Enhancing the performance of supercapacitor electrode from chemical activation of carbon nanofibers derived Areca catechu husk via one-stage integrated pyrolysis

2020 ◽  
Author(s):  
Erman Taer ◽  
Friska Febriyanti ◽  
Widya Sinta Mustika ◽  
Rika Taslim ◽  
Agustino Agustino ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Chemical Activation ◽  
Supercapacitor Electrode ◽  
One Stage ◽  
Areca Catechu

N-Doped Porous Carbon Nanofibers/Porous Silver Network Hybrid for High-Rate Supercapacitor Electrode

2017 ◽  
Vol 9 (36) ◽  
pp. 30832-30839 ◽  
Author(s):  
Qingshi Meng ◽  
Kaiqiang Qin ◽  
Liying Ma ◽  
Chunnian He ◽  
Enzuo Liu ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Porous Carbon ◽  
High Rate ◽  
Supercapacitor Electrode ◽  
Porous Silver

scholarly journals Microporosity Development of Herringbone Carbon Nanofibers by RbOH Chemical Activation

2009 ◽  
Vol 2009 ◽  
pp. 1-5 ◽  
Author(s):  
Vicente Jiménez ◽  
Paula Sánchez ◽  
Fernando Dorado ◽  
José Luís Valverde ◽  
Amaya Romero
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Carbon Nanofibers ◽  
Flow Rate ◽  
Chemical Activation ◽  
Micropore Volume ◽  
Structure Development ◽  
Activation Temperature ◽  
Activating Agent ◽  
Activation Conditions

The influence of different activation conditions, including activating agent/CNFs ratio, activation temperature, and He flow rate, on the pore structure development of herringbone carbon nanofibers (CNFs) was studied. The best results of activated CNFs with larger specific surface area can be achieved using the following optimized factors: RbOH/CNFs ratio = 4/1, activation temperature = ,and a He flow rate = 850 ml/min. The optimization of these three factors leads to high CNFs micropore volume, being the surface area increased by a factor of 3 compared to the raw CNFs. It is important to note that only the creation of micropores (ultramicropores principally) took place, and mesopores were not generated if compared with raw CNFs.

Bubble Carbon-nanofibers Decorated with MnO2 Nanosheets as High-Performance Supercapacitor Electrode

2016 ◽  
Vol 222 ◽  
pp. 1931-1939 ◽  
Author(s):  
Haitao Zhao ◽  
Weihua Han ◽  
Wei Lan ◽  
Jinyuan Zhou ◽  
Zemin Zhang ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
High Performance ◽  
Supercapacitor Electrode ◽  
Mno2 Nanosheets

Influence of the chemical activation of carbon nanofibers on their use as catalyst support

2011 ◽  
Vol 393 (1-2) ◽  
pp. 78-87 ◽  
Author(s):  
Antonio Nieto-Márquez ◽  
Vicente Jiménez ◽  
Antonio Manuel Raboso ◽  
Sonia Gil ◽  
Amaya Romero ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Chemical Activation ◽  
Catalyst Support

scholarly journals Highly Porous Graphitic Activated Carbons from Lignite via Microwave Pretreatment and Iron-Catalyzed Graphitization at Low-Temperature for Supercapacitor Electrode Materials

Processes ◽  
2019 ◽  
Vol 7 (5) ◽  
pp. 300 ◽  
Author(s):  
Dongdong Liu ◽  
Xiaoman Zhao ◽  
Rui Su ◽  
Zhengkai Hao ◽  
Boyin Jia ◽  
...  
Keyword(s):  
Low Temperature ◽  
Electrode Materials ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Scale Up ◽  
Physical Activation ◽  
Supercapacitor Electrode ◽  
Microwave Pretreatment ◽  
Wide Range ◽  
Highly Porous

At present, the preparation of highly porous graphitic activated carbons (HPGACs) using the usual physical and chemical activation methods has met a bottleneck. In this study, HPGACs are directly synthesized from lignite at 900 °C. The whole process is completed by a microwave pretreatment, a graphitization conversion of the carbon framework at a low temperature using a small amount of FeCl3 (10–30 wt%), and a subsequent physical activation using CO2. Consequently, the dispersed and mobile iron species, in the absence of oxygen functional groups (removed during the microwave pretreatment), can greatly promote catalytic graphitization during pyrolysis, and, as an activating catalyst, can further facilitate the porosity development during activation. The as-obtained AC-2FeHLH-5-41.4(H) presents a low defect density, high purity, and specific surface area of 1852.43 m2 g−1, which is far greater than the AC-HLH-5-55.6(H) obtained solely by physical activation. AC-2FeHLH-5-41.4(H) as a supercapacitor electrode presents an excellent performance in the further electrochemical measurements. Such a convenient and practical method with low cost proves a scalable method to prepare HPGACs from a wide range of coal/biomass materials for industrial scale-up and applications.

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