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Simple reductive synthesis of a novel mixed-lanthanide metal–organic framework with excellent cycling ability as a binder-free supercapacitor electrode
Materials Letters ( IF 3 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.matlet.2020.128715
Fan Xia , Shuai Kang , Fengjuan Xue , Xiaodan Bu

Abstract In this work, a novel mixed-lanthanide metal–organic framework (ML-MOF, ML = La3+, Gd3+ and Tm3+) is synthesized for the first time through a simple reductive electrodeposition procedure onto nickel foam and its charge storage ability is investigated. The as-prepared ML-MOF is characterized through FE-SEM, EDS, XRD, FT-IR and TGA analyses. The results of these analyses confirmed deposition of the crystalline well-defined rod-like ML-MOF with composition of {La2Gd0.5Tm0.5 BTC]. xH2O}n onto Ni foam. The fabricated ML-MOF/NF electrode delivered specific capacity values of 965F g−1 and 594 F g−1 at 5 and 50 A g−1, and capacity retention of 94.5% after 6000 cycles at high current load of 5 A g−1, which confirmed its superior rate ability and excellent cycling performance. Based on the results, the applied electrochemical strategy is introduced as a simple facile way for synthesis of various ML-MOF materials for different electrochemical applications.

中文翻译:

一种具有优异循环能力的新型混合镧系金属-有机骨架的简单还原合成作为无粘合剂超级电容器电极

摘要 在这项工作中,首次通过简单的还原电沉积方法在镍泡沫上合成了一种新型的混合镧系金属有机骨架(ML-MOF,ML = La3+,Gd3+ 和 Tm3+),并研究了其电荷存储能力。所制备的 ML-MOF 通过 FE-SEM、EDS、XRD、FT-IR 和 TGA 分析进行表征。这些分析的结果证实了具有{La2Gd0.5Tm0.5 BTC]组成的结晶明确的棒状ML-MOF的沉积。xH2O}n 到泡沫镍上。所制造的 ML-MOF/NF 电极在 5 A g-1 和 50 A g-1 时的比容量值分别为 965F g-1 和 594 F g-1,并且在 5 A g-1 的高电流负载下循环 6000 次后容量保持率为 94.5%。 1,证实了其优越的倍率能力和优异的循环性能。根据结果​​,
更新日期:2021-01-01
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