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>Polyacetylene carbon materials: facile preparation using AlCl3 catalyst and excellent electrochemical performance for supercapacitors
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Polyacetylene carbon materials: facile preparation using AlCl3 catalyst and excellent electrochemical performance for supercapacitors
Polyacetylene (PA) was synthesized for the first time under mild conditions via polymerization of acetylene in n -octane with AlCl _(3) as a catalyst, whereby a series of PA-derived carbon materials were obtained. Their composition and structure were characterized and their electrochemical performance was evaluated systematically. It is found that acetylene gas at 1 MPa can polymerize explosively at room temperature under catalysis of AlCl _(3) , forming acetylene black-like PA and a great amount of H _(2) , while in the presence of n -octane solvent, acetylene polymerizes smoothly at higher temperature (30 to 300 °C), forming PA with a H(CHCH) _( n ) H structure. A series of PA-derived carbon materials are obtained by treating PA with KOH at 800 °C. The as-synthesizzed PA-100–KOH exhibits a high specific surface area (～2500 m ~(2) g ~(?1) ), high specific capacitance (241 F g ~(?1) at a current density of 0.1 A g ~(?1) and 143 F g ~(?1) at 5 A g ~(?1) ), low AC resistance, and good cycling stability with 91.7% maintenance of capacity after 2000 cycles at a current density of 2 A g ~(?1) . This paper provides a new method for the facile synthesis of PA and a novel carbon source for supercapacitor electrode materials with excellent electrochemical performance and practical application.
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机译：通过在正辛烷中乙炔在AlCl_（3）的催化下聚合，在温和条件下首次合成聚乙炔（PA），从而获得了一系列PA衍生的碳材料。对它们的组成和结构进行了表征，并对其电化学性能进行了系统评价。研究发现，在正辛烷溶剂存在下，AlCl _（3）催化下，常压下1 MPa的乙炔气体可在室温下爆炸聚合，形成乙炔黑状PA和大量的H _（2）。 ，乙炔在较高温度（30至300°C）下平稳聚合，形成具有H（CHCH）_（n）H结构的PA。通过在800°C下用KOH处理PA，可以获得一系列PA衍生的碳材料。合成后的PA-100-KOH具有高比表面积（〜2500 m〜（2）g〜（？1）），高比电容（241 F g〜（？1），电流密度为0.1 A g〜（？1）和143 F g〜（？1）在5 A g〜（？1）时），低交流电阻和良好的循环稳定性，在2 A的电流密度下2000次循环后保持91.7％的容量g〜（？1）。本文提供了一种简便的合成PA的新方法，以及一种具有优异电化学性能和实际应用的新型超级电容器电极材料碳源。
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