Contribution of different charge storage mechanisms in cobalt pyrophosphate–based supercapattery

Ionics ◽  
2021 ◽  
Author(s):  
Priyadharshini Matheswaran ◽  
Pandi Karuppiah ◽  
Pazhanivel Thangavelu
2019 ◽  
Vol 11 (3) ◽  
pp. 396-402 ◽  
Author(s):  
Bo Wang ◽  
Yang Yu ◽  
Xuejiao Zhang ◽  
Qingjie Wang ◽  
Yufeng Zhao

1964 ◽  
Vol 27 (4) ◽  
pp. 293 ◽  
Author(s):  
W.D. Ryan ◽  
H.B. Williams
Keyword(s):  

2003 ◽  
Vol 775 ◽  
Author(s):  
Ivan Stanish ◽  
Daniel A. Lowy ◽  
Alok Singh

AbstractImmobilized polymerized electroactive vesicles (IPEVs) are submicron biocapsules capable of storing charge in confined environments and chemisorbing on surfaces. Methods to immobilize stable submicron sized electroactive vesicles and the means to measure electroactivity of IPEVs at nanolevels have been demonstrated. IPEVs can withstand steep potential gradients applied across their membrane, maintain their structural integrity against surfaces poised at high/low electrical potentials, retain electroactive material over several days, and reversibly mediate (within the membrane) electron flow between the electrode surface and vesicle interior. IPEVs have strong potential to be used for charge storage and electron coupling applications that operate on the submicron scale and smaller.


2021 ◽  
Vol 411 ◽  
pp. 128416
Author(s):  
S.T. Senthilkumar ◽  
Jeong-Sun Park ◽  
Rebeca Marcilla ◽  
Jesus Palma ◽  
Youngsik Kim

Author(s):  
Sarika Jadhav ◽  
Ramchandra S. Kalubarme ◽  
Norihiro Suzuki ◽  
Chiaki Terashima ◽  
Bharat Kale ◽  
...  

2021 ◽  
Vol 125 (8) ◽  
pp. 4449-4457
Author(s):  
Jibin J. Samuel ◽  
Varun Kumar Karrothu ◽  
Ram Kumar Canjeevaram Balasubramanyam ◽  
Aiswarya Abhisek Mohapatra ◽  
Chandrasekhar Gangadharappa ◽  
...  

2021 ◽  
Author(s):  
Hemalatha Kuzhandaivel ◽  
Sornalatha Manickam ◽  
Suresh Kannan Balasingam ◽  
Manik Clinton Franklin ◽  
Hee-Je Kim ◽  
...  

Sulfur and nitrogen-doped graphene quantum dots/polyaniline nanocomposites were synthesized and their electrochemical charge storage properties were tested for supercapacitor applications.


2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Yibing Xie

AbstractA PPY/TiO2/PPY jacket nanotube array was fabricated by coating PPY layer on the external and internal surface of a tube wall-separated TiO2 nanotube array. It shows coaxial triple-walled nanotube structure with two PPY nanotube layers sandwiching one TiO2 nanotube layer. PPY/TiO2/PPY reveals much higher current response than TiO2. The theoretical calculation indicates PPY/TiO2/PPY reveals higher density of states and lower band gap, accordingly presenting higher conductivity and electroactivity, which is consistent with the experimental result of a higher current response. The electroactivity is highly enhanced in H2SO4 rather than Na2SO4 electrolyte due to feasible pronation process of PPY in an acidic solution. PPY/TiO2/PPY could conduct the redox reaction in H2SO4 electrolyte which involves the reversible protonation/deprotonation and HSO4− doping/dedoping process and accordingly contributes to Faradaic pseudocapacitance. The specific capacitance is highly enhanced from 1.7 mF cm−2 of TiO2 to 123.4 mF cm−2 of PPY/TiO2/PPY at 0.1 mA cm−2 in H2SO4 electrolyte. The capacitance also declines from 123.4 to 31.7 mF cm−2 when the current density increases from 0.1 to 1 mA cm−2, presenting the rate capacitance retention of 26.7% due to the semiconductivity of TiO2. A PPY/TiO2/PPY jacket nanotube with high charge storage capacitance is regarded as a promising supercapacitor electrode material.


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