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.

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.

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>

Effect of Structural Ordering on the Charge Storage Mechanism of p-Type Organic Electrode Materials

2021 ◽  
Vol 13 (6) ◽  
pp. 7135-7141 ◽  
Author(s):  
Brian M. Peterson ◽  
Cara N. Gannett ◽  
Luis Melecio-Zambrano ◽  
Brett P. Fors ◽  
Héctor Abruña
Keyword(s):  
Electrode Materials ◽  
Charge Storage ◽  
Structural Ordering ◽  
Storage Mechanism ◽  
Organic Electrode ◽  
Charge Storage Mechanism ◽  
P Type

Unraveling the different charge storage mechanism in T and H phases of MoS2

2016 ◽  
Vol 217 ◽  
pp. 1-8 ◽  
Author(s):  
Bao Zhang ◽  
Xiao Ji ◽  
Kui Xu ◽  
Chi Chen ◽  
Xiong Xiong ◽  
...  
Keyword(s):  
Charge Storage ◽  
Storage Mechanism ◽  
Charge Storage Mechanism

Understanding and Calibration of Charge Storage Mechanism in Cyclic Voltammetry Curves

2021 ◽  
Author(s):  
Xiangjun Pu ◽  
Dong Zhao ◽  
Chenglong Fu ◽  
Zhongxue Chen ◽  
Shunan Cao ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Charge Storage ◽  
Storage Mechanism ◽  
Charge Storage Mechanism

scholarly journals Na2.4Al0.4Mn2.6O7 anionic redox cathode material for sodium ion batteries- a combined experimental and theoretical approach to elucidate its charge storage mechanism

2022 ◽  
Author(s):  
Cindy Soares ◽  
Begoña Silvan ◽  
Yong-Seok Choi ◽  
Veronica Celorrio ◽  
Giannantonio Cibin ◽  
...  
Keyword(s):  
Cathode Material ◽  
Theoretical Approach ◽  
High Performance ◽  
Sodium Ion ◽  
Charge Storage ◽  
Sodium Ion Batteries ◽  
Storage Mechanism ◽  
Charge Storage Mechanism

Here we report the synthesis via ceramic methods of the high-performance Mn-rich Na2.4Al0.4Mn2.6O7 oxygen-redox cathode material for Na-ion batteries which we use as a testbed material to study the effects...

Fiber-based all-solid-state asymmetric supercapacitors based on Co3O4@MnO2 core/shell nanowire arrays

2017 ◽  
Vol 5 (44) ◽  
pp. 22939-22944 ◽  
Author(s):  
Xiaoying Niu ◽  
Guoyin Zhu ◽  
Zhihui Yin ◽  
Ziyang Dai ◽  
Xiaocheng Hou ◽  
...  
Keyword(s):  
Solid State ◽  
Nanowire Array ◽  
Fabrication Process ◽  
Nanowire Arrays ◽  
Charge Storage ◽  
Core Shell ◽  
Asymmetric Supercapacitors ◽  
Storage Mechanism ◽  
Array Electrode ◽  
Charge Storage Mechanism

Schematic illustration of the fabrication process and charge storage mechanism of the hierarchical Ni wire/Co3O4@MnO2 nanowire array electrode.

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