Influence of foaming temperature on the structure of coal-based carbon foams and the electrochemical performance of electrical double-layer capacitors

被引：0

作者：

Hou, Weiqiang ^{[1
,2
]}

Wu, Xiaoxing ^{[1
,2
]}

Li, Cen ^{[1
,2
]}

Shen, Yanfeng ^{[1
,2
]}

Wang, Meijun ^{[1
,2
]}

Guo, Chunli ^{[3
]}

Chang, Liping ^{[1
,2
]}

机构：

[1] Taiyuan Univ Technol, State Key Lab Clean & Efficient Coal Utilizat, Taiyuan 030024, Peoples R China

[2] Taiyuan Univ Technol, Key Lab Coal Sci & Technol, Minist Educ & Shanxi Prov, Taiyuan 030024, Peoples R China

[3] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Peoples R China

来源：

JOURNAL OF ENERGY STORAGE | 2025年 / 112卷

基金：

中国国家自然科学基金;

关键词：

Coal-based carbon foam; Foaming temperature; Electrical double-layer capacitor; Electrochemical performance; ACTIVATED CARBON; POROUS CARBON; SUPERCAPACITORS; INTERCALATION; ELECTRODE; SURFACE; ION;

D O I：

10.1016/j.est.2025.115537

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The rational design of coal substrate structure is an effective approach to developing high-efficiency coal-based supercapacitor electrode materials. This study investigates the preparation of coal-based carbon foam (NCF) from strongly-bonded bituminous coal using an atmospheric pressure self-foaming method at various temperatures within the plasticity interval. The resulting NCF was then activated with KOH to produce activated carbon foam (ACF), which was used as electrode material in Electrical Double-Layer Capacitors (EDLCs). Notably, NCF-460, obtained at the maximum fluidity temperature (460 degrees C), exhibits the highest open porosity (88.29 %) and the lowest bulk density (0.166 g cm- 3). The three-dimensional interconnected pore structure of NCF facilitates the effective penetration of KOH, providing more active sites. Consequently, ACF-460 demonstrates superior specific surface area (2370.64 m2 g- 1) and mesopore volume ratio (44.04 %), along with remarkable energy density (59.34 Wh kg- 1) and cycling stability in EDLC applications. This study offers an effective approach for converting coal into advanced electrode materials, which provides a new idea for the materialized and high value-added utilization of coal.

引用

页数：12

共 59 条

[1] Lamba P., Singh P., Singh P., Singh P., Bharti K.A., Et al., Recent advancements in supercapacitors based on different electrode materials: classifications, synthesis methods and comparative performance[J], Journal of Energy Storage, 48, (2022)
[2] Huang J., Xie Y., You Y., Yuan J., Xu Q., Xie H., Et al., Rational design of electrode materials for advanced supercapacitors: from lab research to commercialization[J], Adv. Funct. Mater., 33, 14, (2023)
[3] Wang K., Wang Z., Wang C., Zhang X., Wu L., Carbon fiber electrodes for composite structural supercapacitor: preparation and modification methods[J], Journal of Energy Storage, 98, (2024)
[4] Zhang R., Liu H., Cui Z., Zhang Y., Wang Y., Oxygen-rich microporous carbon derived from humic acid extracted from lignite for high-performance supercapacitors[J], Fuel, 364, (2024)
[5] Cao Y., Sun S., Li W., Chang Y., Gu N., Yao J., Et al., Challenge and technological trends of flexible solid-state supercapacitors[J], Journal of Energy Storage, 97, (2024)
[6] Poonam S.K., Arora A., Tripathi S.K., Review of supercapacitors: materials and devices[J], Journal of Energy Storage, 21, pp. 801-825, (2019)
[7] Pan Y., Xu K., Wu C., Recent progress in supercapacitors based on the advanced carbon electrodes[J], Nanotechnol. Rev., 8, 1, pp. 299-314, (2019)
[8] Guo C., Zhang Y., Yin M., Shi J., Zhang W., Wang X., Et al., Co3O4@Co3S4 core-shell neuroid network for high cycle-stability hybrid-supercapacitors[J], J. Power Sources, 485, (2021)
[9] Molahalli V., Chaithrashree K., Singh M.K., Agrawal M., Krishnan S.G., Hegde G., Past decade of supercapacitor research-lessons learned for future innovations[J], Journal of Energy Storage, 70, (2023)
[10] Xiong S., Lv F., Wang C., Yang N., Zhang Y., Duan Q., Et al., Coal-based activated carbon prepared by H2O activation process for supercapacitors using response surface optimization method[J], Front. Chem. Sci. Eng., 18, 6, (2024)

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