储能科学与技术2016，Vol.5Issue(6)：855-860,6.DOI:10.12028/j.issn.2095-4239.2016.0040
生物质基球形活性炭的制备及其电化学性能
Study on preparation and electrochemical properties of biomass-derived spherical activated carbon
马玉柱 1周聪 2于宝军 3陈明鸣 1王成扬2
作者信息
- 1. 天津大学化工学院绿色合成与转化教育部重点实验室，天津 30007
- 2. 天津大学化工学院协同创新中心，天津 300072
- 3. 能量转换与储存材料北京市重点实验室，北京师范大学化学学院，北京 100875
- 折叠
摘要
Abstract
Spherical activated carbon has been fabricated via a simple solvent evaporation method followed by an activation process. The natural and renewable biomass material, leonardite humic acid (LHA) is used as the carbon source. The surface morphologies and pore parameters of the carbon spheres were analyzed by scanning electron microscope (SEM) and N2 physical adsorption-desorption instrument. Symmetric capacitor coin type cells were assembled using two spherical activated carbon electrodes. The electrochemical performance of supercapacitors is characterized by galvanostatic charge-discharge (GCD), cyclic voltammograms (CV) and electrochemical impedance spectroscopy (EIS) in 6 M KOH electrolyte. The results show that the obtained spherical activated carbon with good sphericity also possess high specific surface area ( 2034 m2/g) and pore volume (1.24 cm3/g). Meanwhile, the spherical activated carbon electrode materials exhibit a superior high specific capacitance of 319 F/g at a current density of 0.05 A/g. Remarkably, the sample also has outstanding cycling stability with a capacitance retention of 98.9%after 10,000 cycles. In addition, compared with powdered activated carbon, spherical activated carbon has better conductivity and presents more excellent rate capability and cycle performance. This suggests that the LHA-based spherical activated carbon should be a competitive and promising supercapacitor electrode material.关键词
腐殖酸/球形活性炭/孔道结构/超级电容器Key words
humic acids/spherical activated carbon/pore structure/supercapacitors分类
化学化工引用本文复制引用
马玉柱,周聪,于宝军,陈明鸣,王成扬..生物质基球形活性炭的制备及其电化学性能[J].储能科学与技术,2016,5(6):855-860,6.
