<strong>MOFs</strong>衍生<strong>C/LDH/rGO</strong>网状复合材料构筑高比容量水系锌离子电容器

doi:10.11901/1005.3093.2024.328

材料研究学报

2025, Vol. 39

Issue (5): 371-376 DOI: 10.11901/1005.3093.2024.328

研究论文

本期目录 | 过刊浏览

MOFs衍生C/LDH/rGO网状复合材料构筑高比容量水系锌离子电容器

刘艳云¹(

), 王娜¹, 张志华², 白文¹, 刘云洁¹, 陈勇强³, 李万喜¹, 李瑀¹

^1.晋中学院材料科学与工程系晋中 030619
^2.太原海关技术中心太原 030006
^3.晋中学院化学与化工系晋中 030619

MOFs Derived C/LDH/rGO Network Composite Materials for High Specific Capacity High-performance Aqueous Zinc Ion Capacitors

LIU Yanyun¹(

), WANG Na¹, ZHANG Zhihua², BAI Wen¹, LIU Yunjie¹, CHEN Yongqiang³, LI Wanxi¹, LI Yu¹

^1.Department of Materials Science and Engineering, Jinzhong University, Jinzhong 030619, China
^2.Customs Technology Center of Taiyuan, Taiyuan 030006, China
^3.Department of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong 030619, China

引用本文:

刘艳云, 王娜, 张志华, 白文, 刘云洁, 陈勇强, 李万喜, 李瑀. MOFs衍生C/LDH/rGO网状复合材料构筑高比容量水系锌离子电容器[J]. 材料研究学报, 2025, 39(5): 371-376.
Yanyun LIU, Na WANG, Zhihua ZHANG, Wen BAI, Yunjie LIU, Yongqiang CHEN, Wanxi LI, Yu LI. MOFs Derived C/LDH/rGO Network Composite Materials for High Specific Capacity High-performance Aqueous Zinc Ion Capacitors[J]. Chinese Journal of Materials Research, 2025, 39(5): 371-376.

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摘要:

设计并合成了具有自支撑特性的MOFs衍生C/LDH/rGO网状复合材料，使用X射线衍射谱，扫描电子显微镜，X射线光电子能谱表征其结构和形貌。结果表明：这种MOFs衍生C/Ni-Co LDH为颗粒状结构，分散在rGO的片层中，形成了网状复合材料。用这种材料组装的锌离子电容器电流密度为1.0 A·g^-1时比容量为248 F·g^-1，循环1500次后电容保留率为97.1%。其原因是，这种复合材料中的MOFs衍生C/LDH/rGO网状结构，为电解液中的离子提供了大量的传输通道和赝电容活性位点。

关键词 ：复合材料, 锌离子电容器, 水热法, 能量密度

Abstract：

Aqueous Zn ion hybrid capacitors (ZICs), as an emerging energy storage device with low cost, high operational safety and low redox potential, have become a research hotspot in the field of energy storage. This paper focuses on the important research of low energy density of capacitor electrode materials in ZICs. Metal-organic frameworks (MOFs)-derived carbon (C)/layered double hydroxides (LDH)/graphene (rGO) network composite materials with self-supporting characteristics are designed and synthesized. The structure and morphology of the material were characterized by X-ray diffractometer, scanning electron microscope and X-ray photoelectron spectroscopy. The results showed that the MOFs-derived C/ Ni-Co LDH particles were granular structure, dispersed on lamellae of the rGO, forming a network composite material. The specific capacitance of the Zn ion capacitor assembled by this material can reach 248 F·g^-1 at a current density of 1.0 A·g^-1, which is much larger than the specific capacitance of rGO (142 F·g^-1). After 1500 cycles, the capacitance retention rate of the Zn ion capacitor is still as high as 97.1%. The network structure not only provides more transmission channels for electrolyte ions, but also provides more pseudocapacitive active sites. The completion of this paper provides some theoretical guidance and practical significance for the development of high specific energy storage devices.

Key words： composite materials zinc ion capacitors hydrothermal method energy density

收稿日期: 2024-07-25

ZTFLH:

TB383

基金资助:山西省基础研究自由探索项目(202103021224307);山西省研究生教育创新计划(2021YJG336);山西省科技创新青年人才团队

通讯作者: 刘艳云，副教授，312217642@qq.com，研究方向为储能材料与新型储能装置

Corresponding author: LIU Yanyun, Tel: 15698402116, E-mail: 312217642@qq.com

作者简介: 刘艳云，女，1984年生，博士

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https://www.cjmr.org/CN/10.11901/1005.3093.2024.328 或 https://www.cjmr.org/CN/Y2025/V39/I5/371

图1 MOFs衍生C/LDH/rGO网状复合材料的制备流程

图2 MOFs衍生C/LDH/rGO网状复合材料的XRD谱、SEM图和能谱图

图3 MOFs衍生C/LDH/rGO网状复合材料的XPS谱图

图4 用MOFs衍生C/LDH/rGO网状复合材料组装成的锌离子电容器

图5 用MOFs衍生C/LDH/rGO网状复合材料和rGO分别组装的锌离子电容器性能的对比

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