Constructing the Interconnected and Hierarchical Nanoarchitectonics in Coal-Derived Carbon for High-Performance Supercapacitor

Because of the deep and zigzag microporous structure, porous carbon materials exhibit inferior capacitive performance and sluggish electrochemical kinetics for supercapacitor electrode materials. Herein, a single-step carbonation and activation approach was utilized to synthesize coal-based porous c...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 40(2024), 26 vom: 02. Juli, Seite 13467-13475
1. Verfasser: Zhang, Binyuan (VerfasserIn)
Weitere Verfasser: Feng, Xia, Ma, Rui, Sheng, Rui, Wang, Danting, Chen, Feifei, Wang, Yuanyuan, Xu, Mengjiao, Ai, Lili, Guo, Nannan, Wang, Luxiang
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article
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520 |a Because of the deep and zigzag microporous structure, porous carbon materials exhibit inferior capacitive performance and sluggish electrochemical kinetics for supercapacitor electrode materials. Herein, a single-step carbonation and activation approach was utilized to synthesize coal-based porous carbon with an adjustable pore structure, using CaO as a hard template, KOH as an activator, and oxidized coal as precursors to carbon. The obtained sample possesses an interconnected and hierarchical porous structure, higher SSA (1060 m2 g-1), suitable mesopore volume (0.25 cm3 g-1), and abundant surface heteroatomic functional groups. Consequently, the synthesized carbon exhibits an exceptionally high specific capacitance of 323 F g-1 at 1 A g-1, along with 80.3% capacitance retention at 50 A g-1. The assembled two-electrode configuration demonstrates a remarkable capacitance retention of up to 95% and achieves Coulombic efficiency of nearly 100% with 10,000 cycles in a 6 M KOH electrolyte. Furthermore, the Zn-ion hybrid capacitor also exhibits a specific capacity of up to 139.1 mA h g-1 under conditions of 0.2 A g-1. This work offers a simple method in preparation of coal-based porous carbon with controllable pore structure 
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700 1 |a Feng, Xia  |e verfasserin  |4 aut 
700 1 |a Ma, Rui  |e verfasserin  |4 aut 
700 1 |a Sheng, Rui  |e verfasserin  |4 aut 
700 1 |a Wang, Danting  |e verfasserin  |4 aut 
700 1 |a Chen, Feifei  |e verfasserin  |4 aut 
700 1 |a Wang, Yuanyuan  |e verfasserin  |4 aut 
700 1 |a Xu, Mengjiao  |e verfasserin  |4 aut 
700 1 |a Ai, Lili  |e verfasserin  |4 aut 
700 1 |a Guo, Nannan  |e verfasserin  |4 aut 
700 1 |a Wang, Luxiang  |e verfasserin  |4 aut 
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