scholarly journals B, N-dual doped sisal-based multiscale porous carbon for high-rate supercapacitors

RSC Advances ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 1476-1486 ◽  
Author(s):  
Heng Wu ◽  
Wenyu Yuan ◽  
Yingxin Zhao ◽  
Daoyang Han ◽  
Xiaowen Yuan ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Porous Structure ◽  
Porous Carbon ◽  
High Rate ◽  
Supercapacitor Electrode

B, N dual-doped sisal-based activated carbon (BN-SAC) with a multiscale porous structure for high-rate supercapacitor electrode was prepared through a novel and facile strategy.

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

Transient, in situ synthesis of ultrafine ruthenium nanoparticles for a high-rate Li–CO2 battery

2019 ◽  
Vol 12 (3) ◽  
pp. 1100-1107 ◽  
Author(s):  
Yun Qiao ◽  
Shaomao Xu ◽  
Yang Liu ◽  
Jiaqi Dai ◽  
Hua Xie ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Porous Structure ◽  
Carbon Nanofibers ◽  
In Situ Synthesis ◽  
High Rate ◽  
Ruthenium Nanoparticles ◽  
High Performing ◽  
Activated Carbon Nanofibers ◽  
Ru Nanoparticles

Ultrafine Ru nanoparticles anchored on freestanding activated carbon nanofibers with porous structure are synthesized as a high performing cathode for Li–CO2 batteries via a transient, in situ thermal shock method.

STRUCTURE AND SORPTION PROPERTIES OF POROUS CARBON SORBENTS FROM ASPEN BARK

2019 ◽  
pp. 325-333
Author(s):  
Evgeniya Vladimirovna Veprikova ◽  
Ivan Petrovich Ivanov ◽  
Nikolay Vasil'yevich Chesnokov ◽  
Boris Nikolayevich Kuznetsov
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Vitamin B12 ◽  
Porous Structure ◽  
Sorption Capacity ◽  
Sorption Properties ◽  
High Rate ◽  
Effect Of Temperature ◽  
Carbon Sorbents ◽  
Structure And Sorption Properties

The effect of temperature of aspen bark pre-carbonization on evolution of a porous structure and sorption properties of the carbon sorbents prepared in results of thermo alkaline activation of carbonizats with hydroxide potassium was studied.  The relationship of a sorption of methylene blue and vitamin B12 by the sorbents from aspen bark to a volume and size of pores was established. It was shown, that the carbon sorbents capacity at а methylene blue are defined by pores with width 0.86–2.95 nm, and at a vitamin B12 – 3.18–6.89 nm. Comparation of the porous structures parameters and sorption properties of the carbon sorbents from aspen bark and commercial activated carbon for medical purposes was maked. Kinetic of markers sorption onto sorbents with different porous structure was studied and the corresponding rate constants were calculated. The possibility preparation of a carbon sorbent have high rate of vitamin B12 sorption (rate constant is 3.953 min–1) was shown.  The determinations of a sorption capacity of sorbents in conditions assume at enterosorbents test were carry out. It was determined, that sorbents, prepped from aspen bark, exceeds the sample of industrial activated carbon for medical purposes at sorption capacity of methylene blue and vitamin B12 in 1.7 and 1.5 time, correspondingly.

scholarly journals Capacitive performance of porous carbon nanosheets derived from biomass cornstalk

RSC Advances ◽  
2017 ◽  
Vol 7 (2) ◽  
pp. 1067-1074 ◽  
Author(s):  
Hang Yu ◽  
Wenliang Zhang ◽  
Ting Li ◽  
Lei Zhi ◽  
Liqin Dang ◽  
...  
Keyword(s):  
Solid State ◽  
Porous Carbon ◽  
High Rate ◽  
Supercapacitor Electrode ◽  
Carbon Nanosheets ◽  
Capacitive Performance

Porous carbon nanosheets derived from naturally abundant cornstalk are reported as a high rate supercapacitor electrode in aqueous and solid-state PVA–KOH electrolyte.

scholarly journals Computer Analysis of the Effect of Activation Temperature on the Microporous Structure Development of Activated Carbon Derived from Common Polypody

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2951
Author(s):  
Mirosław Kwiatkowski ◽  
Jarosław Serafin ◽  
Andy M. Booth ◽  
Beata Michalkiewicz
Keyword(s):  
Activated Carbon ◽  
Porous Structure ◽  
Computer Analysis ◽  
Density Functional ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Geometrical Parameters ◽  
Activation Process ◽  
Microporous Structure ◽  
Activation Temperature

This paper presents the results of a computer analysis of the effect of activation process temperature on the development of the microporous structure of activated carbon derived from the leaves of common polypody (Polypodium vulgare) via chemical activation with phosphoric acid (H3PO4) at activation temperatures of 700, 800, and 900 °C. An unconventional approach to porous structure analysis, using the new numerical clustering-based adsorption analysis (LBET) method together with the implemented unique gas state equation, was used in this study. The LBET method is based on unique mathematical models that take into account, in addition to surface heterogeneity, the possibility of molecule clusters branching and the geometric and energy limitations of adsorbate cluster formation. It enabled us to determine a set of parameters comprehensively and reliably describing the porous structure of carbon material on the basis of the determined adsorption isotherm. Porous structure analyses using the LBET method were based on nitrogen (N2), carbon dioxide (CO2), and methane (CH4) adsorption isotherms determined for individual activated carbon. The analyses carried out showed the highest CO2 adsorption capacity for activated carbon obtained was at an activation temperature of 900 °C, a value only slightly higher than that obtained for activated carbon prepared at 700 °C, but the values of geometrical parameters determined for these activated carbons showed significant differences. The results of the analyses obtained with the LBET method were also compared with the results of iodine number analysis and the results obtained with the Brunauer–Emmett–Teller (BET), Dubinin–Radushkevich (DR), and quenched solid density functional theory (QSDFT) methods, demonstrating their complementarity.

Fe/Fe3C Embedded in N-Doped Worm-like Porous Carbon for High-Rate Catalysis in Rechargeable Zinc–Air Batteries

2021 ◽  
Author(s):  
Zheng Liu ◽  
Yanfei Zhu ◽  
Kuikui Xiao ◽  
Yali Xu ◽  
Yufan Peng ◽  
...  
Keyword(s):  
Porous Carbon ◽  
High Rate ◽  
Zinc Air Batteries

scholarly journals In Situ Fabrication of Activated Carbon from a Bio-Waste Desmostachya bipinnata for the Improved Supercapacitor Performance

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Gopal Krishna Gupta ◽  
Pinky Sagar ◽  
Sumit Kumar Pandey ◽  
Monika Srivastava ◽  
A. K. Singh ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Power Density ◽  
Supercapacitor Electrode ◽  
In Situ Fabrication ◽  
Transmission Electron ◽  
Good Energy ◽  
Supercapacitor Performance ◽  
Operating Potential

AbstractHerein, we demonstrate the fabrication of highly capacitive activated carbon (AC) using a bio-waste Kusha grass (Desmostachya bipinnata), by employing a chemical process followed by activation through KOH. The as-synthesized few-layered activated carbon has been confirmed through X-ray powder diffraction, transmission electron microscopy, and Raman spectroscopy techniques. The chemical environment of the as-prepared sample has been accessed through FTIR and UV–visible spectroscopy. The surface area and porosity of the as-synthesized material have been accessed through the Brunauer–Emmett–Teller method. All the electrochemical measurements have been performed through cyclic voltammetry and galvanometric charging/discharging (GCD) method, but primarily, we focus on GCD due to the accuracy of the technique. Moreover, the as-synthesized AC material shows a maximum specific capacitance as 218 F g−1 in the potential window ranging from − 0.35 to + 0.45 V. Also, the AC exhibits an excellent energy density of ~ 19.3 Wh kg−1 and power density of ~ 277.92 W kg−1, respectively, in the same operating potential window. It has also shown very good capacitance retention capability even after 5000th cycles. The fabricated supercapacitor shows a good energy density and power density, respectively, and good retention in capacitance at remarkably higher charging/discharging rates with excellent cycling stability. Henceforth, bio-waste Kusha grass-derived activated carbon (DP-AC) shows good promise and can be applied in supercapacitor applications due to its outstanding electrochemical properties. Herein, we envision that our results illustrate a simple and innovative approach to synthesize a bio-waste Kusha grass-derived activated carbon (DP-AC) as an emerging supercapacitor electrode material and widen its practical application in electrochemical energy storage fields.

A Layered-Nanospace-Confinement Strategy for the Synthesis of Two-Dimensional Porous Carbon Nanosheets for High-Rate Performance Supercapacitors

2014 ◽  
Vol 5 (7) ◽  
pp. 1401761 ◽  
Author(s):  
Xiaoming Fan ◽  
Chang Yu ◽  
Juan Yang ◽  
Zheng Ling ◽  
Chao Hu ◽  
...  
Keyword(s):  
Porous Carbon ◽  
High Rate ◽  
Two Dimensional ◽  
Rate Performance ◽  
Carbon Nanosheets ◽  
High Rate Performance
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