欢迎访问《林产化学与工业》,

林产化学与工业 ›› 2022, Vol. 42 ›› Issue (5): 37-44.doi: 10.3969/j.issn.0253-2417.2022.05.006

• 研究报告 • 上一篇    下一篇

杉木树皮基活性炭的制备、表征及其电化学性能研究

罗路1, 罗凌聪1, 邓剑平1, 周亚兰1, 范毜仔1,2, 赵伟刚1,*()   

  1. 1. 福建农林大学 材料工程学院,福建 福州 350018
    2. 英国布鲁内尔大学 土木工程学院,伦敦 UB8 3PH,英国
  • 收稿日期:2021-07-07 出版日期:2022-10-28 发布日期:2022-11-02
  • 通讯作者: 赵伟刚 E-mail:weigang-zhao@fafu.edu.cn
  • 作者简介:赵伟刚,副教授,硕士生导师,研究领域为生物质基复合材料与多孔炭材料;E-mail: weigang-zhao@fafu.edu.cn
    罗路(1992—),男,福建大田人,博士生,主要从事生物质能源与材料的研究工作
  • 基金资助:
    国家自然科学基金资助项目(31971593);福建省自然科学基金(高校联合资金)资助项目(2019J01386)

Preparation, Characteristics and Electrochemical Performance of Chinese Fir Bark-based Activated Carbon

Lu LUO1, Lingcong LUO1, Jianping DENG1, Yalan ZHOU1, Mizi FAN1,2, Weigang ZHAO1,*()   

  1. 1. College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350018, China
    2. College of Engineering, Design and Physical Sciences, Brunel University, London UB8 3PH, United Kingdom
  • Received:2021-07-07 Online:2022-10-28 Published:2022-11-02
  • Contact: Weigang ZHAO E-mail:weigang-zhao@fafu.edu.cn

摘要:

以林业废弃物杉木树皮作原料,通过低温炭化和KOH高温活化两步法制备了具有高表面积和孔隙率的杉木树皮基活性炭并应用于超级电容器电极材料。以碱炭比和活化温度为试验因素,以电流密度0.5 A/g下的质量比电容为响应值,进行中心复合设计(CCD)和响应面分析。研究结果表明:杉木树皮基活性炭的比表面积最高可达1 522 m2/g,最大孔容可达0.84 cm3/g,此时平均孔径为1.12 nm,且同时存在大量的中孔和微孔。碱炭比和活化温度的交互作用对比电容的影响显著,响应面法优化得到杉木树皮基活性炭最佳制备工艺为:碱炭比值为3,活化温度605 ℃,此条件下炭材料的比电容为185.7 F/g。对优化条件下制备的活性炭进行电化学性能测试发现:在0.5 A/g条件下的最大比电容为188 F/g,且具有良好的倍率性能(85.1%)。

关键词: 响应面, 杉木树皮, 活性炭, 电化学, 比电容

Abstract:

Fir bark-based activated carbon with high surface area and porosity was prepared from by a two-step method of low-temperature carbonization and KOH high-temperature activation using forestry waste fir bark as precursor, and applied as supercapacitor electrode materials. The central composite design(CCD) and response surface analysis were carried out using alkali carbon ratio and activation temperature as the experimental factors, and the mass specific capacitance at a current density of 0.5 A/g as the response value. The results showed that the specific surface area of fir bark-based activated carbon could reach 1 522 m2/g, and the maximum pore volume could reach 0.84 cm3/g. At the same time, the average pore size was 1.12 nm, and a large number of mesopores and micropores was coexisted. The interaction between the alkali carbon ratio and the activation temperature had significant impact on the capacitance. The optimal preparation process of Chinese fir bark activated carbon was obtained by response surface methodology: alkali carbon ratio of 3, and activation temperature of 605 ℃. The specific capacitance of the carbon material under this condition was 185.7 F/g. The electrochemical performance test of the activated carbon prepared under the optimized conditions indicated that the maximum specific capacitance could reach 188 F/g at 0.5 A/g, and it had a good rate capability(85.1%).

Key words: response surface, fir bark, activated carbon, electrochemistry, specific capacitance

中图分类号: