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首页> 外文期刊>Nanotechnology >Kinetics control over the Schiff base formation reaction for fabrication of hierarchical porous carbon materials with tunable morphology for high-performance supercapacitors
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Kinetics control over the Schiff base formation reaction for fabrication of hierarchical porous carbon materials with tunable morphology for high-performance supercapacitors

机译：对高性能超级电容器进行分层多孔碳材料制备的席夫底层形成反应的动力学控制

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摘要

Schiff base formation reaction is highly dynamic, and the microstructure of Schiff base polymers is greatly affected by reaction kinetics. Herein, a series of Schiff base cross-linked polymers (SPs) with different morphologies are synthesized through adjusting the species and amount of catalysts. Nitrogen/oxygen co-doped hierarchical porous carbon nanoparticles (HPCNs), with tunable morphology, specific surface area (SSA) and porosity, are obtained after one-step carbonization. The optimal sample (HPCN-3) possesses a coral reef-like microstructure, high SSA up to 1003 m(2) g(-1), and a hierarchical porous structure, exhibiting a remarkable specific capacitance of 359.5 F g(-1) (at 0.5 A g(-1)), outstanding rate capability and cycle stability in a 1 M H2SO4 electrolyte. Additionally, the normalized electric double layer capacitance (EDLC) and faradaic capacitance of HPCN-3 are 0.239 F m(-2) and 10.24 F g(-1) respectively, certifying its superior electrochemical performance deriving from coral reef-like structure, high external surface area and efficient utilization of heteroatoms. The semi-solid-state symmetrical supercapacitor based on HPCN-3 delivers a capacitance of 55 F g(-1) at 0.5 A g(-1), good cycle stability of 86.7% after 5000 GCD cycles at 10 A g(-1), and the energy density ranges from 7.64 to 4.86 Wh kg(-1).
机译：席夫碱形成反应是高度动态的，反应动力学对席夫碱聚合物的微观结构有很大影响。本文通过调整催化剂的种类和用量，合成了一系列不同形貌的席夫碱交联聚合物。氮氧共掺杂的分级多孔碳纳米颗粒（HPCNs）经过一步炭化后，其形貌、比表面积（SSA）和孔隙率可调。最佳样品（HPCN-3）具有珊瑚礁状微观结构、高SSA（高达1003 m（2）g（-1））和分级多孔结构，在1 m H2SO4电解液中表现出显著的比电容359.5 F g（-1）（0.5 a g（-1））、优异的速率性能和循环稳定性。此外，HPCN-3的归一化双电层电容（EDLC）和法拉第电容分别为0.239 F m（-2）和10.24 F g（-1），证明了其优越的电化学性能源自珊瑚礁状结构、高的外表面积和对杂原子的高效利用。基于HPCN-3的半固态对称超级电容器在0.5 a g（-1）下提供55 F g（-1）的电容，在10 a g（-1）下5000 GCD循环后具有86.7%的良好循环稳定性，能量密度范围为7.64至4.86 Wh kg（-1）。

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  • 来源
    《Nanotechnology》 |2021年第30期|共11页
  • 作者

    Liu Ling; Li Yuntong; Lu Zhenwu; Chen Ting; Cai Qipeng; Xu Yiting; Zeng Birong; Yuan Conghui; Kuo Shiao-Wei; Dai Lizong;

  • 作者单位

    Xiamen Univ Coll Mat Fujian Prov Key Lab Fire Retardant Mat Xiamen 361005 Peoples R China;

    Xiamen Univ Coll Mat Fujian Prov Key Lab Fire Retardant Mat Xiamen 361005 Peoples R China;

    Xiamen Univ Coll Mat Fujian Prov Key Lab Fire Retardant Mat Xiamen 361005 Peoples R China;

    Xiamen Univ Coll Mat Fujian Prov Key Lab Fire Retardant Mat Xiamen 361005 Peoples R China;

    Xiamen Univ Coll Mat Fujian Prov Key Lab Fire Retardant Mat Xiamen 361005 Peoples R China;

    Xiamen Univ Coll Mat Fujian Prov Key Lab Fire Retardant Mat Xiamen 361005 Peoples R China;

    Xiamen Univ Coll Mat Fujian Prov Key Lab Fire Retardant Mat Xiamen 361005 Peoples R China;

    Xiamen Univ Coll Mat Fujian Prov Key Lab Fire Retardant Mat Xiamen 361005 Peoples R China;

    Natl Sun Yat Sen Univ Ctr Nanosci &

    Nanotechnol Dept Mat &

    Optoelect Sci Kaohsiung 804 Taiwan;

    Xiamen Univ Coll Mat Fujian Prov Key Lab Fire Retardant Mat Xiamen 361005 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    kinetics control; Schiff base; carbon materials; hierarchical porous structure; tunable morphology; semi-solid-state supercapacitor;

    机译：动力学控制;希夫碱;碳材料;分层多孔结构;可调形态;半固态超级电容器;

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