高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (2): 310-318.doi: 10.7503/cjcu20170349

• 物理化学 • 上一篇    下一篇

用金属生物大分子配合物前驱体制备多孔碳球及其电化学性能

张保海1, 罗民1(), 杨顺1, 付蓉蓉1, 马金福2   

  1. 1. 宁夏大学化学化工学院, 省部共建煤炭高效利用和绿色化工国家重点实验室, 银川 750021
    2. 北方民族大学材料科学与工程学院, 银川 750021
  • 收稿日期:2017-06-06 出版日期:2018-02-10 发布日期:2017-12-05
  • 作者简介:联系人简介: 罗 民, 男, 博士, 教授, 主要从事多孔功能材料及其储能研究. E-mail: martinluomin@163.com
  • 基金资助:
    国家自然科学基金(批准号: 21361020, 21561026)、 宁夏国内一流学科建设化学工程与技术学科项目(批准号: NXYLXK2017A04)和省部共建“粉体材料与特种陶瓷”重点实验室开放课题研究基金(批准号: 1503)资助

Preparation and Electrochemical Properties of Hierarchically Porous Carbon Microspheres Derived from Metal Phenolic Precursor

ZHANG Baohai1, LUO Min1,*(), YANG Shun1, FU Rongrong1, MA Jinfu2   

  1. 1. State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,School of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 750021, China
    2. School of Materials and Engineering, Beifang University of Nationalities, Yinchuan 750021, China
  • Received:2017-06-06 Online:2018-02-10 Published:2017-12-05
  • Contact: LUO Min E-mail:martinluomin@163.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21561026, 21361020), the National First-rate Discipline Construction Project of Ningxia(Chemical Engineering and Technology)(No.NXYLXK2017A04) and the Open Research Fund of Key Laboratory of Powder Materials & Special Ceramics of Beifang University of Nationalities, China(No.1503)

摘要:

以天然生物大分子鞣花酸(EA)为有机配体, Zn(CH3COO)2·2H2O为锌源, N-甲基吡咯烷酮为溶剂, 在室温下经超分子自组装形成金属生物大分子配合物(ZnEA)前驱体, 再经碳化制备了分级多孔碳球. 研究了不同碳化温度和酸洗处理过程对多孔碳球的结构、 形貌、 比表面积和电化学储能的影响. 结果表明, 在惰性气氛下, 1000 ℃下碳化制备的多孔碳材料(C-ZnEA-1000)的比表面积高达1238 m2/g, 最可几孔径分布约为4 nm; 在6 mol/L KOH电解液中, 扫描速率为5 mV/s时比电容为216 F/g. 当扫描速率由5 mV/s增加到100 mV/s时, 其比电容保持率为84.67%, 显示了优异的倍率特性. 在1 A/g的电流密度下, 经过5000周充放电循环后比电容的损失仅为3%, 具有优异的循环稳定性.

关键词: 金属生物大分子配合物, 超分子自组装, 鞣花酸, 分级多孔碳球, 超级电容器

Abstract:

A hierarchically porous carbonmircrosphere material was prepared by direct carbonization of metal biological macromolecular complex precursor, which was supramolecular self-assembledby zinc(Zn) ions coordinated to ellagic acid(EA). The microstructure and electrochemical properties of as-obtained carbon microspheres were studied by means of TG, FTIR, Raman, XRD, SEM, TEM and electrochemical test. The results show that carbonization temperature plays an important role in determining the structure, specific surface area and electrochemical performance of the carbon microsphere electrode materials. Carbonization at 1000 ℃ under nitrogen produced a micro-mesoporous carbonaceous microsphere material exhibiting lamellar graphene-like structure and high specific surface area of 1238 m2/g, and achieves a specific capacitance of 216 F/g at a scan rate of 5 mV/s in 6 mol/L KOH electrolyte. When the scan rate increased from 5 mV/s to 100 mV/s, the specific capacitor remained 84.67%. Moreover, the porous carbon shows less than 3% decay in specific capacitance values over 5000 cycles at a current density of 1 A/g. The porous carbon microsphere material has excellent electrochemical performance as an electrode material for supercapacitor.

Key words: Metal biological macromolecular complex, Supramolecular self-assembly, Ellagic acid, Hierarchically porous carbon, Supercapacitor

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