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Hollow Fe3O4/carbon with surface mesopores derived from MOFs for enhanced lithium storage performance
Science Bulletin ( IF 18.9 ) Pub Date : 2019-11-06 , DOI: 10.1016/j.scib.2019.11.004
Qiuying Yi 1 , Mengmeng Du 1 , Bin Shen 1 , Jiahui Ji 1 , Chencheng Dong 1 , Mingyang Xing 1 , Jinlong Zhang 1
Affiliation  

Hollow metal-organic frameworks (MOFs) and their derivatives have attracted more and more attention due to their high specific surface area and perfect morphological structure, which determine their large potential application in energy storage and catalysis fields. However, few researchers have carried out further modification on the outer shell of hollow MOFs, such as the perforation modification, which will endow hollow nanomaterials derived from MOFs with multifunctionality. In this paper, hollow MOFs of MIL-53(Fe) with perforated outer surface are successfully synthesized by using SiO2 nanospheres as the template via a self-assembly process induced by the coordination polymerization. The tightly packed mesopore structure makes the carbon outer shell of MOFs thinner, thus realizing the in-situ transformation from MOFs to hollow Fe3O4/carbon, which exhibits perfect capacity approaching 1270 mA h g–1 even after 200 cycles at 0.1 A g–1, as an anode material in lithium ion batteries (LIBs) application. This research provides a new strategy for the design and preparation of MOFs and their derivatives with multifunctionality for the energy applications.



中文翻译:

具有源自 MOF 的表面中孔的空心 Fe3O4/碳,用于增强锂存储性能

中空金属有机骨架材料(MOFs)及其衍生物由于其高比表面积和完美的形貌结构而受到越来越多的关注,这决定了它们在储能和催化领域的巨大潜在应用。然而,很少有研究人员对中空MOFs的外壳进行进一步修饰,例如穿孔修饰,这将赋予MOFs衍生的中空纳米材料多功能性。本文以SiO 2纳米球为模板,通过配位聚合诱导的自组装过程成功合成了具有穿孔外表面的空心MOFs MIL-53(Fe) 。紧密堆积的中孔结构使 MOFs 的碳外壳更薄,从而实现原位从 MOF 到中空 Fe 3 O 4 /碳的转变,作为锂离子电池 (LIB) 应用中的负极材料,即使在 0.1 A g –1下循环 200 次后,它也表现出接近 1270 mA hg –1的完美容量。该研究为设计和制备具有多功能的MOFs及其衍生物的能源应用提供了新的策略。

更新日期:2019-11-06
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