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Preparation of a porous carbon from Enteromorpha prolifera with excellent electrochemical properties

LI Shi-jie ZHANG Ming-yang GAO Yan LI Hui WANG Qian ZHANG Lin-hua

李诗杰, 张明阳, 高岩, 李辉, 王茜, 张林华. 基于“蛋盒”结构高电化学性能分级多孔炭的制备[J]. 新型炭材料, 2021, 36(6): 1158-1168. doi: 10.1016/S1872-5805(21)60068-9
引用本文: 李诗杰, 张明阳, 高岩, 李辉, 王茜, 张林华. 基于“蛋盒”结构高电化学性能分级多孔炭的制备[J]. 新型炭材料, 2021, 36(6): 1158-1168. doi: 10.1016/S1872-5805(21)60068-9
LI Shi-jie, ZHANG Ming-yang, GAO Yan, LI Hui, WANG Qian, ZHANG Lin-hua. Preparation of a porous carbon from Enteromorpha prolifera with excellent electrochemical properties[J]. NEW CARBON MATERIALS, 2021, 36(6): 1158-1168. doi: 10.1016/S1872-5805(21)60068-9
Citation: LI Shi-jie, ZHANG Ming-yang, GAO Yan, LI Hui, WANG Qian, ZHANG Lin-hua. Preparation of a porous carbon from Enteromorpha prolifera with excellent electrochemical properties[J]. NEW CARBON MATERIALS, 2021, 36(6): 1158-1168. doi: 10.1016/S1872-5805(21)60068-9

基于“蛋盒”结构高电化学性能分级多孔炭的制备

doi: 10.1016/S1872-5805(21)60068-9
基金项目: 山东建筑大学博士基金(XNBS1838)
详细信息
  • 中图分类号: TQ127.1+1

Preparation of a porous carbon from Enteromorpha prolifera with excellent electrochemical properties

Funds: This study was supported by the Doctoral Fund of Shandong Jianzhu University (XNBS1838)
More Information
  • 摘要: 基于浒苔中海藻酸钙的“蛋盒”结构,对浒苔炭化产物进行盐酸酸洗处理,去除海藻酸钙中的钙离子,形成“蛋盒”式初始孔结构。以酸洗处理后的炭化产物为前驱体,采用KOH活化法制备浒苔基分级多孔活性炭,并研究活性炭的孔结构特性及电化学性能。研究表明:浒苔基活性炭具有分级多孔结构,其比表面积(SBET)高达3 283 m2 g−1,其中介孔提供了66%以上的比表面积。当用作超级电容器电极材料时,即使在较高的电流密度下,浒苔基活性炭也表现出优异的电化学性能。当电流密度为0.1 A g−1时,浒苔基活性炭的比电容为361 F g−1,当电流密度增大至10 A g−1时,活性炭的比电容仍然高达323 F g−1,表现出优异的高倍率性能。
  • FIG. 1083.  FIG. 1083.

    FIG. 1083.. 

    Figure  1.  N2 adsorption-desorption isotherms of AC and EAC.

    Figure  2.  Pore size distributions of AC and EAC.

    Figure  3.  "Egg-box" structural macromolecular fragments formed by G unit and Ca2+.

    Figure  4.  Principle of pore formation by removing Ca2+ from carbonized products.

    Figure  5.  SEM images of carbonized products of EP before and after HCl pickling.

    Figure  6.  SEM and TEM images of EAC.

    Figure  7.  EDS analysis of carbonization products before and after pickling.

    Figure  8.  XRD patterns of AC and EAC.

    Figure  9.  FT-IR spectra of the AC and EAC.

    Figure  10.  GCD curves of AC and EAC at the different current densities.

    Figure  11.  CV curves of EAC and AC.

    Figure  12.  Rate performance of AC and EAC.

    Figure  13.  Cycle performance of AC and EAC at the current density of 5 A g−1.

    Figure  14.  Nyquist impedance plots of AC- and EAC-based supercapacitors.

    Table  1.   Ultimate analysis and proximate analysis of the EP.

    Ultimate analyses (ad)Proximate analyses (ad)
    SampleCHONSCaMgMAFCV
    EP38.64.933.51.90.63.21.34.916.315.063.8
    Note: M is the moisture, A is the ash, FC is the fixed carbon, V is the volatile.
    下载: 导出CSV

    Table  2.   Characteristics of pores in AC and EAC.

    SampleSBET
    (m2 g−1)
    SMic
    (m2 g−1)
    SMes
    (m2 g−1)
    SMes/SMicVTot
    (cm3 g−1)
    VMic
    (cm3 g−1)
    DMic
    (nm)
    DMes
    (nm)
    EAC3283110521781.973.861.530.754.62
    AC217518593160.172.131.250.623.10
    Note: SMic represents micropore specific surface area, SMes represents mesopore specific surface area, VTot represents total pore volume, VMic represents micropore volume, DMic represents micropore average pore diameter, DMes represents mesopore average pore diameter.
    下载: 导出CSV

    Table  3.   Gravimetric capacitance of AC and EAC at different current densities.

    SampleCapacitance (F g−1)
    0.1
    (A g−1)
    0.2
    (A g−1)
    0.5
    (A g−1)
    1
    (A g−1)
    2
    (A g−1)
    5
    (A g−1)
    10
    (A g−1)
    AC253233220213208205202
    EAC361350338330327325323
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-04-10
  • 修回日期:  2020-06-01
  • 网络出版日期:  2021-08-10
  • 刊出日期:  2021-12-01

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