Understanding the charge storage mechanism of supercapacitors: in situ/operando spectroscopic approaches and theoretical investigations

2021 ◽  
Author(s):  
Abhinandan Patra ◽  
Namsheer K ◽  
Jeena Rose Jos ◽  
Surjit Sahoo ◽  
Brahmananda Chakraborty ◽  
...  
Keyword(s):  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Charge Storage ◽  
Storage Mechanism ◽  
Theoretical Investigations ◽  
Charge Storage Mechanism

Deciphering of the charge storage mechanism of conventional supercapacitors (SCs) can be a humongous stride towards developing high energy density and prolonged cyclability based SCs which can cease the energy...

scholarly journals Charge storage mechanism in nanoporous carbons and its consequence for electrical double layer capacitors

2010 ◽  
Vol 368 (1923) ◽  
pp. 3457-3467 ◽  
Author(s):  
Patrice Simon ◽  
Yury Gogotsi
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Energy Storage Devices ◽  
Nanoporous Carbons ◽  
Storage Devices ◽  
Storage Mechanism ◽  
Charge Storage Mechanism ◽  
Double Layer Capacitors

Electrochemical capacitors, also known as supercapacitors, are energy storage devices that fill the gap between batteries and dielectric capacitors. Thanks to their unique features, they have a key role to play in energy storage and harvesting, acting as a complement to or even a replacement of batteries which has already been achieved in various applications. One of the challenges in the supercapacitor area is to increase their energy density. Some recent discoveries regarding ion adsorption in microporous carbon exhibiting pores in the nanometre range can help in designing the next generation of high-energy-density supercapacitors.

Revealing the multiple cathodic and anodic involved charge storage mechanism in a FeSe2 cathode for aluminium-ion batteries by in situ magnetometry

2021 ◽  
Author(s):  
Huaizhi Wang ◽  
Linyi Zhao ◽  
Hao Zhang ◽  
Yongshuai Liu ◽  
Li Yang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Low Cost ◽  
Lithium Ion ◽  
High Energy ◽  
Charge Storage ◽  
Storage Mechanism ◽  
Aluminium Ion ◽  
Charge Storage Mechanism ◽  
In Situ Magnetometry

Rechargeable aluminium-ion batteries (AIBs) are considered to be promising alternatives for current lithium-ion batteries (LIBs), since they can offer the possibilities of low cost with high energy-to-price ratios. Unlike in...

Revealing the charge/discharge mechanism of Na–O2 cells by in situ soft X-ray absorption spectroscopy

2018 ◽  
Vol 11 (8) ◽  
pp. 2073-2077 ◽  
Author(s):  
Mohammad N. Banis ◽  
Hossein Yadegari ◽  
Qian Sun ◽  
Tom Regier ◽  
Teak Boyko ◽  
...  
Keyword(s):  
Energy Density ◽  
Absorption Spectroscopy ◽  
High Energy ◽  
High Energy Density ◽  
X Ray ◽  
Discharge Mechanism ◽  
X Ray Absorption ◽  
Charge Discharge

Developing high energy density batteries, such as metal–air systems, requires a good understanding of their underlying electrochemical principles.

scholarly journals The Role of Al3+-Based Aqueous Electrolytes in the Charge Storage Mechanism of MnOx Cathodes

2020 ◽  
Author(s):  
Véronique Balland ◽  
Mickaël Mateos ◽  
Kenneth D. Harris ◽  
Benoit Limoges
Keyword(s):  
Manganese Oxide ◽  
Critical Analysis ◽  
Charge Storage ◽  
Aqueous Electrolytes ◽  
Storage Mechanism ◽  
Main Charge ◽  
Charge Storage Mechanism ◽  
The Subject

<p>Rechargeable aqueous aluminium batteries are the subject of growing interest, but the charge storage mechanisms at manganese oxide-based cathodes remain poorly understood with as many mechanisms as studies. Here, we use an original <i>in situ</i> spectroelectrochemical methodology to unambiguously demonstrate that the reversible proton-coupled MnO<sub>2</sub>-to-Mn<sup>2+</sup> conversion is the main charge storage mechanism occurring at MnO<sub>2</sub> cathodes over a range of slightly acidic Al<sup>3+</sup>-based aqueous electrolytes. In Zn/MnO<sub>2</sub> assemblies, this mechanism is associated with high gravimetric capacity and discharge potentials, up to 560 mAh·g<sup>-1</sup> and 1.76 V respectively, attractive efficiencies (<i>CE</i> > 98.5 % and <i>EE</i> > 80%) and excellent cyclability (> 750 cycles at 10 A·g<sup>-1</sup>). Finally, we conducted a critical analysis of the data previously published on MnO<sub>x</sub> cathodes in Al<sup>3+</sup>-based aqueous electrolytes to conclude on a universal charge storage mechanism, <i>i.e.</i>, the reversible electrodissolution/electrodeposition of MnO<sub>2</sub>.<i></i></p>

In Situ Co–O Bond Reinforcement of the Artificial Cathode Electrolyte Interphase in Highly Delithiated LiCoO2 for High-Energy-Density Applications

2021 ◽  
Author(s):  
Fu-Ming Wang ◽  
Endazenaw Bizuneh Chemere ◽  
Wen-Chen Chien ◽  
Chi-Liang Chen ◽  
Chun-Chuan Hsu ◽  
...  
Keyword(s):  
Energy Density ◽  
High Energy ◽  
High Energy Density

Rapid in situ growth of β-Ni(OH)2 nanosheet arrays on nickel foam as an integrated electrode for supercapacitors exhibiting high energy density

2020 ◽  
Vol 49 (15) ◽  
pp. 4956-4966 ◽  
Author(s):  
Jingbo Li ◽  
Yu Liu ◽  
Wei Cao ◽  
Nan Chen
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Nickel Foam ◽  
High Energy ◽  
High Energy Density ◽  
In Situ Growth ◽  
Nanosheet Arrays

A rapid in situ method was employed to synthesize the β-Ni(OH)2@NF integrated electrode for a high performance ASC device.

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