Remarkable electrochemical and ion-transport characteristics of magnesium-fluorinated alkoxyaluminate–diglyme electrolytes for magnesium batteries

Mandai, Toshihiko; Youn, Yong; Tateyama, Yoshitaka

doi:10.1039/d1ma00448d

Cited by 38 publications

(79 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…the improved ionic conductivity. [38] However, we believe this to be unlikely, as previous reports in lithium-ion electrolytes have shown that anion trapping results in a decrease of the overall ionic conductivity of the electrolyte. [39] Finally, the solvation of Ca(BF 4 ) 2 in organic carbonate solvents, both single and equimolar mixtures, was found to be highly solvent-dependent.…”

Section: Electrolytes With Borohydrides and Other Boron-containing An...mentioning

confidence: 79%

“…The formation of anion–solvent complexes and hence the decrease of anion mobility and increase in t + , suggested by MD simulations, is presented as the origin for the improved ionic conductivity. [ 38 ] However, we believe this to be unlikely, as previous reports in lithium‐ion electrolytes have shown that anion trapping results in a decrease of the overall ionic conductivity of the electrolyte. [ 39 ]…”

Section: Mg2+ and Ca2+ Cation Solvationmentioning

confidence: 93%

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

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: Electrolytes With Borohydrides and Other Boron-containing An...mentioning

confidence: 79%

Section: Mg2+ and Ca2+ Cation Solvationmentioning

confidence: 93%

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 electrolyte was synthesized according to a previously reported procedure. [19,27] A current density of 1 mA cm À 2 for 30 min for each dissolution and deposition at 30 °C was adopted for both the symmetric and asymmetric assemblies. Galvanostatic discharge-charge cycling was also performed on the [pMg or AZ31 alloy j 0.3 mol dm À 3 Mg[B-(HFIP) 4 ] 2 /G2 j MgMn 2 O 4 or α-MnO 2 ] cells.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

Ultrathin Magnesium Metal Anode – An Essential Component for High‐Energy‐Density Magnesium Battery Materialization

Mandai

Somekawa

2022

Batteries & Supercaps

Self Cite

View full text Add to dashboard Cite

The practical loading, i. e., thickness, of metal anodes predominates the practical energy density of batteries that incorporate elemental metals as anode active materials. Despite its significance for achieving high-energy-density rechargeable magnesium batteries (RMBs), the application of ultrathin magnesium foils remains a challenge because of the brittleness and unworkability of magnesium. This work provides a critical component of a geometric size applicable to laminate-type cells of dimensions 42 × 32 mm 2 or larger. Ultrathin magnesium foil without cracked edges can be fabricated by controlling the initial microstructure. Furthermore, the rolling temperature determines the resulting microstructure and thus the electrochemical properties. The optimal sample, a warm-rolled magnesium foil, exhibited excellent electrochemical characteristics owing to its favorable microstructure, which facilitated a homogeneous distribution of reaction sites. Battery performance using such ultrathin magnesium anodes was investigated with MgMn 2 O 4 and α-MnO 2 cathodes. Considering the weights of both the cathodes and anodes, the gravimetric energy density of primitive [α-MnO 2 j j pMg] cells was estimated to be 72 Wh kg electrode À 1 .

show abstract

“…These electrolytes exhibit excellent compatibility against an Mg metal anode. [16][17][18][19][20] Owing to the absence of strong corrosive components, their anodic stability is high enough to be compatible with transition metal oxides. 7,8 In this study, the discharge-charge performance of ZnMnO 3 at ambient temperature was investigated using one such representative electrolyte, i.e., Mg[B(HFIP) 4 ] 2 /G3.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

“…Important research on prototype MRBs was reported in 2000 where a certain Chevrel-phase compound (e.g., Mo 6 S 8 ), Mg metal, and the tetrahydrofuran solutions of Mg organohaloaluminate salt (e.g., Mg(AlCl 2 BuEt) 2 ) were used as a cathode, anode, and electrolyte, respectively. 2 Since this pioneering work, several efforts have been made to develop novel cathode, [3][4][5][6][7][8][9][10][11][12] anode, [13][14][15] and electrolyte materials [16][17][18][19][20] to realize practical MRBs. However, research into MRB materialization remains in a primitive stage because of several serious issues arising from the intrinsic chemical and electrochemical characteristics of Mg metal anodes and Mg 2+ (Mg ions).…”

Section: Introductionmentioning

confidence: 99%

Room Temperature Operation of Magnesium Rechargeable Batteries with a Hydrothermally Treated ZnMnO<sub>3</sub> Defect Spinel Cathode

et al. 2022

Self Cite

View full text Add to dashboard Cite

The current worldwide energy problems resulting from global environmental issues require highly efficient, environmentally benign energy storage technologies. Among various innovative battery types, rechargeable batteries based on magnesium (Mg) metal anodes represent an attractive option because of their large volumetric/gravimetric capacities and the cost-effectiveness of the base Mg metal. To realize practical Mg batteries, intense efforts have been focused on the development of cathode and electrolyte materials. Defect spinel oxides represent an emerging class of cathode active materials. The representative compound ZnMnO 3 has sufficient capacities for superlong cycles at elevated temperatures, owing to the suppression of the undesired spinel-rocksalt phase transition. To further enhance the electrochemical performance of ZnMnO 3 , hydrothermal treatment was applied to synthesize fine ZnMnO 3 nanoparticles. By controlling the pH of precursor solutions, treatment temperature, and reaction duration, fine ZnMnO 3 nanoparticles with a remarkably large surface area can be obtained. Our ZnMnO 3 , prepared using hydrothermal treatment, was able to deliver larger capacities compared with those obtained using the typical coprecipitation method. Furthermore, the hydrothermally treated ZnMnO 3 allowed stable battery cycling even at 30 °C; this was achieved by combining the highly efficient, electrochemically stable electrolyte and the ZnMnO 3 nanoparticles with the shortened diffusion path.

show abstract

Remarkable electrochemical and ion-transport characteristics of magnesium-fluorinated alkoxyaluminate–diglyme electrolytes for magnesium batteries

Abstract: Magnesium batteries (MBs) are fascinating options for large-scale energy-storage devices because the properties of magnesium metal anodes are more advantageous than those of their lithium or sodium counterparts. Moreover, the...

Cited by 38 publications

References 68 publications

Interfaces and Interphases in Ca and Mg Batteries

Interfaces and Interphases in Ca and Mg Batteries

Ultrathin Magnesium Metal Anode – An Essential Component for High‐Energy‐Density Magnesium Battery Materialization

Room Temperature Operation of Magnesium Rechargeable Batteries with a Hydrothermally Treated ZnMnO<sub>3</sub> Defect Spinel Cathode

Contact Info

Product

Resources

About