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An ultrasonic-assisted synthesis of rice-straw-based porous carbon with high performance symmetric supercapacitors

机译:高性能对称超级电容器的超声波辅助合成水稻秸秆基多孔碳

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摘要

Biomass porous carbon materials are ideal supercapacitor electrode materials due to their low price, rich source of raw materials and environmental friendliness. In this study, an ultrasonic-assisted method was applied to synthesize the rice-straw-based porous carbon (UPC). The obtained UPC exhibited a two-dimensional structure and high specific surface area. In addition, the electrochemical test results showed that the UPC with a 1 hour ultrasonic treatment and lower activation temperature of 600 degrees C (UPC-600) demonstrated optimal performance: high specific capacitances of 420 F g(-1) at 1.0 A g(-1) and 314 F g(-1) at a high current of 10 A g(-1). Significantly, the symmetric supercapacitors showed a high energy density of 11.1 W h kg(-1) and power density of 500 W kg(-1). After 10 000 cycles, 99.8% of the specific capacitance was retained at 20 A g(-1). These results indicate that UPC-600 is a promising candidate for supercapacitor electrode materials.
机译:生物质多孔碳材料是理想的超级电容器电极材料,因为它们的低价格,丰富的原材料来源和环境友好。 在该研究中,应用超声波辅助方法合成稻草基多孔碳(UPC)。 获得的UPC表现出二维结构和高比表面积。 此外,电化学测试结果表明,UPC具有1小时的超声处理和较低的600摄氏度的激活温度(UPC-600)显示出最佳性能:420 f g(-1)的高比电容在1.0 a g( -1)和314 f g(-1)在10 a g(-1)的高电流下。 值得注意的是,对称超级电容器显示出11.1 W H kg(-1)的高能量密度和500W kg(-1)的功率密度。 在10 000个循环后,99.8%的特定电容保留在20Ag(-1)。 这些结果表明,UPC-600是超级电容器电极材料的有希望的候选者。

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  • 来源
    《RSC Advances》 |2020年第6期|共10页
  • 作者单位

    Huaiyin Normal Univ Sch Chem &

    Chem Engn Jiangsu Key Lab Chem Low Dimens Mat Huaian 223001 Peoples R China;

    Huaiyin Normal Univ Sch Chem &

    Chem Engn Jiangsu Key Lab Chem Low Dimens Mat Huaian 223001 Peoples R China;

    Huaiyin Normal Univ Sch Chem &

    Chem Engn Jiangsu Key Lab Chem Low Dimens Mat Huaian 223001 Peoples R China;

    Huaiyin Normal Univ Sch Chem &

    Chem Engn Jiangsu Key Lab Chem Low Dimens Mat Huaian 223001 Peoples R China;

    Huaiyin Normal Univ Sch Chem &

    Chem Engn Jiangsu Key Lab Chem Low Dimens Mat Huaian 223001 Peoples R China;

    Huaiyin Normal Univ Sch Chem &

    Chem Engn Jiangsu Key Lab Chem Low Dimens Mat Huaian 223001 Peoples R China;

    Huaiyin Normal Univ Sch Chem &

    Chem Engn Jiangsu Key Lab Chem Low Dimens Mat Huaian 223001 Peoples R China;

    Nanjing Univ State Key Lab Coordinat Chem Sch Chem &

    Chem Engn Nanjing 210093 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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