Study on activation and modification of methane-pyrolyzed carbon and its electrochemical performances

ZHANG Fan; NIU Guowei; WANG Hulin; WEI Yuxue; SUN Song; CHANG Qiang; ZHANG Chenghua

doi:10.12434/j.issn.2097-2547.20260036

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Study on activation and modification of methane-pyrolyzed carbon and its electrochemical performances

更新时间：2026-07-28

- Study on activation and modification of methane-pyrolyzed carbon and its electrochemical performances
  增强出版
- Pages: 1-14(2026)
- 作者机构：
  
  1.安徽大学化学化工学院，安徽合肥 230601
  2.中科合成油技术股份有限公司国家能源煤基液体燃料研发中心，北京101407
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20260036
  CLC： TQ15;O643
- Received：21 January 2026，
  
  Revised：2026-03-16，
  
  Online First：27 July 2026，
- 稿件说明：
移动端阅览
张帆,牛国伟,王虎林等.甲烷裂解碳的活化改性及其电化学性能研究[J].低碳化学与化工,

ZHANG Fan,NIU Guowei,WANG Hulin,et al.Study on activation and modification of methane-pyrolyzed carbon and its electrochemical performances[J].Low-Carbon Chemistry and Chemical Engineering,
张帆,牛国伟,王虎林等.甲烷裂解碳的活化改性及其电化学性能研究[J].低碳化学与化工, DOI：10.12434/j.issn.2097-2547.20260036.

ZHANG Fan,NIU Guowei,WANG Hulin,et al.Study on activation and modification of methane-pyrolyzed carbon and its electrochemical performances[J].Low-Carbon Chemistry and Chemical Engineering, DOI：10.12434/j.issn.2097-2547.20260036.

摘要

甲烷裂解碳经活化处理后用作超级电容器电极材料，能够有效提升甲烷裂解工艺的经济性。基于这一背景，针对甲烷裂解碳碱活化工艺展开了研究，旨在优化活化条件以探究活性炭结构与比电容的相关性。采用正交实验结合极差分析法，探究了碱碳比（

(KOH)/

(甲烷裂解碳)）、活化温度和活化时间对活性炭结构和电化学性能的影响，随后固定碱碳比和活化时间，重点剖析了活化温度对活性炭的形貌、织构性质、物相和比电容等的影响。结果显示，随活化温度升高，活性炭的比表面积呈单调递增趋势，微孔比表面积则呈现“火山型”变化。C-4-600-2.0（600 ℃下活化2.0 h）的微孔比表面积达到最大值（1120.16 m

/g），微孔占比（微孔孔容/总孔孔容）也较大。当活化温度进一步升高，KOH会烧穿微孔壁，促使微孔联结形成大量孔径3 nm以上的介孔。电化学测试结果表明，活性炭的比电容与微孔比表面积呈正相关，证明微孔是影响其电化学性能的核心因素。C-4-600-2.0在三电极体系中比电容最高（193.71 F/g），双电极体系中比电容为176.4 F/g，且经5000次循环测试后，C-4-600-2.0依旧保持良好的电化学稳定性，比电容保持率为88.72%，库伦效率为87.02%。

Abstract

Methane-pyrolyzed carbon

after activation treatment

can be used as an electrode material for supercapacitors

effectively improving the economic efficiency of methane-pyrolyzed processes. Based on this background

research has been conducted on the alkali activation process of methane-pyrolyzed carbon

aiming to optimize the activation conditions and explore the correlation between structures and specific capacitances of activated carbon. Using orthogonal experiments combined with range analysis

the effects of alkali to carbon ratios (

(KOH)/

(methane-pyrolyzed carbon))

activation temperatures

and activation time on the structures and electrochemical performances of activated carbon were investigated. Subsequently

fixing the alkali to carbon ratios and activation time

the effects of activation temperatures on morphologies

textural properties

phases and specific capacitances of activated carbon were analyzed in detail. The re

sults indicate that with the increase of activation temperatures

the specific surface areas of activated carbon show a monotonic increasing trend

while the specific surface areas of micropores show a “volcanic-type” variation. The specific surface area of micropores of C-4-600-2.0 (activated at 600 ℃ for 2.0 h) reaches the maximum value (1120.16 m

/g)

and the proportion of micropores (micropore volume/total pore volume) is also relatively large. When the activation temperature further increases

KOH will burn through the micropore walls

promoting the connection of micropores to form a large number of mesopores with diameters exceeding 3 nm. The electrochemical test results demonstrate that specific capacitances of activated carbon are positively correlated with the specific surface areas of micropores

indicating that micropores are the core factor affecting their electrochemical performances. C-4-600-2.0 exhibits the highest specific capacitance (193.71 F/g) in the three-electrode system

and the specific capacitance in the two-electrode system is 176.4 F/g. After 5000 cycles of testing

C-4-600-2.0 maintains excellent electrochemical stability

with a specific capacitance retention rate of 88.72% and a coulombic efficiency of 87.02%.

关键词

Keywords

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