Morphology-dependent metal-organic frameworks via solvent and Co ion effect for high performance battery-supercapacitor hybrid device

IF 6.7 2区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Materials Today Chemistry Pub Date : 2024-07-21 DOI:10.1016/j.mtchem.2024.102198

Fei Zhou, Guangjun Liu, Changfu Zhuang, Ying Wang, Di Tian

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引用次数: 0

Abstract

MOFs have been widely recognized in battery-supercapacitor hybrid devices. Here, the electrochemical performance of Ni MOF as a battery-type material was primarily improved by morphological engineering based on solvent and Co ions. Varying the solvent type, solvent ratio, and Ni/Co ratio, NiCo(1:0.5)MOF HO showed the largest specific capacitance of 1225.56 F g (specific capacity of 551.50 C g) at 0.5 A g, owing to its largest specific surface and good redox activity caused by the difference in the solvent solubility, solvent polarity and coordination ability of metal ions. Furthermore, a solid-state battery-supercapacitor hybrid device was assembled, serving NiCo(1:0.5)MOF HO and active carbon material obtained from bamboo as the positive and negative electrodes, separately. At a power density of 750.00 W kg, this device emerged with a large energy density of 108.96 Wh kg. After 5000 cycles, it can maintain 89.09 % of the initial value. Notably, this device could furnish energy for the LED emitting, reflecting a giant application potential.

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通过溶剂和 Co 离子效应实现形态依赖性金属有机框架，用于高性能电池-超级电容器混合装置

MOFs 在电池-超级电容器混合装置中已得到广泛认可。本文主要通过基于溶剂和 Co 离子的形态学工程改善了镍 MOF 作为电池型材料的电化学性能。随着溶剂类型、溶剂比例和镍/钴比例的变化，镍钴(1:0.5)MOF HO 在 0.5 A g 时的比电容最大，达到 1225.56 F g（比容量为 551.50 C g），这是由于溶剂溶解度、溶剂极性和金属离子配位能力的不同导致了其最大的比表面和良好的氧化还原活性。此外，还分别以 NiCo(1:0.5)MOF HO 和从竹子中提取的活性碳材料为正负极，组装了固态电池-超级电容器混合装置。当功率密度为 750.00 W kg 时，该装置的能量密度高达 108.96 Wh kg。在循环使用 5000 次后，它仍能保持初始值的 89.09%。值得注意的是，该装置可为 LED 发光提供能量，具有巨大的应用潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Today Chemistry Multiple-

CiteScore

8.90

自引率

6.80%

发文量

596

审稿时长

33 days

期刊介绍： Materials Today Chemistry is a multi-disciplinary journal dedicated to all facets of materials chemistry. This field represents one of the fastest-growing areas of science, involving the application of chemistry-based techniques to the study of materials. It encompasses materials synthesis and behavior, as well as the intricate relationships between material structure and properties at the atomic and molecular scale. Materials Today Chemistry serves as a high-impact platform for discussing research that propels the field forward through groundbreaking discoveries and innovative techniques.