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首页> 外文期刊>RSC Advances >Fabrication of N-doped and shape-controlled porous monolithic carbons from polyacrylonitrile for supercapacitors
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Fabrication of N-doped and shape-controlled porous monolithic carbons from polyacrylonitrile for supercapacitors

机译：用于超级电容器聚丙烯腈的N掺杂和形状控制多孔整体碳的制造

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摘要

N-doped porous monolithic carbons (PMC) have been developed from polyacrylonitrile (PAN) via a template-free thermally induced phase separation (TIPS) approach followed by an easy pyrolysis process. Three-dimensional (3D) PAN monolith (PM) was firstly fabricated as the starting material. The shape of the 3D PM was designed during the phase separation step, revealing that the product carbons had the potential advantages of desired porosity and controllable shape. Two typical activation methods were employed and compared to prepare PMC. KOH-activated PMC showed a larger surface area of 1600 m(2) g(-1) and higher nitrogen content of 5.6% in comparison to that being activated in a carbon dioxide atmosphere (CD-PMC). The electrochemical measurements revealed that PMC possessed a high capacitance of 270 F g(-1) at 0.2 A g(-1) and 195 F g(-1) even at 100 A g(-1), ultra-high rate capability with 72% capacitance retention from 0.2 to 100 A g(-1) and outstanding cycling stability with 100% capacitance retention at 20 A g(-1) after 5000 cycles. These results demonstrate that the present facile and efficient synthetic strategy for PMC from PAN can benefit the promotion of its application in energy storage devices and it is highly likely to be extended to other polymer sources.
机译：通过无丙烯腈（PAN）通过无模板的热诱导的相分离（提示）方法，采用N-掺杂的多孔整体碳（PMC），然后是易于热解过程。首先制造三维（3D）平移整体（PM）作为原料。在相分离步骤期间设计了3D PM的形状，揭示了产品碳的孔隙率和可控形状的潜在优点。使用两种典型的活化方法，并与制备PMC进行比较。 KOH活化的PMC显示出1600m（2）克（-1）的较大表面积，并且与在二氧化碳气氛（CD-PMC）中激活相比，氮含量较高为5.6％。电化学测量表明，即使在100A G（-1），超高速率能力，PMC在0.2Ag（-1）和195f g（-1）中具有高电容为270 f g（-1）的高电容。 72％电容保留0.2至100 A g（-1），并在5000次循环后20A g（-1）下具有100％电容保留的优异循环稳定性。这些结果表明，来自PAN的PMC的本发明的易于和有效的合成策略可以使其在储能装置中的应用促进，并且很可能扩展到其他聚合物来源。

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  • 来源
    《RSC Advances》 |2017年第68期|共9页
  • 作者

    Shu Yu; Maruyama Jun; Iwasaki Satoshi; Maruyama Shohei; Shen Yehua; Uyama Hiroshi;

  • 作者单位

    Osaka Univ Grad Sch Engn Dept Appl Chem Suita Osaka 5650871 Japan;

    Osaka Res Inst Ind Sci &

    Technol Res Div Environm Technol Joto Ku 1-6-50 Morinomiya Osaka 5368553 Japan;

    Osaka Res Inst Ind Sci &

    Technol Res Div Environm Technol Joto Ku 1-6-50 Morinomiya Osaka 5368553 Japan;

    Osaka Res Inst Ind Sci &

    Technol Res Div Environm Technol Joto Ku 1-6-50 Morinomiya Osaka 5368553 Japan;

    Northwest Univ Key Lab Synthet &

    Nat Funct Mol Chem Coll Chem &

    Mat Sci Minist Educ Xian 710127 Shaanxi Peoples R China;

    Osaka Univ Grad Sch Engn Dept Appl Chem Suita Osaka 5650871 Japan;

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  • 正文语种 eng
  • 中图分类 化学;
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