scholarly journals Accessing the Two‐Electron Charge Storage Capacity of MnO 2 in Mild Aqueous Electrolytes

2020 ◽  
Vol 10 (23) ◽  
pp. 2000332 ◽  
Author(s):  
Mickaël Mateos ◽  
Nikolina Makivic ◽  
Yee‐Seul Kim ◽  
Benoît Limoges ◽  
Véronique Balland
Keyword(s):  
Storage Capacity ◽  
Charge Storage ◽  
Aqueous Electrolytes ◽  
Electron Charge

scholarly journals On the unsuspected role of multivalent metal ions on the charge storage of a metal oxide electrode in mild aqueous electrolytes

2019 ◽  
Vol 10 (38) ◽  
pp. 8752-8763 ◽  
Author(s):  
Yee-Seul Kim ◽  
Kenneth D. Harris ◽  
Benoît Limoges ◽  
Véronique Balland
Keyword(s):  
Metal Oxide ◽  
Metal Ions ◽  
Metal Ion ◽  
Charge Storage ◽  
Aqueous Electrolytes ◽  
Electron Charge ◽  
Oxide Electrode ◽  
Metal Ion Complexes ◽  
Multivalent Metal

The hidden role of hexaaquo metal ion complexes in the proton-coupled electron charge storage at a metal oxide electrode.

scholarly journals Using redox electrolytes to extend the charge storage capacity in an aqueous hybrid ion battery

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

Relaxation Behavior and Breakdown Mechanisms of Nanocrystals Embedded Zr-doped HfO2 High-k Thin Films for Nonvolatile Memories

2008 ◽  
Vol 1071 ◽  
Author(s):  
Chia-Han Yang ◽  
Yue Kuo ◽  
Chen-Han Lin ◽  
Rui Wan ◽  
Way Kuo
Keyword(s):  
Nonvolatile Memory ◽  
Storage Capacity ◽  
Breakdown Strength ◽  
Charge Storage ◽  
Leakage Currents ◽  
Low Leakage ◽  
Nonvolatile Memories ◽  
High K ◽  
Memory Characteristics ◽  
Large Charge

AbstractSemiconducting or metallic nanocrystals embedded high-k films have been investigated. They showed promising nonvolatile memory characteristics, such as low leakage currents, large charge storage capacities, and long retention times. Reliability of four different kinds of nanocrystals, i.e., nc- Ru, -ITO, -Si and -ZnO, embedded Zr-doped HfO2 high-k dielectrics have been studied. All of them have higher relaxation currents than the non-embedded high-k film has. The decay rate of the relaxation current is in the order of nc-ZnO > nc-ITO > nc-Si > nc-Ru. When the relaxation currents of the nanocrystals embedded samples were fitted to the Curie-von Schweidler law, the n values were between 0.54 and 0.77, which are much lower than that of the non embedded high-k sample. The nanocrystals retain charges in two different states, i.e., deeply and loosely trapped. The ratio of these two types of charges was estimated. The charge storage capacity and holding strength are strongly influenced by the type of material of the embedded nanocrystals. The nc-ZnO embedded film holds trapped charges longer than other embedded films do. The ramp-relax result indicates that the breakdown of the embedded film came from the breakdown of the bulk high-k film. The type of nanocrystal material influences the breakdown strength.

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 Structural Control of Charge Storage Capacity to Achieve 100% Doping in Vapor Phase-Polymerized PEDOT/Tosylate

ACS Omega ◽  
2019 ◽  
Vol 4 (26) ◽  
pp. 21818-21826 ◽  
Author(s):  
Junaiz Rehmen ◽  
Kamil Zuber ◽  
Mohsen Modarresi ◽  
Donghyun Kim ◽  
Eric Charrault ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Structural Control ◽  
Storage Capacity ◽  
Charge Storage

The Charge Storage Mechanism of MnCO 3 in Aqueous Electrolytes

2020 ◽  
Vol 5 (17) ◽  
pp. 5316-5322
Author(s):  
Vishnu Vardhan Palem ◽  
Mustapha Balarabe Idris ◽  
Thiruvenkatam Subramaniam ◽  
Devaraj Sappani
Keyword(s):  
Charge Storage ◽  
Aqueous Electrolytes ◽  
Storage Mechanism ◽  
Charge Storage Mechanism

A novel calendula-like MnNb2O6 anchored on graphene sheet as high-performance intercalation pseudocapacitive anode for lithium-ion capacitors

2019 ◽  
Vol 7 (6) ◽  
pp. 2855-2863 ◽  
Author(s):  
Xu Zhang ◽  
Jinyu Zhang ◽  
Shuying Kong ◽  
Kai Zhu ◽  
Jun Yan ◽  
...  
Keyword(s):  
Graphene Sheet ◽  
Anode Material ◽  
High Performance ◽  
Storage Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Charge Storage ◽  
First Time ◽  
Superior Cycling Stability

In this paper, for the first time, we investigated MnNb2O6 as a new rate capability type anode material for lithium-ion capacitors (LICs), which exhibit excellent charge storage capacity and reasonably superior cycling stability.

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