化工进展 ›› 2022, Vol. 41 ›› Issue (7): 3770-3783.DOI: 10.16085/j.issn.1000-6613.2021-1797

• 材料科学与技术 • 上一篇    下一篇

木质素纳米颗粒/天然纤维基活性碳纤维材料的制备及其电化学性能

张伟1(), 安兴业1(), 刘利琴1, 龙垠荧1, 张昊1, 程正柏2, 曹海兵2, 刘洪斌1()   

  1. 1.天津科技大学轻工科学与工程学院,天津市制浆造纸重点实验室,天津 300457
    2.浙江景兴纸业股份 有限公司,浙江 平湖 314214
  • 收稿日期:2021-08-22 修回日期:2021-11-22 出版日期:2022-07-25 发布日期:2022-07-23
  • 通讯作者: 安兴业,刘洪斌
  • 作者简介:张伟(1996—),男,硕士研究生,研究方向为先进纤维与纸基功能材料。E-mail:1435048976@qq.com
  • 基金资助:
    国家重点研发计划(2019YFC1905904);国家自然科学基金(3210140637);浙江景兴纸业股份有限公司校企合作项目;中国博士后科学基金(2021M692401);天津市自然科学基金(19JCQNJC05400)

Preparation and electrochemical performance of lignin nanoparticles/natural fiber based activated carbon fiber materials

ZHANG Wei1(), AN Xingye1(), LIU Liqin1, LONG Yinying1, ZHANG Hao1, CHENG Zhengbai2, CAO Haibing2, LIU Hongbin1()   

  1. 1.Tianjin Key Laboratory of Pulp and Paper, College of Light Industry Science and Engineering, Tianjin University of Science and Technology, Tianjin 300457, China
    2.Zhejiang Jingxing Paper Joint Stock Company Limited, Pinghu 314214, Zhejiang, China
  • Received:2021-08-22 Revised:2021-11-22 Online:2022-07-25 Published:2022-07-23
  • Contact: AN Xingye,LIU Hongbin

摘要:

以木质素纳米颗粒(LNPs)负载的天然纤维复合材料为研究对象,利用KOH活化的方法对其进行处理制备生物质基复合多孔活性碳纤维电极材料。随后在三电极体系中对合成的复合多孔活性碳纤维电极材料进行了电化学性能测试。研究表明,在0.5A/g的电流密度下,KOH活化的复合碳纤维电极材料的比电容为351.13F/g,远高于相同条件下未活化的复合碳纤维电极材料的比电容(7.88F/g)和未负载LNPs的天然纤维基活性碳纤维材料(306.50F/g)。而且在活化过程中,负载在纤维表面的LNPs会形成多孔的活性碳层结构,这会进一步提高复合活性碳纤维材料的循环稳定性,同时LNPs中丰富的羟基赋予复合材料额外的赝电容。在10A/g的电流密度下经过10000次循环后,复合活性碳纤维电极材料的电容保持率仍然为95%,高于未负载LNPs的活性碳纤维电极材料的电容保持率87%。结果表明,木质素纳米颗粒/天然纤维基活性碳纤维材料是一种理想的电极材料,本研究也为LNPs在生物质碳纤维作为储能电极材料的高值化应用提供了一条新途径。

关键词: 活化, 氢氧化钾, 木质素纳米颗粒, 生物质, 超级电容器, 电化学

Abstract:

This study was focused on the composite lignin nanoparticles (LNPs) loaded natural fibers, which was by KOH activation to prepare composite porous activated carbon fiber electrode materials. Then the as-prepared activated carbon fiber electrode was tested to evaluate the electrochemical performance in a three-electrode system. The results showed that the specific capacitance of KOH activated carbon fiber electrode material was 351.13F/g at the current density of 0.5A/g, which was much higher than that of non-activated carbon fiber electrode material (7.88F/g) and natural fiber activated carbon fiber material without LNPs (306.50F/g) under the same conditions. In addition, fiber surface loaded with LNPs formed porous activated carbon layer structure during the activation process, which further improved the cyclic stability of the composite activated carbon fiber material. Meanwhile, the abundant hydroxyl of LNPs endowed the composite material with additional pseudocapacitance. After 10000 cycles at a current density of 10A/g, the capacitive retention of the composite activated carbon fiber electrode was still at 95%, which was higher than that of the activated carbon fiber electrode of 87% without LNPs loading. The results indicated that lignin nanoparticles/ natural fiber based activated carbon fiber was an ideal electrode material for supercapacitors. This study also provided a new way for the high-value application of LNPs in biomass carbon fiber as energy storage electrode material.

Key words: activation, potassium hydroxide (KOH), lignin nanoparticles (LNPs), biomass, supercapacitor, electrochemistry

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