scholarly journals Effect of Thermochemical Modification of Activated Carbon Materials on Specific Capacity of Electrochemical Capacitors

2018 ◽  
Vol 16 (2) ◽  
Keyword(s):  
Activated Carbon ◽  
Carbon Materials ◽  
Specific Capacity ◽  
Electrochemical Capacitors ◽  
Thermochemical Modification

An effective approach for modifying carbonaceous materials with niobium single sites to improve their catalytic properties

2015 ◽  
Vol 44 (46) ◽  
pp. 19956-19965 ◽  
Author(s):  
A. S. Bozzi ◽  
R. L. Lavall ◽  
T. E. Souza ◽  
M. C. Pereira ◽  
P. P. de Souza ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Activated Carbon ◽  
Carbon Materials ◽  
Catalytic Properties ◽  
Carbonaceous Materials ◽  
Simple Route ◽  
Catalytically Active

In this paper we show a very simple route for the incorporation of catalytically active niobium species on the surface of carbon materials, such as graphene oxide, carbon nanotubes and activated carbon.

scholarly journals Surface-modified spherical activated carbon materials for pre-combustion carbon dioxide capture

RSC Advances ◽  
2015 ◽  
Vol 5 (42) ◽  
pp. 33681-33690 ◽  
Author(s):  
Nannan Sun ◽  
Chenggong Sun ◽  
Jingjing Liu ◽  
Hao Liu ◽  
Colin E. Snape ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbon ◽  
Carbon Materials ◽  
Carbon Dioxide Capture ◽  
Spherical Activated Carbon ◽  
Surface Modified

Carbon beads exhibiting potential in practical pre-combustion CO2 capture were prepared.

Increase the Microporosity and CO2 Adsorption of a Commercial Activated Carbon

2015 ◽  
Vol 749 ◽  
pp. 17-21 ◽  
Author(s):  
Joanna Sreńscek Nazzal ◽  
Karolina Glonek ◽  
Jacek Młodzik ◽  
Urszula Narkiewicz ◽  
Antoni W. Morawski ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Carbon Materials ◽  
Micropore Volume ◽  
Microporous Carbon ◽  
Microporous Carbons ◽  
Adsorption Capacities

Microporous carbons prepared from commercial activated carbon WG12 by KOH and/or ZnCl2 treatment were examined as adsorbents for CO2 capture. The micropore volume and specific surface area of the resulting carbons varied from 0.52 cm3/g (1374 m2/g) to 0.70 cm3/g (1800 m2/g), respectively. The obtained microporous carbon materials showed high CO2 adsorption capacities at 40 bar pressure reaching 16.4 mmol/g.

scholarly journals Morphology, Conductivity and Electrochemical Properties of Hydrothermal Carbonized Porous Carbon Materials

2016 ◽  
Vol 3 (1) ◽  
pp. 46-55
Author(s):  
N. Nagirna ◽  
V. Mandzyuk
Keyword(s):  
Electrochemical Properties ◽  
Porous Carbon ◽  
Carbon Materials ◽  
Specific Capacity ◽  
Carbonization Temperature ◽  
Electrochemical System ◽  
Plant Materials ◽  
Temperature Growth ◽  
Raw Plant Materials ◽  
Volume Decrease

The paper studies the morphology, conductivity and electrochemical properties ofcarbon materials, obtained from raw plant materials at different condition of hydrothermalcarbonization, using low-temperature porometry, impedance spectroscopy and galvanostaticcharge/discharge. It is set, that in porous structure of carbon materials micropores are dominant;when carbonization temperature increased the specific surface and pore volume decrease morethan 10 times. The temperature growth results in increasing the electrical conductivity of thecarbon material more than 6 orders. It is found, that the maximal value of specific capacity(1138 mА·h/g) has an electrochemical system based on porous carbon carbonized at 1023 K

scholarly journals CARBON FIBERS MODIFIED WITH TRANSITION METAL OXIDES FOR As(V) REMOVAL FROM SOLUTIONS

2018 ◽  
Vol 59 (9) ◽  
pp. 31
Author(s):  
Larisa A. Zemskova ◽  
Alexey V. Voit ◽  
Darya H. Shlyk ◽  
Nikolaiy N. Barinov
Keyword(s):  
Activated Carbon ◽  
Transition Metal ◽  
Metal Oxides ◽  
Manganese Oxide ◽  
Carbon Fibers ◽  
Transition Metal Oxides ◽  
Carbon Materials ◽  
Sorption Isotherms ◽  
Purification Of Water

Perspectives of use of activated carbon materials modified with transition metal oxides for purification of water from arsenic were considered. Sorption isotherms for two types of hybrid sorbents based on carbon fibers modified with manganese oxide as birnessite as well as on fiber and chitosan-carbon materials on its basic modified with molybdenum determining affinity of the sorbents to arsenate-ions are presented.

Effect of Fluorine Content on the Electrochemical Properties of PVDF-Derived Carbons for Lithium Ion Battery

2012 ◽  
Vol 463-464 ◽  
pp. 730-733 ◽  
Author(s):  
Lu Shi ◽  
Chao Lin Miao ◽  
Gai Rong Chen ◽  
Bin Xu ◽  
Shi Chen
Keyword(s):  
Electrochemical Properties ◽  
Carbon Materials ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Fluorine Content ◽  
Lithium Ion ◽  
Bet Surface Area ◽  
Different Temperatures ◽  
Positive Effect ◽  
Initial Coulombic Efficiency

The carbon materials prepared by PVDF carbonization at different temperatures have similar BET surface area and pores volume. The content of fluorine in the carbons decreased with the carbonization temperature from 1.46% (atm %) at 600°C to 0.18 %( atm %) at 1000°C. The first cycle specific capacity and the initial coulombic efficiency decreases with the decrease of fluorine content in the samples. The first cycle discharge capacity decreased from 982 mAh/ g at 600°C to 752 mAh/ g at 1000°C and the initial coulombic efficiency decreased from 31.8% at 600°C to 24% at 1000°C. It is believed that fluorine contained in the carbon materials has a positive effect to improve the electrochemical properties as anode materials for Li-ion batteries.

Porous Activity of Biomass-Activated Carbon Enhanced by Nitrogen-Dopant Towards High-Performance Lithium Ion Hybrid Battery-Supercapacitor

2021 ◽  
Author(s):  
Juan Yu ◽  
Xuyang Wang ◽  
Jiaxin Peng ◽  
Xuefeng Jia ◽  
Linbo Li ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Storage ◽  
Pore Structure ◽  
High Performance ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Utilization Efficiency ◽  
Energy Storage Devices ◽  
Storage Devices

Abstract Biomass-activated carbon materials are promising electrode materials for lithium-ion hybrid capacitors (LiCs) because of their natural hierarchical pore structure. The efficient utilization of structural pores in activated carbon is very important for their electrochemical performance. Herein, porous biomass-activated carbon (PAC) with large specific surface area was prepared using a one-step activation method with biomass waste as the carbon source and ZnCl2 as the activator. To further improve its pore structure utilization efficiency, the PAC was doped with nitrogen using urea as the nitrogen source. The experimental results confirmed that PAC-1 with a high nitrogen doping level of 4.66% exhibited the most efficient pore utilization among all the samples investigated in this study. PAC-1 exhibited 92% capacity retention after 8000 cycles, showing good cycling stability. Then, to maximize the utilization of high-efficiency energy storage devices, LiNi0.8Co0.15Al0.05O2 (NCA), a promising cathode material for lithium-ion batteries with high specific capacity, was compounded with PAC-1 in different ratios to obtain NCA@PC composites. The NCA@PC-9 composite exhibited excellent capacitance in LiCs and an energy density of 210.9 Wh kg-1 at a high power density of 13.3 kW kg-1. These results provide guidelines for the design of high-performance and low-cost energy storage devices.

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