Cyano Groups: New Active Sites of Porous Carbon Materials Achieving a Superior K-ion Storage

Carbon ◽  
2021 ◽  
Author(s):  
Xiang Gao ◽  
Wei Liu ◽  
Tianqi Wang ◽  
Jingrou Dai ◽  
Yuanyuan Pan ◽  
...  
2020 ◽  
pp. 174751982094336
Author(s):  
Shuai Ru ◽  
Zhaoquan Ai

2,2’-Bipyridine with strong coordination ability for metal ions was used to prepare N-doped porous carbon materials by a facile method of solution agitation and annealing, with KOH as the activated solvent. Applied to supercapacitors, these porous carbon materials exhibit high specific capacitance and outstanding rate performance, which are attributed to their larger specific surface area, richer pore structure, and N-doping after KOH activation, leading to fast electron transport and increased ion storage in the unique architecture.


2020 ◽  
Vol 294 ◽  
pp. 109930 ◽  
Author(s):  
Yifan Hu ◽  
Ruguang Ma ◽  
Qiangjian Ju ◽  
Beibei Guo ◽  
Minghui Yang ◽  
...  

RSC Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 838-846
Author(s):  
Jun Kimura ◽  
Takahiro Ohkubo ◽  
Yuta Nishina ◽  
Koki Urita ◽  
Yasushige Kuroda

Porous BN with atomically heterogeneous surfaces can more strongly adsorb dinitrogen molecules than typical porous carbon materials.


Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 738
Author(s):  
Mohamed Gamal Mohamed ◽  
Mahmoud M. M. Ahmed ◽  
Wei-Ting Du ◽  
Shiao-Wei Kuo

In this study, we successfully synthesized two types of meso/microporous carbon materials through the carbonization and potassium hydroxide (KOH) activation for two different kinds of hyper-crosslinked polymers of TPE-CPOP1 and TPE-CPOP2, which were synthesized by using Friedel–Crafts reaction of tetraphenylethene (TPE) monomer with or without cyanuric chloride in the presence of AlCl3 as a catalyst. The resultant porous carbon materials exhibited the high specific area (up to 1100 m2 g−1), total pore volume, good thermal stability, and amorphous character based on thermogravimetric (TGA), N2 adsoprtion/desorption, and powder X-ray diffraction (PXRD) analyses. The as-prepared TPE-CPOP1 after thermal treatment at 800 °C (TPE-CPOP1-800) displayed excellent CO2 uptake performance (1.74 mmol g−1 at 298 K and 3.19 mmol g−1 at 273 K). Furthermore, this material possesses a high specific capacitance of 453 F g−1 at 5 mV s−1 comparable to others porous carbon materials with excellent columbic efficiencies for 10,000 cycle at 20 A g−1.


2021 ◽  
Author(s):  
Sirui Liu ◽  
Ya ping Xu ◽  
Jinggao Wu ◽  
Jing Huang

Supercapacitors are of paramount importance for next-generation applications, demonstrating high energy output, an ultra-long cycle life and utilizing green and sustainable materials. Herein, we utilize celery, a common biomass from...


RSC Advances ◽  
2021 ◽  
Vol 11 (26) ◽  
pp. 15639-15655
Author(s):  
Małgorzata Graś ◽  
Grzegorz Lota

The borohydride electrooxidation process is complex. Technological application of carbon materials is manifested not only in their use as a catalyst support, but also as a physical trap for hydrogen generated during the parasitic hydrolysis.


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