Changes in the interfacial charge-transfer resistance of Mg metal electrodes, measured by dynamic electrochemical impedance spectroscopy

Attias, Ran; Dlugatch, Ben; Chae, Munseok S.; Goffer, Yosef; Aurbach, Doron

doi:10.1016/j.elecom.2021.106952

Cited by 31 publications

(22 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Attias et al. [ 76 ] studied the interfacial resistance of a Mg electrode by staircase galvanostatic EIS and measured a high charge‐transfer resistance at OCV which quickly diminishes upon polarization (only toward negative potentials). A plating mechanism in which the identity of the adsorbed species changes during the polarization and subsequent plating was thus proposed.…”

Section: Plating and Stripping Mechanismmentioning

confidence: 99%

“…Charge transfer occurring before complete desolvation would also be in agreement with the measured decrease of the charge transfer resistance (by impedance spectroscopy) when a negative bias potential is applied to a Mg metal anode. [ 76 ] If any, the coulombic interaction between Cl – or solvent ligands with a Mg 0 adatom would be significantly lower than with Mg + or Mg 2+ and would explain why no such charge transfer resistance decrease was measured upon polarization toward positive potentials, because at higher potential the Mg complex remain unchanged.…”

Section: Plating and Stripping Mechanismmentioning

confidence: 99%

“…[ 66 ] Examples of such are Grignard reagents and chloroaluminate in THF or G1 electrolytes. [ 74–77 ]…”

Section: Electrolyte Stability and Passivation Layer Formationmentioning

confidence: 99%

See 2 more Smart Citations

Interfaces and Interphases in Ca and Mg Batteries

Forero-Saboya

Tchitchekova

Johansson

et al. 2021

Adv Materials Inter

View full text Add to dashboard Cite

The development of high energy density battery technologies based on divalent metals as the negative electrode is very appealing. Ca and Mg are especially interesting choices due to their combination of low standard reduction potential and natural abundance. One particular problem stalling the technological development of these batteries is the low efficiency of plating/stripping at the negative electrode, which relates to several factors that have not yet been looked at systematically; the nature/concentration of the electrolyte, which determines the mass transport of electro‐active species (cation complexes) toward the electrode; the possible presence of passivation layers, which may hinder ionic transport and hence limit electrodeposition; and the mechanisms behind the charge transfer leading to nucleation/growth of the metal. Different electrolytes are investigated for Mg and Ca, with the presence/absence of chlorides in the formulation playing a crucial role in the cation desolvation. From a R&D point‐of‐view, proper characterization alongside modeling is crucial to understand the phenomena determining the mechanisms of the plating/stripping processes. The state‐of‐the‐art is here presented together with a short perspective on the influence of the cation solvation also on the positive electrode and finally an attempt to define guidelines for future research in the field.

show abstract

Section: Plating and Stripping Mechanismmentioning

confidence: 99%

Section: Plating and Stripping Mechanismmentioning

confidence: 99%

See 1 more Smart Citation

Interfaces and Interphases in Ca and Mg Batteries

Forero-Saboya

Tchitchekova

Johansson

et al. 2021

Adv Materials Inter

View full text Add to dashboard Cite

show abstract

“…The EDL capacitance (C dl ) of the Bi 2 O 3 @CNTs electrode is significantly lower than that of the CNTs one, indicating the planar surface of the Bi 2 O 3 @CNTs electrode owing to the attachment of Bi 2 O 3 particles on the CNTs sidewalls at the defect points. Moreover, the Warburg element (W a ) of the electrode decreased in the presence of Bi 2 O 3 , proving that Bi 2 O 3 contributed toward decreasing the porosity of CNTs, thereby limiting the diffusion of the electrolyte onto the electrode [52]. The enhanced charge transfer in Bi 2 O 3 @CNTs electrodes is demonstrated by the lower electrical resistance (R e ) when compared to that of the CNTs because of the hybridization reactions between the Bi-6p 3 [53].…”

Section: Resultsmentioning

confidence: 98%

Preparation of Electrode Material Based to Bismuth Oxide-Attached Multiwalled Carbon Nanotubes for Lead (II) Ion Determination

Tran¹,

Le²,

Tran

2021

Journal of Nanomaterials

View full text Add to dashboard Cite

Bi2O3 was proven an attractive compound for electrode modification in heavy metal electrochemical analysis. A novel method for synthesizing Bi2O3-attached multiwalled carbon nanotubes (Bi2O3@CNTs) in solution is successfully developed in this study. Characteristics of the obtained Bi2O3@CNTs were proven by modern techniques such as X-ray diffraction, Raman spectroscopy, scanning electronic microscopy, transmission electron microscopy, cyclic voltammetry, electrochemical impedance spectroscopy, and anodic stripping voltammetry. Microscopy images and spectra results reveal that Bi2O3 particles are mainly attached at defect points on multiwalled carbon nanotubes (MWCNTs) walls. Paste electrodes based on the MWCNTs and synthesized Bi2O3@CNTs were applied for electrochemical measurements. The redox mechanism of Bi2O3 on the electrode surface was also made clear by the cyclic voltammetric tests. The recorded cyclic voltammograms and electrochemical impedance spectroscopy demonstrate that the Bi2O3@CNTs electrode was in lower charge transfer resistance than the CNTs one and in the controlled diffusion region. Investigation on the electrochemical behavior of Pb2+ at the Bi2O3@CNTs electrodes found a significant improvement of analytical response, resulting in 3.44 μg/L of the detection limit and 2.842 μA/(μg/L) of the sensitivity with linear sweep anodic stripping voltammetry technique at optimized conditions.

show abstract

“…Mg anodes can behave reversibly only in passivation‐free conditions. Any side reactions of Mg anodes in electrolyte solutions that form surface films are supposed to block the Mg metal anodes because there is no solid electrolyte interface (SEI) options for surface films comprising ionic Mg compounds [12,13] . Thereby, only ether solvents can be relevant because these solvents are polar enough to dissolve several suitable electrolytes, but they are not reacting with Mg metal.…”

Section: Introductionmentioning

confidence: 99%

Critical Review on the Unique Interactions and Electroanalytical Challenges Related to Cathodes ‐ Solutions Interfaces in Non‐Aqueous Mg Battery Prototypes

et al. 2021

Self Cite

View full text Add to dashboard Cite

Rechargeable batteries based on Mg metal anodes may be a promising alternative to current Li‐ion battery systems. However, the development of practical rechargeable Mg batteries (RMBs) is hindered by the absence of cathode materials that can reversibly intercalate Mg ions with a reasonably fast kinetic, while still exhibiting high capacity and high working voltages. In this minireview we summarize our recent progress in understanding cathodes/electrolyte solutions interfaces in non‐aqueous Mg systems. While most studies in the field of cathode materials for RMBs focus on the solid‐state diffusion phenomena of the bare Mg ion within the solid hosts, this minireview summarizes several important findings that demonstrate how the electrochemical response of the cathode material is also significantly influenced by the solution chemistry and structure. We provide a comprehensive description of the sequential steps taking place in the electrochemical intercalation reactions, with an emphasis on the charge transfer process across the solution/electrode interfaces. We discuss the different manner in which the electrolyte solutions′ chemical characteristics can impact each step of the intercalation process and why this information is important for the development of new cathode materials for rechargeable Mg batteries. We believe that these types of fundamental investigations are crucial steps for the realization of this interesting battery technology.

show abstract

Changes in the interfacial charge-transfer resistance of Mg metal electrodes, measured by dynamic electrochemical impedance spectroscopy

Cited by 31 publications

References 11 publications

Interfaces and Interphases in Ca and Mg Batteries

Interfaces and Interphases in Ca and Mg Batteries

Preparation of Electrode Material Based to Bismuth Oxide-Attached Multiwalled Carbon Nanotubes for Lead (II) Ion Determination

Critical Review on the Unique Interactions and Electroanalytical Challenges Related to Cathodes ‐ Solutions Interfaces in Non‐Aqueous Mg Battery Prototypes

Contact Info

Product

Resources

About