrodes provides a feasible technique to develop a high-performance anode for LIBs.
unsatisfactory cycling stabilityoutstanding capacity retentionexcellent specific capacityachieve practical requirementsabundant active sitespotential anode alternative708 mah g332 mah g3 sub2 subhigh specific capacitybpdc anode providedperformance anodevolume expansionstrategy basedsatisfactory reversibilityrate capabilityporous structureion batteriesinterlocked structurehigh levelgood tolerancefeasible techniquefacile preparationfacile coprecipitationenvironmental friendlinessdischarge cyclescycle performanceboosted rate600 charge4 %)