scholarly journals Cover Feature: Electrochemical Effect of Cokes‐Derived Activated Carbon with Partially Graphitic Structure for Hybrid Supercapacitors (ChemElectroChem 19/2021)

2021 ◽  
Vol 8 (19) ◽  
pp. 3585-3585
Author(s):  
Seo Hui Kang ◽  
Jun Hui Jeong ◽  
Ji Su Chae ◽  
Yun Chan Kang ◽  
Kwang Chul Roh
Keyword(s):  
Activated Carbon ◽  
Hybrid Supercapacitors ◽  
Graphitic Structure ◽  
Electrochemical Effect

High-performance activated carbon cathodes from green cokes for Zn-ion hybrid supercapacitors

Fuel ◽  
2021 ◽  
pp. 122485
Author(s):  
Xusheng Zhang ◽  
Xiaodong Tian ◽  
Yan Song ◽  
Jinru Wu ◽  
Tao Yang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
High Performance ◽  
Hybrid Supercapacitors

Electrochemical Performance of Lithium-Ion Hybrid Supercapacitors based on Activated Carbon and Nanoplatelet Li4Ti5O12 Insertion Electrode Synthesized by Nanoscission Technique

2015 ◽  
Vol 1740 ◽  
Author(s):  
Sandeep Singh ◽  
Alok C Rastogi ◽  
Fredrick Omenya ◽  
M Stanley Whittingham ◽  
Archit Lal ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Electrochemical Performance ◽  
Lithium Ion ◽  
Charge Transfer Resistance ◽  
Electrode Polarization ◽  
Hybrid Supercapacitor ◽  
Transfer Resistance ◽  
Hybrid Supercapacitors ◽  
Current Change ◽  
Kinetic Effects

ABSTRACTElectrochemical performance of hybrid supercapacitor (HSC) utilizing surface sculpted Li4Ti5O12 (LTO) insertion electrode having nanoplatelet-like morphology and activated carbon (AC) electrode is investigated for energy storage application. Cyclic voltammetry (CV) at variable scan rates 0.5 to 60 mV.s-1 in the 0-3.2 V range show pseusocapacitive behavior and fast rate of current change indicating rapid Faradaic kinetics. Nyquist impedance study show charge transfer resistance due to kinetic effects of electron transfer and Li+ de-intercalation process at the LTO anode. Low capacity (0.2 C-1C) charge-discharge (CD) curves show high Coulomb efficiency with marginal reduction at high 5-10 C rates due to irreversibility of adsorbed PF6 anions at the electrolyte-AC interface. Galvanostatic CD cycling tests over 50 cycles at different C-rates show decline in storage capacity due to electrode polarization effects. Reduction, broadening and shift of the Raman line at 678 cm-1 from Ti-O bonds in TiO6 octahedra after cycling indicates Li insertion reactions in functioning of hybrid supercapacitor. The hybrid supercapacitor cells have shown energy density, 29 Wh.kg-1 and power density, 350 W.kg-1.

Retransformed graphitic activated carbon from ionic liquid-derived carbon containing nitrogen

2015 ◽  
Vol 3 (6) ◽  
pp. 2564-2567 ◽  
Author(s):  
Mok-Hwa Kim ◽  
Sol Yun ◽  
Ho Seok Park ◽  
Joong Tark Han ◽  
Kwang-Bum Kim ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Activated Carbon ◽  
Surface Area ◽  
Chemical Activation ◽  
High Surface ◽  
High Surface Area ◽  
Graphitic Structure

Carbonization and chemical activation of an ionic liquid are demonstrated to produce an outstanding structural combination of an unexpectedly high surface area and a graphitic structure.

Microstructural Characterization of Activated Carbon Obtained from Waste Tires

2014 ◽  
Vol 87 ◽  
pp. 79-84
Author(s):  
Francesca Mazzanti ◽  
Giuseppe Magnani ◽  
Selene Grilli ◽  
Aldo Brillante ◽  
Tommaso Salzillo ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Activated Carbon ◽  
Crystallite Size ◽  
Microstructural Characterization ◽  
Xrd Analysis ◽  
Waste Tires ◽  
Graphitic Structure ◽  
Project Life ◽  
Characterization Of Activated Carbon

SOREME project (LIFE 11 ENV/IT/109) is aimed at synthesizing an innovative sorbent based on activated carbon obtained from the carbonization of waste tires. Microstructural characterization was mainly performed in order to define crystallinity, morphology and porosity of the activated carbon powders obtained in different conditions. In particular, XRD analysis always revealed a partially crystalline structure with different crystallite size of the nanographitic structure. The disorder of these structures was determined by Raman spectroscopy. This evaluation was made on the basis of the ratio of the integrated area of the D and G bands typical of the graphitic structure. Finally, SEM was used to put in evidence the mesopores and macropores.

Fabrication of Boron-Doped Activated Carbon for Zinc-Ion Hybrid Supercapacitors

2020 ◽  
Vol 30 (9) ◽  
pp. 458-464
Author(s):  
Young-Geun Lee ◽  
◽  
Haenam Jang ◽  
Geon-Hyoung An
Keyword(s):  
Activated Carbon ◽  
Zinc Ion ◽  
Hybrid Supercapacitors ◽  
Boron Doped
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