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A green approach to prepare hierarchical porous carbon nanofibers from coal for high-performance supercapacitors

机译：一种绿色方法，用于制备煤中煤的分层多孔碳纳米纤维高性能超级电容器

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摘要

A green method is designed to obtain hierarchical porous carbon nanofibers from coal. In the work, deionized water, coal, polyvinyl alcohol and Pluronic F127 are used as the aqueous solution, carbon source, spinning assistant and soft template for spinning, respectively. As electrode materials for supercapacitors, the obtained hierarchical porous carbon nanofibers exhibit a high specific capacitance of 265.2 F g(-1) at 1.0 A g(-1) in 6 M KOH, a good rate performance with a capacitance of 220.3 F g(-1) at 20.0 A g(-1) with the retention of 83.1% and a superior cycle stability without capacitance loss after 20 000 charge/discharge cycles at 10.0 A g(-1). Compared with the carbon nanofibers constructed without Pluronic F127, the enhanced electrochemical performance of the sample benefits from a larger contact surface area and the mesoporous structure formed by decomposition of Pluronic F127 and good structural stability. This work not only provides a green route for high-value utilization of coal in energy storage, but also paves a new way to make hierarchical porous carbon nanofibers from coal for supercapacitor electrodes with high specific capacitance and long cycle life.
机译：一种绿色方法设计用于从煤中获得分层多孔碳纳米纤维。在工作中，分别使用去离子水，煤，聚乙烯醇和Pluronic F127作为水溶液，碳源，纺丝助剂和用于纺丝的软模板。作为超级电容器的电极材料，所获得的分层多孔碳纳米纤维在6M KOH中以1.0Ag（-1）的高比电容在6M KOH中表现出1.0Ag（-1），具有220.3f g的电容的良好速率性能（ -1）在20.0Ag（-1）时，保留83.1％，在10 000Ag（-1）下的电荷/放电循环后没有电容损耗的优越循环稳定性。与没有Pluronic F127构建的碳纳米纤维相比，通过分解Pluronic F127的分解和良好的结构稳定性形成的样品益处的增强的电化学性能。这项工作不仅为储能煤的高价值利用提供了一种绿色途径，而且还铺设了一种具有高比电容和长循环寿命的超级电容器电极的分层多孔碳纳米纤维。

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  • 来源
    《RSC Advances》 |2019年第11期|共9页
  • 作者

    Tong Fenglian; Jia Wei; Pan Yanliang; Guo Jixi; Ding Lili; Chen Jingjing; Jia Dianzeng;

  • 作者单位

    Xinjiang Univ Inst Appl Chem Lab Energy Mat Chem Key Lab Adv Funct Mat Minist Educ Urumqi 830046 Xinjiang Peoples R China;

    Xinjiang Univ Inst Appl Chem Lab Energy Mat Chem Key Lab Adv Funct Mat Minist Educ Urumqi 830046 Xinjiang Peoples R China;

    Xinjiang Univ Inst Appl Chem Lab Energy Mat Chem Key Lab Adv Funct Mat Minist Educ Urumqi 830046 Xinjiang Peoples R China;

    Xinjiang Univ Inst Appl Chem Lab Energy Mat Chem Key Lab Adv Funct Mat Minist Educ Urumqi 830046 Xinjiang Peoples R China;

    Xinjiang Univ Inst Appl Chem Lab Energy Mat Chem Key Lab Adv Funct Mat Minist Educ Urumqi 830046 Xinjiang Peoples R China;

    Xinjiang Univ Inst Appl Chem Lab Energy Mat Chem Key Lab Adv Funct Mat Minist Educ Urumqi 830046 Xinjiang Peoples R China;

    Xinjiang Univ Inst Appl Chem Lab Energy Mat Chem Key Lab Adv Funct Mat Minist Educ Urumqi 830046 Xinjiang Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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