Mesopore- and Macropore-Dominant Nitrogen-Doped Hierarchically Porous Carbons for High-Energy and Ultrafast Supercapacitors in Non-Aqueous Electrolytes

2017 ◽  
Vol 9 (49) ◽  
pp. 42797-42805 ◽  
Author(s):  
Rong Shao ◽  
Jin Niu ◽  
Jingjing Liang ◽  
Mengyue Liu ◽  
Zhengping Zhang ◽  
...  
Keyword(s):  
High Energy ◽  
Aqueous Electrolytes ◽  
Porous Carbons ◽  
Hierarchically Porous ◽  
Nitrogen Doped

scholarly journals Nitrogen-Doped Hierarchically Porous Carbons Derived from Polybenzoxazine for Enhanced Supercapacitor Performance

Nanomaterials ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 131 ◽  
Author(s):  
Yanhui Wang ◽  
Liyan Dong ◽  
Guiping Lai ◽  
Meng Wei ◽  
Xingbi Jiang ◽  
...  
Keyword(s):  
Pore Structure ◽  
Rate Capability ◽  
Total Pore Volume ◽  
High Specific Capacitance ◽  
High Specific Surface Area ◽  
Koh Activation ◽  
Porous Carbons ◽  
Activation Temperature ◽  
Hierarchically Porous ◽  
Nitrogen Doped

Nitrogen-doped hierarchically porous carbons (HPCs), which are synthesized from benzoxazine resins, were successfully prepared following the processes of polymerization, carbonization, and potassium hydroxide (KOH) activation. As the key factor, the KOH activation temperature influences the pore structure and surface functionality, which are crucial for the excellent performance. The HPC-800 material, with the highest activation temperature (800 °C), displays a hierarchical pore structure, a high specific surface area (1812.4 m2·g−1), large total pore volume (0.98 cm3·g−1), high nitrogen content (1.27%), and remarkable electrical conductivity. It has also presented an excellent electrochemical performance of high specific capacitance of 402.4 F·g−1 at 0.1 A·g−1, excellent rate capability of 248.6 F·g−1 at 10 A·g−1, and long-term cycling stability with >99.0% capacitance retention after 500 cycles at 1 A·g−1 in 6 M KOH aqueous solution.

scholarly journals Nitrogen-decorated, porous carbons derived from waste cow manure as efficient catalysts for the selective capture and conversion of CO2

RSC Advances ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 4925-4931 ◽  
Author(s):  
Weiping Kong ◽  
Jing Liu
Keyword(s):  
Cow Manure ◽  
Porous Carbons ◽  
Hierarchically Porous ◽  
Nitrogen Doped

Nitrogen-doped, hierarchically porous carbons were prepared by the activation of waste cow manure at 600 °C, which acted as efficient catalysts for the highly selective capture and conversion of CO2into valuable chemicals.

Fe–Nxmoiety-modified hierarchically porous carbons derived from porphyra for highly effective oxygen reduction reaction

2017 ◽  
Vol 5 (4) ◽  
pp. 1526-1532 ◽  
Author(s):  
Zhengping Zhang ◽  
Xinjin Gao ◽  
Meiling Dou ◽  
Jing Ji ◽  
Feng Wang
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Porous Carbon ◽  
Catalytic Performance ◽  
Reduction Reaction ◽  
Porous Carbons ◽  
Hierarchically Porous ◽  
Nitrogen Doped ◽  
Highly Effective ◽  
Excellent Catalytic Performance

Fe–Nxmoiety-modified nitrogen-doped hierarchically porous carbon, which is derived from porphyra, exhibits an excellent catalytic performance for oxygen reduction.

scholarly journals Nitrogen doped and hierarchically porous carbons derived from chitosan hydrogel via rapid microwave carbonization for high-performance supercapacitors

Carbon ◽  
2017 ◽  
Vol 122 ◽  
pp. 592-603 ◽  
Author(s):  
Baoqiang Li ◽  
Yinfeng Cheng ◽  
Longpei Dong ◽  
Yaming Wang ◽  
Junchen Chen ◽  
...  
Keyword(s):  
High Performance ◽  
Porous Carbons ◽  
Chitosan Hydrogel ◽  
Hierarchically Porous ◽  
Nitrogen Doped

Fabrication of nitrogen-doped hierarchically porous carbons through a hybrid dual-template route for CO2 capture and haemoperfusion

Carbon ◽  
2014 ◽  
Vol 76 ◽  
pp. 84-95 ◽  
Author(s):  
Rui-Lin Liu ◽  
Wen-Juan Ji ◽  
Tian He ◽  
Zhi-Qi Zhang ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Co2 Capture ◽  
Porous Carbons ◽  
Hierarchically Porous ◽  
Nitrogen Doped

scholarly journals Ethylenediamine-Catalyzed Preparation of Nitrogen-Doped Hierarchically Porous Carbon Aerogel under Hypersaline Condition for High-Performance Supercapacitors and Organic Solvent Absorbents

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 771 ◽  
Author(s):  
Jing Gao ◽  
Xuan Zhang ◽  
Jiaxing Yang ◽  
Junxi Zhou ◽  
Mingxing Tong ◽  
...  
Keyword(s):  
High Performance ◽  
Electrochemical Impedance ◽  
High Specific Capacitance ◽  
Carbon Aerogel ◽  
High Energy ◽  
High Energy Density ◽  
Hierarchically Porous ◽  
Nitrogen Doped ◽  
Symmetric Supercapacitor ◽  
Hypersaline Condition

The simple and cost-efficient preparation of high-performance nitrogen-doped carbon aerogel (N-CA) for supercapacitors and other applications is still a big challenge. In this work, we have presented a facile strategy to synthesize hierarchically porous N-CA, which is based on solvothermal polymerization of phenol and formaldehyde under hypersaline condition with ethylenediamine (EDA) functioning as both a catalyst and a nitrogen precursor. Benefited from the catalytic effect of EDA on the polymerization, the obtained N-CA has a predominant amount of micropores (micropore ratio: 52%) with large specific surface area (1201.1 m2·g−1). In addition, nitrogen doping brings N-CA enhanced wettability and reduced electrochemical impedance. Therefore, the N-CA electrode shows high specific capacitance (426 F·g−1 at 1 A·g−1 in 0.5 M H2SO4) and excellent cycling stability (104% capacitance retention after 10,000 cycles) in three-electrode systems. Besides, a high energy density of 32.42 Wh·kg−1 at 800 W·kg−1 can be achieved by symmetric supercapacitor based on the N-CA electrodes, showing its promising application for energy storage. Furthermore, N-CA also exhibits good capacity and long recyclability in the absorption of organic solvents.

Efficient utilization of crude bio-oil: synthesizing of nitrogen-doped hierarchically porous carbons as electrocatalysts for oxygen reduction reaction

2021 ◽  
Author(s):  
Jiahuan Xu ◽  
Beichen Xue ◽  
Chao Liu ◽  
Chunlin Xia ◽  
Ming Li ◽  
...  
Keyword(s):  
Liquid Product ◽  
Thermal Conversion ◽  
Reduction Reaction ◽  
Porous Carbons ◽  
High Carbon ◽  
Efficient Utilization ◽  
High Carbon Content ◽  
Hierarchically Porous ◽  
Nitrogen Doped ◽  
Bio Oil

Bio-oil, the unavoidable liquid product of the thermal conversion of biomass, shows high carbon content and aromatic compounds to be a promising carbon precursor. Herein, nitrogen-doped hierarchically porous carbons (NHPCs)...

Effect of aqueous electrolytes on the electrochemical behaviors of supercapacitors based on hierarchically porous carbons

2012 ◽  
Vol 216 ◽  
pp. 290-296 ◽  
Author(s):  
Xiaoyan Zhang ◽  
Xianyou Wang ◽  
Lanlan Jiang ◽  
Hao Wu ◽  
Chun Wu ◽  
...  
Keyword(s):  
Aqueous Electrolytes ◽  
Porous Carbons ◽  
Electrochemical Behaviors ◽  
Hierarchically Porous

scholarly journals 1.8 V Aqueous Symmetric Carbon-Based Supercapacitors with Agarose-Bound Activated Carbons in an Acidic Electrolyte

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1731
Author(s):  
Chih-Chung Lai ◽  
Feng-Hao Hsu ◽  
Su-Yang Hsu ◽  
Ming-Jay Deng ◽  
Kueih-Tzu Lu ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Sulfuric Acid ◽  
Energy Density ◽  
Activated Carbons ◽  
High Energy ◽  
Aqueous Electrolytes ◽  
Alternative Material ◽  
Aqueous Cells ◽  
Acidic Electrolyte ◽  
Cycling Behavior

The specific energy of an aqueous carbon supercapacitor is generally small, resulting mainly from a narrow potential window of aqueous electrolytes. Here, we introduced agarose, an ecologically compatible polymer, as a novel binder to fabricate an activated carbon supercapacitor, enabling a wider potential window attributed to a high overpotential of the hydrogen-evolution reaction (HER) of agarose-bound activated carbons in sulfuric acid. Assembled symmetric aqueous cells can be galvanostatically cycled up to 1.8 V, attaining an enhanced energy density of 13.5 W h/kg (9.5 µW h/cm2) at 450 W/kg (315 µW/cm2). Furthermore, a great cycling behavior was obtained, with a 94.2% retention of capacitance after 10,000 cycles at 2 A/g. This work might guide the design of an alternative material for high-energy aqueous supercapacitors.

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