Synthesis free‐template highly micro‐mesoporous carbon nanosheet as electrode materials for boosting supercapacitor performances. (8th August 2022)

• Record Type: Journal Article
• Authors: Taer, Erman; Apriwandi, Apriwandi; Mardiah, Miftah Ainul; Awitdrus, ; Taslim, Rika
• Is Part Of: International journal of energy research. Volume 46:Number 13(2022)
• Page Start: 18740
• Page End: 18756
• Publication Date: 2022-08-08
• Subjects: bio‐waste -- electrode materials -- nanosheet -- sub‐ultra‐micropores -- supercapacitor; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.8493
• Languages: English
• ISSNs: 0363-907X

Abstract

Summary: Porous carbon 2D nanosheets (CNSs) with micro‐mesopores interconnected are indispensable for energy conversion systems and storage applications. Herein, we synthesize free‐template highly micro‐mesoporous carbon nanosheet as electrode material for boosting supercapacitor performances. The activated carbon nanosheets derived from bio‐waste were prepared by chemical impregnation followed by high‐temperature pyrolysis without hard/soft/salt template‐assisted and free‐binder adhesives. Garlic skin wastes were selected as a precursor. Furthermore, activated carbon was designed in pellet/coin solids without the addition of binder materials. The porous carbon pellets exhibit a thin 2D nanosheet structure of 15 nm followed by unique wooden labyrinth‐like and rod‐like structures. The result showed that the impregnation of different chemical concentrations increases the surface area to 273% as high as 1002.920 m 2 g −1 with a total volume of 1.3270 cm 3 g −1 . Moreover, the mesoporosity dominated 66.4%, followed by sub‐ultra‐micropores. In the symmetric supercapacitor, the carbon nanosheet boosted the specific capacitance almost 3‐fold to 320.95 F g −1 in the aqueous electrolyte of 1 M H2 SO4 . The supercapacitor cell has a high energy density of 43.12 Wh kg −1 and power density of 161.99 W kg −1 at a constant current density of 1.0 A g −1 . This work proposes a more effective, green, efficient, and controlled approach to obtain bio‐waste‐based porous carbon 2D nanosheet with a controlled pore structure for energy conversion and storage systems. Novelty Statement: The novelty of this study is a green synthesis has possessed highly micro‐mesopores nanosheet bio‐waste. 2D nanosheet was prepared free‐template and free‐binder. Sub‐ultra‐micropores were confirmed with dominated mesoporosity of 66.8%. Carbon nanosheet boosted specific capacitance almost 3‐fold to 320.95 F g −1 . Abstract : A green synthesis has possessed highly micro‐mesopores nanosheet bio‐waste. 2D nanosheet was prepared green‐free‐template and free‐binder. Sub‐ultra‐micropores were confirmed with dominated mesoporosity of 66.8%. Carbon nanosheet boosted specific capacitance almost 3‐fold to 320.92 F g −1 .