Effect of intercalated alkali ions in layered manganese oxide nanosheets as neutral electrochemical capacitors

2019 ◽  
Vol 55 (9) ◽  
pp. 1213-1216 ◽  
Author(s):  
Nattapol Ma ◽  
Soracha Kosasang ◽  
Atiweena Krittayavathananon ◽  
Nutthaphon Phattharasupakun ◽  
Sathyamoorthi Sethuraman ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
Manganese Oxides ◽  
Electrochemical Capacitors ◽  
Electrochemical Capacitor ◽  
Charge Storage ◽  
Storage Mechanism ◽  
Alkali Ions ◽  
Charge Storage Mechanism ◽  
Layered Manganese Oxide ◽  
Insight Into

New insight into the influence of Li+, Na+, and K+ cations between adjacent layers of birnessite-type manganese oxides (MnOx) towards the intercalation/deintercalation charge storage mechanism as a neutral electrochemical capacitor (1 M Na2SO4) is demonstrated.

Charge storage mechanism of activated manganese oxide composites for pseudocapacitors

2015 ◽  
Vol 3 (24) ◽  
pp. 12786-12795 ◽  
Author(s):  
Tzu-Ho Wu ◽  
David Hesp ◽  
Vin Dhanak ◽  
Christopher Collins ◽  
Filipe Braga ◽  
...  
Keyword(s):  
Structural Change ◽  
Manganese Oxide ◽  
Manganese Oxides ◽  
Electrochemical Activation ◽  
Charge Storage ◽  
Storage Mechanism ◽  
Charge Storage Mechanism ◽  
Oxide Composites

Manganese oxides can undergo an electrochemical activation step that leads to greater capacitances, of which the structural change and mechanism remains poorly understood.

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>

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>

Insight into the unusual intercalation/deintercalation phenomena of alkali cations in the layered manganese oxide for electrochemical capacitors

2020 ◽  
Vol 455 ◽  
pp. 227969 ◽  
Author(s):  
Nattapol Ma ◽  
Soracha Kosasang ◽  
Praeploy Chomkhuntod ◽  
Salatan Duangdangchote ◽  
Nutthaphon Phattharasupakun ◽  
...  
Keyword(s):  
Manganese Oxide ◽  
Electrochemical Capacitors ◽  
Alkali Cations ◽  
Layered Manganese Oxide ◽  
Insight Into

Insight into the charge storage mechanism and capacity retention fading of MnCo2O4 used as supercapacitor electrodes

2017 ◽  
Vol 258 ◽  
pp. 1008-1015 ◽  
Author(s):  
Atiweena Krittayavathananon ◽  
Tanut Pettong ◽  
Pinit Kidkhunthod ◽  
Montree Sawangphruk
Keyword(s):  
Charge Storage ◽  
Capacity Retention ◽  
Storage Mechanism ◽  
Charge Storage Mechanism ◽  
Insight Into
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