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Controllable one step electrochemical synthesis of PANI encapsulating 3d-4f bimetal MOFs heterostructures as electrode materials for high-performance supercapacitors
Chemical Engineering Journal ( IF 15.1 ) Pub Date : 2021-06-24 , DOI: 10.1016/j.cej.2021.130836
Ping-Ping Sun , Yu-Hang Zhang , Hongwei Shi , Fa-Nian Shi

Two new 3-dimensional (3D) 3d-4f bimetal organic frameworks (ZnCe-MOF and CuCe-MOF) were created through hydrothermal method. These MOFs have the similar formula (M2(imidazole)2Ce(H2O)(C2O4)1/2(4,5-ida)2·2(H2O), M = Zn, Cu; 4,5-ida: 4,5-imidazole dicarboxylate) and possesses monoclinic symmetry in the P21/n space group. The electrodeposition method was used to in-situ coat polyaniline (PANI) to improve the electrical conductivity. As the electrode materials for supercapacitors in three-electrode system, the specific capacitance of CuCe-MOF@PANI-1 and ZnCe-MOF@PANI-1 electrodes can reach 724.4F g−1 and 713.2F g−1 at 1 A g−1. Using the as-synthesized CuCe-MOF@PANI-1 heteorostructure as positive material, the assembled hybrid capacitor delivers an energy density of 87.45 Wh kg−1 and 58.05 Wh kg−1 at power density of 850 W kg−1, demonstrating that the heteorostructure of MOF coated with PANI has promising applications in portable energy storage devices.



中文翻译:

可控一步电化学合成PANI封装3d-4f双金属MOFs异质结构作为高性能超级电容器的电极材料

通过水热法创建了两种新的 3 维(3D)3d-4f 双金属有机骨架(ZnCe-MOF 和 CuCe-MOF)。这些MOFs具有相似的分子式(M 2 (imidazole) 2 Ce(H 2 O)(C 2 O 4 ) 1/2 (4,5-ida) 2 ·2(H 2 O),M = Zn,Cu; 4,5-ida:4,5-咪唑二羧酸酯)并且在P2 1 /n 中具有单斜对称性空间群。电沉积方法用于原位涂覆聚苯胺(PANI)以提高电导率。作为三电极体系中超级电容器的电极材料,CuCe-MOF@PANI-1和ZnCe-MOF@PANI-1电极的比电容在1 A g - 下可达到724.4F g -1和713.2F g -1 1 . 使用合成的 CuCe-MOF@PANI-1 异质结构作为正极材料,组装的混合电容器在 850 W kg -1 的功率密度下提供 87.45 Wh kg -1和 58.05 Wh kg -1的能量密度,证明了涂有 PANI 的 MOF 异质结构在便携式储能设备中具有广阔的应用前景。

更新日期:2021-06-30
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