Materials Letters ( IF 2.7 ) Pub Date : 2023-03-15 , DOI: 10.1016/j.matlet.2023.134232
Hua Yao , Xiaolin Bao , Sidi Ye , Siqi Sheng , Qian Chen , Lili Meng , Jing Yang
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Vanadium oxides are promising cathode materials for Zn-ion batteries. However, they are always suffered from inferior performance because of intrinsic sluggish kinetics, poor conductivity and surface elements dissolution. In this work, porous composite of V2O3 nanoparticles embedded in carbon framework is fabricated by pyrolysis of a Vanadium-base MOF. Attributing to the abundant pores, high specific area and conductive carbon framework, the obtained hierarchical composite delivers a high specific capacity of 240 mAh g−1 at 0.5 A g−1 although the content of carbon is up to 50%, and exhibits a good rate performance with 86.6% retention when the current densities increased from 0.5 to 4 A g−1. Moreover, the cycling performance of the composite is much better than that of commercial V2O3.
中文翻译:

V-MOF衍生的多孔V2O3/C复合电极具有先进的锌离子电池性能
钒氧化物是很有前途的锌离子电池正极材料。然而,由于固有的动力学缓慢、导电性差和表面元素溶解,它们总是性能较差。在这项工作中,通过钒基 MOF 的热解制备了嵌入碳骨架中的V 2 O 3纳米粒子的多孔复合材料。归因于丰富的孔隙、高比表面积和导电碳骨架,所获得的多级复合材料在 0.5 A g -1下提供了 240 mAh g -1的高比容量,尽管碳含量高达 50%,并表现出良好的性能。当电流密度从 0.5 增加到 4 A g −1时,保留率为 86.6% 的倍率性能. 此外,该复合材料的循环性能远优于商用V 2 O 3。