electrochemical double layer
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2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Quoc Bao Le ◽  
Thanh-Huong Nguyen ◽  
Haojie Fei ◽  
Constantin Bubulinca ◽  
Lukas Munster ◽  
...  

AbstractBenzendicarboxylic acid (BDC)-based metal–organic frameworks (MOFs) have been widely utilized in various applications, including supercapacitor electrode materials. Manganese and copper have solid diamond frames formed with BDC linkers among transition metals chosen for MOF formation. They have shown the possibility to enlarge capacitance at different combinations of MOFs and polyaniline (PANI). Herein, reduced graphene oxide (rGO) was used as the matrix to fabricate electrochemical double-layer SCs. PANI and Mn/Cu-MOF's effect on the properties of electrode materials was investigated through electrochemical analysis. As a result, the highest specific capacitance of about 276 F/g at a current density of 0.5 A/g was obtained for rGO/Cu-MOF@PANI composite.


Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2899
Author(s):  
Joseph Paul Baboo ◽  
Shumaila Babar ◽  
Dhaval Kale ◽  
Constantina Lekakou ◽  
Giuliano M. Laudone

Graphene electrodes are investigated for electrochemical double layer capacitors (EDLCs) with lithium ion electrolyte, the focus being the effect of the pore size distribution (PSD) of electrode with respect to the solvated and desolvated electrolyte ions. Two graphene electrode coatings are examined: a low specific surface area (SSA) xGNP-750 coating and a high SSA coating based on a-MWGO (activated microwave expanded graphene oxide). The study comprises an experimental and a computer modeling part. The experimental part includes fabrication, material characterization and electrochemical testing of an EDLC with xGNP-750 coating electrodes and electrolyte 1M LiPF6 in EC:DMC. The computational part includes simulations of the galvanostatic charge-discharge of each EDLC type, based on a continuum ion transport model taking into account the PSD of electrodes, as well as molecular modeling to determine the parameters of the solvated and desolvated electrolyte ions and their adsorption energies with each type of electrode pore surface material. Predictions, in agreement with the experimental data, yield a specific electrode capacitance of 110 F g−1 for xGNP-750 coating electrodes in electrolyte 1M LiPF6 in EC:DMC, which is three times higher than that of the high SSA a-MWGO coating electrodes in the same lithium ion electrolyte.


2021 ◽  
Vol MA2021-02 (5) ◽  
pp. 1917-1917
Author(s):  
Zahra Abedi ◽  
Desirée Leistenschneider ◽  
Weixing Chen ◽  
Douglas G Ivey

2021 ◽  
pp. 53-77
Author(s):  
Aleksandr E. Kolosov ◽  
Volodymyr Y. Izotov ◽  
Elena P. Kolosova ◽  
Volodymyr V. Vanin ◽  
Anish Khan

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