海藻酸钠修饰LDH制备多孔炭及其电化学性质
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O646.1;O646.54

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国家自然科学基金项目(面上项目,重点项目,重大项目)


Textural and electrochemical properties of carbon replicated from biopolymer-modified layered double hydroxide
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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    研究分别以Mg-Al-LDH,Zn-Cr-LDH和Mg-Cr-LDH为模板,海藻酸钠为前驱体在600℃下炭化制备的多孔炭发现,多孔炭的BET比表面积从173m2/g增加到497m2/g,而海藻酸钠自身炭化所得多孔炭的比表面积仅为95m2/g。电化学研究表明,以Mg-Cr-LDH为模板制备的多孔炭(PC-4)电极的循环伏安曲线图形更接近矩形,阴极和阳极过程基本对称;在恒电流充放电实验中,50mA/g的电流密度下PC-4电极的电容为92F/g且电流密度为500mA/g时充放电循环1000次后电容损失小于1%。比表面积、孔结构和电化学研究表明,海藻酸钠修饰LDH制备的多孔炭具有作为超级电容器电极材料的潜在价值。

    Abstract:

    Porous carbon samples were prepared by carbonization of alginate biopolymer and alginate-modified layered double hydroxides (LDHs) and characterized using physisorption of nitrogen at liquid-nitrogen temperature, cyclic voltammogram (CV), and galvanostatic charge-discharge techniques. The porous carbon electrode made from seaweed biopolymer-modified Mg-Cr-LDH displayed a rectangular shape and symmetrical anode and cathode processes with a specific capacitance of 92F/g derived from the galvanostatic charge-discharge curve at a current density of 50mA/g. The sample also showed a good stability and capacitance retainability with the capacitance decreased less than 1% after 1000 cycles at a current density of 500mA/g. The experimental results showed that porous carbon derived from alginate-modified layered double hydroxides is a potential supercapacitor electrode.

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季倩倩,郭培志. 海藻酸钠修饰LDH制备多孔炭及其电化学性质[J]. 科学技术与工程, 2010, (2): .
Ji Qianqian, Guo Peizhi. Textural and electrochemical properties of carbon replicated from biopolymer-modified layered double hydroxide[J]. Science Technology and Engineering,2010,(2).

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  • 收稿日期:2009-10-10
  • 最后修改日期:2009-10-10
  • 录用日期:2009-10-13
  • 在线发布日期: 2010-01-19
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