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基于泡沫镍负载的CdCO/CdO/CoO复合材料的高性能不对称超级电容器——第二部分：三电极电化学研究

High-performance asymmetric supercapacitor based on a CdCO/CdO/CoO composite supported on Ni foam - part II: a three-electrode electrochemical study.

作者信息

Henríquez Rodrigo, Mestra-Acosta Alifhers S, Grez Paula, Muñoz Eduardo, Sessarego Gustavo, Navarrete-Astorga Elena, Dalchiele Enrique A

机构信息

Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso Casilla 4059 Valparaíso Chile

Universidad de Málaga, Departamento de Física Aplicada I, Laboratorio de Materiales y Superficies (Unidad asociada al CSIC) E29071 Málaga Spain.

出版信息

RSC Adv. 2023 Mar 29;13(15):10068-10081. doi: 10.1039/d3ra00499f. eCollection 2023 Mar 27.

DOI:10.1039/d3ra00499f
PMID:37006367
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10052401/
Abstract

A binder-free CdCO/CdO/CoO compound with a micro-cube-like morphology on a nickel foam (NF) made a facile two-step hydrothermal + annealing procedure has been developed. The morphological, structural and electrochemical behavior of both the single compounds constituting this final product and the final product itself has been studied. The synergistic contribution effect of the single compounds in the final compounded resulting specific capacitance values are presented and discussed. The CdCO/CdO/CoO@NF electrode exhibits excellent supercapacitive performance with a high specific capacitance ( ) of 1.759 × 10 F g at a current density of 1 mA cm and a value of 792.3 F g at a current density of 50 mA cm with a very good rate capability. The CdCO/CdO/CoO@NF electrode also demonstrates a high coulombic efficiency of 96% at a current density as high as 50 mA cm and also exhibits a good cycle stability with capacitance retention of 100% after 1000 cycles at a current density of 10 mA cm along with a potential window of 0.4 V. The obtained results suggest that the facilely synthesized CdCO/CdO/CoO compound has great potential in high-performance electrochemical supercapacitor devices.

摘要

通过两步水热+退火简便工艺，在泡沫镍（NF）上制备了一种具有微立方体形貌的无粘结剂CdCO/CdO/CoO复合材料。对构成该最终产物的单一化合物以及最终产物本身的形貌、结构和电化学行为进行了研究。给出并讨论了单一化合物在最终复合产物中对特定电容值的协同贡献效应。CdCO/CdO/CoO@NF电极表现出优异的超级电容性能，在电流密度为1 mA cm时，比电容（ ）高达1.759×10 F g，在电流密度为50 mA cm时，比电容值为792.3 F g，倍率性能良好。CdCO/CdO/CoO@NF电极在电流密度高达50 mA cm时，库仑效率也高达96%，并且在电流密度为10 mA cm、电位窗口为0.4 V的条件下，经过1000次循环后电容保持率为100%，表现出良好的循环稳定性。所得结果表明，简便合成的CdCO/CdO/CoO化合物在高性能电化学超级电容器器件中具有巨大潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ae7f/10052401/1ec42a4f801f/d3ra00499f-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ae7f/10052401/fe34e75ebd12/d3ra00499f-s1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ae7f/10052401/6e71460b6305/d3ra00499f-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ae7f/10052401/20a6a2404b9c/d3ra00499f-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ae7f/10052401/1ec42a4f801f/d3ra00499f-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ae7f/10052401/fe34e75ebd12/d3ra00499f-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ae7f/10052401/a9ea4b44e142/d3ra00499f-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ae7f/10052401/37f520a48186/d3ra00499f-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ae7f/10052401/1d7e633ba471/d3ra00499f-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ae7f/10052401/6e71460b6305/d3ra00499f-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ae7f/10052401/20a6a2404b9c/d3ra00499f-f5.jpg
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