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Template-free synthesis of nitrogen doped carbon materials from an organic ionic dye (murexide) for supercapacitor application

机译:基于有机离子染料(Murexide)的无有机离子染料碳材料的无模块合成超级电容器应用

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摘要

The present study describes a template-free single step carbonization route to prepare hierarchically structured nitrogen-doped carbon materials (NCMs) by using an organic ionic dye (OID), ammonium purpurate (murexide). These NCMs exhibited moderate specific surface area (307 m(2) g(-1) for NCM(MDE)-900) and hierarchical macro/meso/microporous structures with abundant nitrogenous functionalities that contributed towards the high specific capacitance displayed by pseudocapacitive contribution. In particular, the NCM(MDE)-800 displayed superior specific capacitance (222 F g(-1) at 3 A g(-1)) and excellent cyclic stability of similar to 10 000 cycles at 10 A g(-1) in 1 M 1.0 M H2SO4(aq). The material prepared at higher temperature, viz. NCM(MDE)-900, exhibited high rate capability at 50 A g(-1), which is 92% of their specific capacitances at 10 A g(-1). Further systematic investigations of NCM(MDE)-800 in three different electrolytes, viz. 1.0 M H2SO4(aq), 6 M KOH(aq) and 0.5 M Na2SO4(aq), revealed that 1.0 M H2SO4(aq) is a promising electrolyte for achieving good specific capacitance, high capacitive retention and long term cyclic stability, which might have its origins in the formation of ionic interactions between the active protons in 1.0 M H2SO4(aq) and the alpha carbon atoms with Lewis basic character next to the nitrogen in these NCMs.
机译:本研究描述了通过使用有机离子染料(Oid),铵丙酸盐(Murexide)制备分层结构的氮掺杂碳材料(NCMS)的无模板上的单步碳化途径。这些NCMS表现出适量的NCM(MDE)-900)和分层宏/ MESO /微孔结构的适度比表面积(307M(2)G(-1),具有丰富的含氮功能,这些结构促进了假偶联贡献所显示的高特定电容。特别地,NCM(MDE)-800显示出优异的特定电容(222 f G(-1),在3Ag(-1))中,并且在10 a g(-1)时的优异循环稳定性为10 000个循环1m 1.0 m H 2 SO 4(AQ)。在较高温度下制备的材料,viz。 NCM(MDE)-900,在50Ag(-1)时表现出高速率能力,其特定电容的92%在10 A G(-1)中。在三种不同电解质中的NCM(MDE)-800的进一步系统研究。 1.0M H 2SO4(AQ),6M KOH(AQ)和0.5M Na 2 SO 4(AQ),显示1.0M H 2 SO 4(AQ)是实现良好的特定电容,高电容性保留和长期循环稳定性的有希望的电解质在1.0MH2SO4(aq)中的活性质子和α碳原子与氮气在这些NCMS中的氮气旁边的α碳原子之间形成离子相互作用。

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  • 来源
    《RSC Advances》 |2017年第86期|共12页
  • 作者单位

    Quaid I Azam Univ Dept Chem Islamabad Pakistan;

    King Saud Univ Coll Engn Sustainable Energy Technol SET Ctr POB 800 Riyadh 11421 Saudi Arabia;

    Quaid I Azam Univ Dept Chem Islamabad Pakistan;

    King Saud Univ Coll Engn Sustainable Energy Technol SET Ctr POB 800 Riyadh 11421 Saudi Arabia;

    King Saud Univ Coll Engn Chem Engn Dept POB 800 Riyadh 11421 Saudi Arabia;

    King Saud Univ Coll Engn Chem Engn Dept POB 800 Riyadh 11421 Saudi Arabia;

    Univ Liverpool Dept Chem Stephenson Inst Renewable Energy Liverpool L69 7ZF Merseyside England;

    Univ Liverpool Dept Chem Stephenson Inst Renewable Energy Liverpool L69 7ZF Merseyside England;

    Univ Liverpool Dept Chem Stephenson Inst Renewable Energy Liverpool L69 7ZF Merseyside England;

    Univ Liverpool Dept Chem Stephenson Inst Renewable Energy Liverpool L69 7ZF Merseyside England;

    Univ Liverpool Dept Chem Stephenson Inst Renewable Energy Liverpool L69 7ZF Merseyside England;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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