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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Self-Biotemplate Preparation of Hierarchical Porous Carbon with Rational Mesopore Ratio and High Oxygen Content for an Ultrahigh Energy-Density Supercapacitor
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Self-Biotemplate Preparation of Hierarchical Porous Carbon with Rational Mesopore Ratio and High Oxygen Content for an Ultrahigh Energy-Density Supercapacitor

机译：自身生物板制备等级多孔碳，具有理性的中孔比和超高能量密度超级电容器的高氧含量

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摘要

Although hierarchical porous carbons (HPCs) are greatly emphasized in electrochemical energy storage, it is still difficult to develop a facile and cost-effective method for fabricating HPCs. Herein, we demonstrate a combination strategy to synthesize N-self-doped HPC from biomass (rice straw) on the basis of the following key consideration: well-dispersed intrinsic silica acts as an built-in biotemplate to form large numbers of mesopores, while chemical activation produces plenty of micropores. The as -prepared N-self doped HPC has a reasonable mesopore ratio and high contents of O functionalities. This unique feature allows the fast transport of ions, highly accessible surface area, and additional pseudocapacitive behavior. As a result, the as prepared HPC exhibits ultrahigh specific capacitance of 357 F g(-1) (0.5 A g(-1), 1 M H2SO4) for a three -electrode system and of 260 F g(-1) (1 A g(-1), 1 M Na2SO4) for a two-electrode system, excellent capacitance retention, and excellent cycling stability, superior to most of biomass-derived carbons. Moreover, the energy density of HPC is high up to 29.3 W h kg-(1) at a power density of 900 W kg(-1). In addition, the HPC exhibits high CO2 capture capacities of 6.57 mmol g(-1) at 0 degrees C and 4.13 mmol g(-1) at 25 degrees C.
机译：虽然在电化学能量存储中大大强调了等级多孔碳（HPC），但仍难以开发一种用于制造HPC的容易和成本效益的方法。在此，我们证明了在以下关键考虑因素的基础上将来自生物量（稻草）合成N-自掺杂HPC的组合策略：分散良好的内在二氧化硅作为内置生物板，以形成大量的中孔，而是化学活化产生大量的微孔。作为 - 自掺杂HPC作为备份的N-自掺杂HPC具有合理的中孔比和高含量的O功能。这种独特的功能允许快速运输离子，高度可移的表面积和额外的假偶像感应行为。结果，作为三电极系统的357f g（-1）（0.5Ag（-1），1M H2SO4）的超高特定电容具有超高的特定电容，并且为260V（-1）（1用于双电极系统的G（1），1M NA2SO4），优异的电容保持和优异的循环稳定性，优于大多数生物质衍生的碳。此外，HPC的能量密度高达29.3 W H kg-（1），其功率密度为900W kg（-1）。此外，HPC在25摄氏度下在0℃和4.13mmol G（-1）时具有6.57mmol G（-1）的高CO 2捕获容量。

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  • 作者

    Chen Zehong; Zhuo Hao; Hu Yijie; Zhong Linxin; Peng Xinwen; Jing Shuangshuang; Liu Qingzhong; Zhang Xiaoting; Liu Chuanfu; Sun Runcang;

  • 作者单位

    South China Univ Technol State Key Lab Pulp &

    Paper Engn 381 Wushan Rd Guangzhou 510641 Guangdong Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn 381 Wushan Rd Guangzhou 510641 Guangdong Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn 381 Wushan Rd Guangzhou 510641 Guangdong Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn 381 Wushan Rd Guangzhou 510641 Guangdong Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn 381 Wushan Rd Guangzhou 510641 Guangdong Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn 381 Wushan Rd Guangzhou 510641 Guangdong Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn 381 Wushan Rd Guangzhou 510641 Guangdong Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn 381 Wushan Rd Guangzhou 510641 Guangdong Peoples R China;

    South China Univ Technol State Key Lab Pulp &

    Paper Engn 381 Wushan Rd Guangzhou 510641 Guangdong Peoples R China;

    Beijing Forestry Univ Beijing Key Lab Lignocellulos Chem 35 Qinghua East Rd Beijing 100083 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    Self-biotemplate; Biomass; Hierarchical porous carbon; N-self-doped; Supercapacitors; CO2 capture;

    机译：自生物板;生物量;分层多孔碳;正掺杂;超级电容器;CO2捕获;

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