Effects of acid treatment on the improvement of specific capacitance and deionization efficiency of porous carbon electrodes

2009 ◽  
Vol 9 (2) ◽  
pp. 159-165 ◽  
Author(s):  
R. L. Machunda ◽  
H. Jeon ◽  
J. K. Lee ◽  
J. Lee
Keyword(s):  
Functional Groups ◽  
Porous Carbon ◽  
Acid Treatment ◽  
Carbon Cloth ◽  
Capacitive Deionization ◽  
Surface Functional Groups ◽  
Activated Carbon Cloth ◽  
Porous Carbon Electrodes ◽  
Solution Surface ◽  
A Current

We report the effect of acid treatment on porous carbon materials on their double layer capacitance and electrosorption of ions in capacitive deionization systems. The as-received activated carbon cloth (ACC) had the capacitance value of 210 F/g and was markedly (∼175%) improved when treated with acid solution. Surface functional groups such as hydroxyl, quinines, lactones and ethers on carbon after modification were increased by 40% and 29% with HNO3 and H2SO4 respectively. In capacitive deionization test of NaCl solution, the ACC treated with HNO3 had more than two times removal efficiency when charged with a 1.5 V current than the untreated one. This is attributed to activation and changes of surface functional groups when charged with a current.

scholarly journals Determination of surface functional groups on mechanochemically activated carbon cloth by Boehm method

Tehnika ◽  
2014 ◽  
Vol 69 (3) ◽  
pp. 367-372
Author(s):  
Anđelka B. Đukić ◽  
Nikola S. Vukelić ◽  
Bojana M. Paskaš-Mamula ◽  
Nikola B. Novaković ◽  
Radojka T. Vujasin ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Functional Groups ◽  
Carbon Cloth ◽  
Surface Functional Groups ◽  
Activated Carbon Cloth

A novel eutectic solvent precursor for efficiently preparing N-doped hierarchically porous carbon nanosheets with unique surface functional groups and micro-pores towards dual-carbon lithium-ion capacitors

2021 ◽  
Author(s):  
Kaixiang Zou ◽  
Yuanfu Deng ◽  
Weijing Wu ◽  
Shiwei Zhang ◽  
Guohua Chen
Keyword(s):  
Functional Groups ◽  
Porous Carbon ◽  
High Performance ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Surface Functional Groups ◽  
Carbon Nanosheets ◽  
Hierarchically Porous ◽  
Li Ion ◽  
Unique Surface

High performance carbon-based materials are ideal electrode materials for Li-ion capacitors (LICs), but there are still many challenges such as the complicated preparation preocesses, high cost and low yield. Also,...

Sorghum biomass-derived porous carbon electrodes for capacitive deionization and energy storage

2021 ◽  
Vol 312 ◽  
pp. 110757
Author(s):  
Minjun Kim ◽  
Hyunsoo Lim ◽  
Xingtao Xu ◽  
Md Shahriar A. Hossain ◽  
Jongbeom Na ◽  
...  
Keyword(s):  
Energy Storage ◽  
Porous Carbon ◽  
Carbon Electrodes ◽  
Capacitive Deionization ◽  
Porous Carbon Electrodes

Influence of pore structure and cell voltage of activated carbon cloth as a versatile electrode material for capacitive deionization

Carbon ◽  
2017 ◽  
Vol 122 ◽  
pp. 329-335 ◽  
Author(s):  
Choonsoo Kim ◽  
Pattarachai Srimuk ◽  
Juhan Lee ◽  
Simon Fleischmann ◽  
Mesut Aslan ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Pore Structure ◽  
Electrode Material ◽  
Cell Voltage ◽  
Carbon Cloth ◽  
Capacitive Deionization ◽  
Activated Carbon Cloth

Desalination and disinfection of inland brackish ground water in a capacitive deionization cell using nanoporous activated carbon cloth electrodes

Desalination ◽  
2015 ◽  
Vol 362 ◽  
pp. 126-132 ◽  
Author(s):  
Karthik Laxman ◽  
Myo Tay Zar Myint ◽  
Mohammed Al Abri ◽  
Priyanka Sathe ◽  
Sergey Dobretsov ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Ground Water ◽  
Carbon Cloth ◽  
Capacitive Deionization ◽  
Activated Carbon Cloth ◽  
Nanoporous Activated Carbon

scholarly journals Efficient Desalination of Brackish Ground Water via a Novel Capacitive Deionization Cell Using Nanoporous Activated Carbon Cloth Electrodes

2015 ◽  
Vol 12 (2) ◽  
pp. 22 ◽  
Author(s):  
K. Laxman ◽  
M.T.Z Myint ◽  
M. Al Abri ◽  
L. Al-Gharibi ◽  
B. Al Namani ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Ground Water ◽  
Brackish Water ◽  
Water Samples ◽  
Sea Water ◽  
Water Desalination ◽  
Carbon Cloth ◽  
Capacitive Deionization ◽  
Activated Carbon Cloth ◽  
Nanoporous Activated Carbon

Sea water intrusion in ground water sources has made brackish water desalination a necessity in Oman. The application of capacitive deionization (CDI) for the deionization of ground water samples from wells in Al-Musanaah Wilayat is proposed and demonstrated. A CDI cell is fabricated using nanoporous activated carbon cloth (ACC) as the electrodes and is shown to be power efficient for desalting ground water samples with total dissolved solids (TDS) of up to 4,000 mg/l. The CDI cell was able to remove up to 73% of the ionic scaling and fouling contaminants from brackish water samples. The power consumption for deionization of brackish water was estimated to be 1 kWh/m3 of desalinated water, which is much lower than the power required to process water with equivalent TDS by the reverse osmosis processes. The CDI process is elaborated, and observations and analysis of the ion adsorption characteristics and electrical properties of the capacitive cell are elucidated.  

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