Capacitive Behavior and Charge Storage Mechanism of Manganese Dioxide in Aqueous Solution Containing Bivalent Cations

2009 ◽  
Vol 156 (1) ◽  
pp. A73 ◽  
Author(s):  
Chengjun Xu ◽  
Hongda Du ◽  
Baohua Li ◽  
Feiyu Kang ◽  
Yuqun Zeng
Keyword(s):  
Aqueous Solution ◽  
Manganese Dioxide ◽  
Charge Storage ◽  
Storage Mechanism ◽  
Capacitive Behavior ◽  
Bivalent Cations ◽  
Charge Storage Mechanism

Amorphous Manganese Dioxide as a Material for an Electrochemical Pseudocapacitor

2005 ◽  
Vol 277-279 ◽  
pp. 703-707 ◽  
Author(s):  
Sun Wen ◽  
In Hyeong Yeo ◽  
Jong Man Park ◽  
Sun Il Mho
Keyword(s):  
Ion Exchange ◽  
Manganese Dioxide ◽  
Redox Reaction ◽  
Proton Exchange ◽  
Charge Storage ◽  
Storage Process ◽  
Oxide Electrode ◽  
Storage Mechanism ◽  
Charge Storage Mechanism ◽  
Hydrated Manganese Dioxide

The charge storage process of amorphous hydrated manganese dioxide (MnO2) as a pseudo-capacitor involves a fast redox reaction at the electrode surface. In order to understand the charge storage mechanism of MnO2 as a pseudo-capacitor in an aqueous KCl solution, we monitored the change of the capacitance by varying the pH of the solution, the cation of the electrolyte, the concentration of the KCl electrolyte, and the solvent. The charge storage mechanism of a metal oxide electrode such as MnO2 is concluded to involve a fast redox reaction through both the potassium ion exchange, MnO2 + δK+ + δe- ⇔ MnO2-δ(OK)δ and the proton exchange, MnO2 + δH+ + δe- ⇔ MnO2-δ(OH)δ dependent upon the availability of the cations in the electrolyte.

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 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 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...

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