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首页> 外文期刊>RSC Advances >Sustainable rose multiflora derived nitrogen/oxygen-enriched micro-/mesoporous carbon as a low-cost competitive electrode towards high-performance electrochemical supercapacitors
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Sustainable rose multiflora derived nitrogen/oxygen-enriched micro-/mesoporous carbon as a low-cost competitive electrode towards high-performance electrochemical supercapacitors

机译：可持续玫瑰多叶草衍生的氮气/氧富含微/介孔碳作为低性能电化学超级电容器的低成本竞争电极

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摘要

Cost-efficient carbonaceous materials have been utilized extensively for advanced electrochemical supercapacitors. However, modest gravimetric/volumetric capacitances are the insuperable bottleneck in their practical applications. Herein, we develop a simple yet scalable method to fabricate low-cost micro-/mesoporous N/O-enriched carbon (NOC-K) by using natural rose multiflora as a precursor with KOH activation. The biomass-derived NOC-K is endowed with a large surface area of similar to 1646.7 m(2) g(-1), micro-/mesoporosity with similar to 61.3% microporosity, high surface wettability, and a high content of N (similar to 1.2 at%)/O (similar to 26.7 at%) species. When evaluated as an electroactive material for supercapacitors, the NOC-K electrode (5 mg cm(-2)) yields large gravimetric/volumetric specific capacitances of similar to 340.0 F g(-1) (similar to 238.0 F cm(-3)) at 0.5 A g(-1), and even similar to 200.0 F g(-1) (similar to 140.0 F cm(-3)) at 5.0 A g(-1), a low capacitance decay of similar to 4.2% after 8200 consecutive cycles, and a striking specific energy of similar to 8.3 W h kg(-1) in aqueous KOH electrolyte, benefiting from its intrinsic structural and compositional superiorities. Moreover, a remarkable specific energy of similar to 52.6 W h kg(-1) and similar to 96.6% capacitance retention over 6500 cycles for the NOC-K based symmetric cell are obtained with the organic electrolyte. More promisingly, the competitive NOC-K demonstrates enormous potential towards advanced supercapacitors both with aqueous and organic electrolytes as a sustainable electrode candidate.
机译：用于高级电化学超级电容器的高效地利用了成本效率的碳质材料。然而，适度的重量/体积容量是其实际应用中的可预测的瓶颈。在此，我们通过使用天然玫瑰多叶草作为具有KOH活化的前体来制定简单但可扩展的方法来制造低成本的微/富集N / O富集的碳（NOC-K）。生物质衍生的NOC-k赋予了类似于1646.7m（2）g（-1）的大表面积，微/间孔隙，具有类似于61.3％的微孔，表面润湿性和高含量的n（类似于1.2at％）/ O（类似于26.7at％）物种。当作为超级电容器的电活性物质评估时，NOC-K电极（5mg cm（-2））产生大的重量/体积特异性电容，类似于340.0f f g（-1）（类似于238.0f cm（-3） ）在0.5Ag（-1），甚至类似于200.0f g（-1）（类似于140.0f cm（-3）），在5.0 a g（-1），低电容衰减与4.2％相似在连续8200个连续循环之后，在KOH电解质水溶液中醒目的特异性能量与8.3Wh kg（-1），受益于其内在结构和组成优势。此外，用有机电解质获得类似于52.6WH kg（-1）的显着特异性能量与52.6Wh kg（-1）和类似于6500个循环的96.6％的电容潴留。更承诺的是，竞争性NOC-K对诸如可持续电极候选者的水性和有机电解质来说，竞争性NOC-K展示了高级超级电容器的巨大潜力。

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  • 来源
    《RSC Advances》 |2018年第17期|共11页
  • 作者

    Chen Qiuli; Sun Jinfeng; Wang Zhengluo; Zhao Zhiwei; Zhang Yanru; Liu Yang; Hou Linrui; Yuan Changzhou;

  • 作者单位

    Anhui Univ Technol Sch Mat Sci &

    Engn Maanshan 243002 Peoples R China;

    Univ Jinan Sch Mat Sci &

    Engn Jinan 250022 Shandong Peoples R China;

    Anhui Univ Technol Sch Mat Sci &

    Engn Maanshan 243002 Peoples R China;

    Anhui Univ Technol Sch Mat Sci &

    Engn Maanshan 243002 Peoples R China;

    Anhui Univ Technol Sch Mat Sci &

    Engn Maanshan 243002 Peoples R China;

    Univ Jinan Sch Mat Sci &

    Engn Jinan 250022 Shandong Peoples R China;

    Univ Jinan Sch Mat Sci &

    Engn Jinan 250022 Shandong Peoples R China;

    Univ Jinan Sch Mat Sci &

    Engn Jinan 250022 Shandong Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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