金属有机骨架<strong>Zn-BTC/rGO</strong>复合材料的制备和性能

doi:10.11901/1005.3093.2023.446

材料研究学报

2024, Vol. 38

Issue (8): 576-584 DOI: 10.11901/1005.3093.2023.446

研究论文

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金属有机骨架Zn-BTC/rGO复合材料的制备和性能

谭上荣, 姚焯(

), 刘泽辰, 蒋奕蕾, 郭诗琪, 李丽丽

辽宁科技大学材料与冶金学院鞍山 114051

Fabrication and Performance of Metal Organic Framework Zn-BTC/rGO Nanocomposites

TAN Shangrong, YAO Zhuo(

), LIU Zechen, JIANG Yilei, GUO Shiqi, LI Lili

College of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China

引用本文:

谭上荣, 姚焯, 刘泽辰, 蒋奕蕾, 郭诗琪, 李丽丽. 金属有机骨架Zn-BTC/rGO复合材料的制备和性能[J]. 材料研究学报, 2024, 38(8): 576-584.
Shangrong TAN, Zhuo YAO, Zechen LIU, Yilei JIANG, Shiqi GUO, Lili LI. Fabrication and Performance of Metal Organic Framework Zn-BTC/rGO Nanocomposites[J]. Chinese Journal of Materials Research, 2024, 38(8): 576-584.

全文: PDF(8033 KB) HTML

摘要:

用超声震荡法合成不同形貌的石墨烯负载Zn-BTC金属有机骨架材料，并将其用做电极组装超级电容器。用TG曲线、SEM观察、XRD谱、Brunauer-Emmett-Teller模型和Raman谱等手段表征材料的结构、形貌和电化学性能，使用电化学工作站和三电极体系测试了超级电容样品的电化学性能。结果表明，合成的一维棒状Zn-BTC均匀锚定在褶皱的石墨烯纳米片层上，其比电容为182.4 C·g^-1 (1 A·g^-1)，优于石墨烯负载的二维片状Zn-BTC (139.3 C·g^-1)、石墨烯(97.9 C·g^-1)和一维棒状Zn-BTC (62.8 C·g^-1)。使用石墨烯负载的一维棒状Zn-BTC组装的对称超级电容器，在电流密度为1 A·g^-1、比容量为57.7 F·g^-1、功率密度为1390 W·kg^-1条件下的最大能量密度为1.99 Wh·kg^-1，经过2000次充放电循环后其比容量保持率为90.3%。

关键词 ：复合材料, 金属有机骨架, Zn-BTC, 石墨烯, 超级电容器

Abstract：

As electrode material for supercapacitors, graphene-supported Zn-BTC metal-organic framework materials (Zn-BTC/rGO) with different morphologies were synthesized via a simple ultrasonic vibration method. The prepared Zn-BTC/rGO materials were characterized by means of TG, SEM, XRD, BET, Raman and electrochemical workstation in terms of the structure, morphology and electrochemical property. Their capacitance performance was examined by a three-electrode system. The results show that the synthesized one-dimensional rod-like Zn-BTC is uniformly anchored to the wrinkled layer of graphene nanosheets, and the material exhibits excellent capacitance performance, with a specific capacitance of 182.4 C·g^-1 (1 A·g^-1), which is better than the graphene-supported two-dimensional sheet-like Zn-BTC (139.3 C·g^-1), graphene (97.9 C·g^-1) and simple one-dimensional rod-like Zn-BTC (62.8 C·g^-1). A symmetrical supercapacitor was assembled with the graphene supported one-dimensional rod-shaped Zn-BTC, which presents excellent performance: the specific capacity of 57.7 F·g^-1 at a current density of 1 A·g^-1, the maximum energy density of 1.99 Wh·kg^-1 at a power density of 1390 W·kg^-1, and the specific capacity retention rate of 90.3% after 2000 charge-discharge cycles.

Key words： composite metal organic framework Zn-BTC graphene supercapacitor

收稿日期: 2023-09-08

ZTFLH:

TB332

基金资助:辽宁省教育厅高等院校科研项目(LJKZ0290)

通讯作者: 姚焯，副教授，yaozhuo1986@163.com，研究方向为金属有机骨架储能材料

Corresponding author: YAO Zhuo, Tel: 13029368800, E-mail: yaozhuo1986@163.com

作者简介: 谭上荣，男，2000年生，硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2023.446 或 https://www.cjmr.org/CN/Y2024/V38/I8/576

图1 制备Zn-BTC/rGO复合材料的示意图

图2 rGO，Zn-BTC-1D，Zn-BTC/rGO-1D和Zn-BTC/rGO-2D的SEM照片

图3 rGO、Zn-BTC-1D、Zn-BTC/rGO-1D和Zn-BTC/rGO-2D样品的XRD谱

图4 rGO，Zn-BTC/rGO-1D，Zn-BTC/rGO-2D，Zn-BTC-1D样品的Raman谱

图5 Zn-BTC-1D和Zn-BTC/rGO-1D样品的TG曲线

图6 使用三电极在3 mol/L KOH电解质中Zn-BTC/rGO-1D电极样品的GCD曲线和比容量

图7 使用三电极体系在3 mol/L KOH电解质中Zn-BTC/rGO-1D在不同扫描速率(2~100 mV·s-1)时的CV曲线和比容量、CV曲线中峰A和峰B的lg(i)和lg(v)之间的线性关系、在20 mV·s-1下将储存贡献与电容行为和扩散控制过程分开以及在不同扫描速率下电容行为和扩散控制过程的贡献比

图8 rGO、Zn-BTC/rGO-1D、Zn-BTC/rGO-2D和Zn-BTC-1D电极的Nyquist图和电流密度为1 A·g-1下1000次充放电循环的比容量和容量保持率

图9 Zn-BTC/rGO-1D组装对称超级电容器器件的CV曲线、充放电曲线、比容量、循环稳定性、Nyquist图以及能量密度与功率密度的关系

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