scholarly journals Nanoarchitectonics of Nanoporous Carbon Materials in Supercapacitors Applications

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 639 ◽  
Author(s):  
Rekha Goswami Shrestha ◽  
Subrata Maji ◽  
Lok Kumar Shrestha ◽  
Katsuhiko Ariga
Keyword(s):  
Surface Area ◽  
High Performance ◽  
Carbon Materials ◽  
Nanoporous Carbon ◽  
Agricultural Wastes ◽  
Superior Performance ◽  
Nanoporous Structure ◽  
Porous Carbons ◽  
Hierarchical Porous ◽  
Nanoporous Carbon Materials

High surface area and large pore volume carbon materials having hierarchical nanoporous structure are required in high performance supercapacitors. Such nanoporous carbon materials can be fabricated from organic precursors with high carbon content, such as synthetic biomass or agricultural wastes containing cellulose, hemicellulose, and lignin. Using recently developed unique concept of materials nanoarchitectonics, high performance porous carbons with controllable surface area, pore size distribution, and hierarchy in nanoporous structure can be fabricated. In this review, we will overview the recent trends and advancements on the synthetic methods for the production of hierarchical porous carbons with one- to three-dimensional network structure with superior performance in supercapacitors applications. We highlight the promising scope of accessing nanoporous graphitic carbon materials from: (i) direct conversion of single crystalline self-assembled fullerene nanomaterials and metal organic frameworks, (ii) hard- and soft-templating routes, and (iii) the direct carbonization and/or activation of biomass or agricultural wastes as non-templating routes. We discuss the appealing points of the different synthetic carbon sources and natural precursor raw−materials derived nanoporous carbon materials in supercapacitors applications.

scholarly journals Macroalgae-derived nitrogen-doped hierarchical porous carbons with high performance for H2 storage and supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (52) ◽  
pp. 32795-32805 ◽  
Author(s):  
Xingxing Wu ◽  
Zhongwei Tian ◽  
Langqing Hu ◽  
Sha Huang ◽  
Jinjun Cai
Keyword(s):  
Surface Area ◽  
Pore Volume ◽  
High Performance ◽  
Enteromorpha Prolifera ◽  
Porous Carbons ◽  
Excellent Performance ◽  
Nitrogen Doped ◽  
Hierarchical Porous ◽  
Hierarchical Porous Carbons

Enteromorpha prolifera was converted into hierarchical carbons through the carbonization and activation with surface area and pore volume up to 3345 m2 g−1 and 1.94 cm3 g−1, showing excellent performance for H2 storage and supercapacitors.

scholarly journals Rice Husk-Derived High Surface Area Nanoporous Carbon Materials with Excellent Iodine and Methylene Blue Adsorption Properties

2019 ◽  
Vol 5 (1) ◽  
pp. 10 ◽  
Author(s):  
Lok Shrestha ◽  
Mamata Thapa ◽  
Rekha Shrestha ◽  
Subrata Maji ◽  
Raja Pradhananga ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Surface Area ◽  
Rice Husk ◽  
Carbon Materials ◽  
High Surface ◽  
High Surface Area ◽  
Nanoporous Carbon ◽  
Adsorption Properties ◽  
Methylene Blue Adsorption ◽  
Nanoporous Carbon Materials

Iodine and methylene blue adsorption properties of the high surface area nanoporous carbon materials derived from agro-waste and rice husk is reported. Rice husk was pre-carbonized at 300 °C in air followed by leaching out the silica nanoparticles by extraction with sodium hydroxide solution. The silica-free rice husk char was mixed with chemical activating agents sodium hydroxide (NaOH), zinc chloride (ZnCl2), and potassium hydroxide (KOH) separately at a mixing ratio of 1:1 (wt%) and carbonized at 900 °C under a constant flow of nitrogen. The prepared carbon materials were characterized by scanning electron microscopy (SEM), Fourier transformed-infrared spectroscopy (FT-IR), powder X-ray diffraction (pXRD), and Raman scattering. Due to the presence of bimodal micro- and mesopore structures, KOH activated samples showed high specific surface area ca. 2342 m2/g and large pore volume ca. 2.94 cm3/g. Oxygenated surface functional groups (hydroxyl, carbonyl, and carboxyl) were commonly observed in all of the samples and were essentially non-crystalline porous particle size of different sizes (<200 μm). Adsorption study revealed that KOH activated samples could be excellent material for the iodine and methylene blue adsorption from aqueous phase. Iodine and methylene blue number were ca. 1726 mg/g and 608 mg/g, respectively. The observed excellent iodine and methylene blue adsorption properties can be attributed to the well-developed micro- and mesopore structure in the carbon material. This study demonstrates that the agricultural waste, rice husk, and derived nanoporous carbon materials would be excellent adsorbent materials in water purifications.

scholarly journals Nanoporous Carbon Materials Derived from Washnut Seed with Enhanced Supercapacitance

Materials ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2371 ◽  
Author(s):  
Ram Lal Shrestha ◽  
Timila Shrestha ◽  
Birendra Man Tamrakar ◽  
Rekha Goswami Shrestha ◽  
Subrata Maji ◽  
...  
Keyword(s):  
Surface Area ◽  
Electrode Materials ◽  
Carbon Materials ◽  
Activated Carbons ◽  
Low Cost ◽  
Rate Capability ◽  
Nanoporous Carbon ◽  
High Rate ◽  
Supercapacitor Electrode ◽  
Nanoporous Carbon Materials

Nanoporous activated carbons-derived from agro-waste have been useful as suitable and scalable low-cost electrode materials in supercapacitors applications because of their better surface area and porosity compared to the commercial activated carbons. In this paper, the production of nanoporous carbons by zinc chloride activation of Washnut seed at different temperatures (400–1000 °C) and their electrochemical supercapacitance performances in aqueous electrolyte (1 M H2SO4) are reported. The prepared nanoporous carbon materials exhibit hierarchical micro- and meso-pore architectures. The surface area and porosity increase with the carbonization temperature and achieved the highest values at 800 °C. The surface area was found in the range of 922–1309 m2 g−1. Similarly, pore volume was found in the range of 0.577–0.789 cm3 g−1. The optimal sample obtained at 800 °C showed excellent electrochemical energy storage supercapacitance performance. Specific capacitance of the electrode was calculated 225.1 F g−1 at a low current density of 1 A g−1. An observed 69.6% capacitance retention at 20 A g−1 indicates a high-rate capability of the electrode materials. The cycling stability test up to 10,000 cycles revealed the outstanding stability of 98%. The fascinating surface textural properties with outstanding electrochemical performance reveal that Washnut seed would be a feasible agro-waste precursor to prepare nanoporous carbon materials as a low-cost and scalable supercapacitor electrode.

scholarly journals Modeling of Forming a Nanoporous Structure of Carbon Materials for Electrodes of Electrochemical Capacitors

2020 ◽  
Vol 21 (2) ◽  
pp. 199-203
Author(s):  
B.K. Ostafiychuk ◽  
Z.M. Lyubun ◽  
R.P. Lisovskiy ◽  
M.I. Moiseienko ◽  
B.I. Rachiy ◽  
...  
Keyword(s):  
Neural Network ◽  
Physical Properties ◽  
Porous Structure ◽  
Electrode Material ◽  
Electric Double Layer ◽  
Carbon Materials ◽  
Nanoporous Carbon ◽  
Nanoporous Structure ◽  
Double Layer Capacitors ◽  
Nanoporous Carbon Materials

The paper presents the results of predicting the physical properties of nanoporous carbon materials during synthesis with their subsequent use as an electrode material for electric double-layer capacitors. It has been established a multilayer neural network can be used to predict the sorption properties of nanoporous carbon materials. A multilayer neural network confirms the experimental dependences of the characteristics of nanoporous carbon materials porous structure on the technological conditions of its obtaining.

Facile synthesis of nitrogen-enriched nanoporous carbon materials for high performance supercapacitors

2019 ◽  
Vol 538 ◽  
pp. 199-208 ◽  
Author(s):  
Dandan Guo ◽  
Jin Qian ◽  
Ranran Xin ◽  
Zhen Zhang ◽  
Wei Jiang ◽  
...  
Keyword(s):  
High Performance ◽  
Carbon Materials ◽  
Nanoporous Carbon ◽  
Facile Synthesis ◽  
Nanoporous Carbon Materials
Sign in / Sign up

Export Citation Format

Share Document