基于硫酸为电解液的超级电容器木基活性炭电极材料的制备（英文）

发布时间：2018-06-27 02:36

  本文选题：活性炭 + 孔结构　； 参考：《新型炭材料》2017年04期

【摘要】：以NaOH为活化剂,采用两步热化学过程制备出木基活性炭。将所制活性炭用作以硫酸为电解液的超级电容器电极材料。探讨了合成条件对活性炭孔结构和电化学性能。结果表明,在微孔中形成双电层电容,介孔和大孔则实现离子运输。在高的活化温度或高碱炭比下,材料被过度活化,导致高的介孔、大孔孔容,这增加了电解液的吸收,从而降低质量比电容。最佳的活性炭合成条件为,活化温度:600℃,碱炭比:1.25。
[Abstract]:Wood-based activated carbon was prepared by two-step thermochemical process with NaOH as activator. The activated carbon was used as electrode material of supercapacitor with sulfuric acid as electrolyte. The effect of synthesis conditions on pore structure and electrochemical properties of activated carbon was discussed. The results show that the double layer capacitance is formed in the micropore and the ion transport is realized in the mesopore and macropore. At high activation temperature or high alkali-carbon ratio, the material is over-activated, which leads to high mesoporous and large pore volume, which increases the absorption of electrolyte and reduces the mass specific capacitance. The optimum conditions for the synthesis of activated carbon are as follows: activation temperature: 600 鈩，

本文编号：2072339