A new class of electrolytes based on magnesium bis(diisopropyl)amide for magnesium–sulfur batteries

Zhao, Xinghe; Yang, Yong; NuLi, Yanna; Li, Dongyu; Wang, Yurui; Xiang, Xuelin

doi:10.1039/c9cc02556a

Cited by 37 publications

(43 citation statements)

References 18 publications

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“…In Mg–S batteries, the choice of the current collector has also a great impact on the electrochemical behavior particularly in the case of halogen‐containing corrosive electrolytes, the nature of the electroactive cathode materials and the dissolution of polysulfides during cycling . The currently reported commercial metal‐based current collectors include aluminum foil, stainless‐steel (SS) foil, carbon‐coated aluminum foil, copper, and the anticorrosion alloy Inconel 625 . While Cu is generally considered unstable against chloride‐containing electrolytes, Zeng et al recently reported that a sulfur cathode is compatible with the traditional APC electrolyte using copper as current collector below 1.7 V versus Mg/Mg 2+ .…”

Section: Cathode Materialsmentioning

confidence: 99%

“…Also, the TGA results of the cathode with a stainless‐steel current collector suggest a reaction of sulfur with the nucleophilic electrolyte as evidenced of the large weight loss of sulfur in the cathode after cycling. Due to the unique advantages of the Cu current collector, it was also applied in combination with other halogenated electrolytes including the organic magnesium boron‐based (OMBB) electrolyte, the boron‐centered base magnesium (BCM) electrolyte, the magnesium bis(diisopropylamide) (MBA) electrolyte and a trifluoromethanesulfonate‐based electrolyte …”

Section: Cathode Materialsmentioning

confidence: 99%

“…A common approach to the synthesis of Mg salts for the electrolyte is the combination a Mg complex containing a nonnucleophilic base, such as [HMDS] 2 Mg, HMDSMgCl, bis(diisopropyl)amide, with a boron‐ or aluminum‐ containing Lewis acid . Liebenow et al reported that the Hauser base–derived magnesium hexamethyldisilazide chloride (HMDSMgCl) electrolyte supported magnesium stripping and plating in rechargeable Mg batteries.…”

Section: Electrolyte Systemsmentioning

confidence: 99%

“…In 2019, Nuli et al reported on a novel electrolyte for rechargeable Mg–S batteries consisting of MBA and AlCl 3 dissolved in THF. The authors pointed out that the electron‐rich amide in MBA limits the anodic stability of the salt, since electrons can be easily withdrawn from it at high voltages.…”

Section: Electrolyte Systemsmentioning

confidence: 99%

“…The authors pointed out that the electron‐rich amide in MBA limits the anodic stability of the salt, since electrons can be easily withdrawn from it at high voltages. By contrast, introduction of the Lewis acid AlCl 3 stabilizes the MgN bond in MBA even at high potentials since the high electron affinity of AlCl 3 could suppress the withdrawal of electrons from the MgN bond . Consequently, the molar ratio of MBA and AlCl 3 was adjusted from 2:1 to 1:2.…”

Section: Electrolyte Systemsmentioning

confidence: 99%

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Rechargeable Magnesium–Sulfur Battery Technology: State of the Art and Key Challenges

Wang

Buchmeiser

2019

Adv Funct Materials

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abundant metal on earth. [19] In view of these merits and the high abundance of sulfur, increasing interest has been raised on post Li-S battery systems, including magnesium-selenium batteries, Mg-S batteries, which display higher energy density, low costs and improved safety in comparison to Li-S batteries. [11,[20][21][22][23] Despite the advantages of Mg-S batteries, major issues in this field are related to the severe overcharge behavior and low sulfur utilization of the cathode during charging and discharging in general, the formation of magnesium polysulfides and the slow diffusion of Mg 2+ , which all result in poor electrochemical behavior. [17,22,24,25] Substantial efforts have been made to improve cell performance so far, including the modification of cathode materials, anodes and separators, [25] the synthesis of novel electrolyte systems, [24,26] which all to some extent can improve the cell behavior. Figure 1d gives a timeline of all the novel findings in the area of Mg-S batteries in each year. Figure 1b demonstrates an overview of the topics addressed in the published research articles in Mg-S batteries. According to this survey, the research community developed a strong preference for investigating novel electrolyte systems, modifying sulfur cathode materials and carrying out mechanistic studies. By contrast, only few research groups devoted their work to the other components of a Mg-S battery, such as the anode and the separator. Major improvements related to the latter two will also be thoroughly discussed in the following sections.Several reviews already discussed the developments in Mg batteries based on intercalation cathode materials. [1,15,[27][28][29][30] By contrast, accounts on Mg batteries containing a sulfur-based conversion cathode, which benefits from high theoretical energy density, a reasonable potential difference with Mg, nontoxicity and high earth abundance [11,31,32] are rare. This review solely refers to Mg-S batteries that use sulfur-based conversion cathodes.The purposes of this review are to summarize and highlight the most up-to-date and novel findings for Mg-S batteries, addressing sulfur-based conversion cathodes and Mg anode materials, separator modifications as well as various electrolyte systems. Furthermore, since the research on Mg-S batteries is still at an initial stage, some challenges, including the capacity decay mechanism, a lack of suitable electrolyte systems and the passivation of the Mg anode, which so far impedes any superior electrochemical performance in Mg-S batteries, will also be addressed. In addition, we also listed and discussed some possible future prospects for high energy Mg-S batteries. Finally, the currently reported Mg-S systems have been summarized in a table for easy comparison.This review on rechargeable Mg-S batteries is arranged in the following sequences. In the first section, currently applied anode materials (various forms of Mg anodes) and prospective anodes are discussed. Next, various sulfur-based conversion cathodes, which mainly...

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Section: Cathode Materialsmentioning

confidence: 99%

Section: Cathode Materialsmentioning

confidence: 99%

Section: Electrolyte Systemsmentioning

confidence: 99%

Section: Electrolyte Systemsmentioning

confidence: 99%

Section: Electrolyte Systemsmentioning

confidence: 99%

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Rechargeable Magnesium–Sulfur Battery Technology: State of the Art and Key Challenges

Wang

Buchmeiser

2019

Adv Funct Materials

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A Progress Report on Metal–Sulfur Batteries

Manthiram

2020

Adv Funct Materials

106

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Nonaqueous conversion-reaction sulfur chemistry has been attracting increasing attention over the past decade for the development of nextgeneration lithium-based batteries. Li-S batteries are currently approaching a nexus stage from lab-scale experiments to possible pragmatic applications. Inspired by the success of Li-S chemistry, other metal-sulfur batteries with a variety of metallic anodes, such as sodium, potassium, magnesium, calcium, and aluminum, have also started to attract attention. In comparison to lithium, Na, Mg, Al, K, and Ca are naturally more abundant and affordable.

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Polysulfides in Magnesium‐Sulfur Batteries

Luo,

Wang,

Elander

et al. 2023

Advanced Materials

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Mg‐S batteries hold great promise as a potential alternative to Li‐based technologies. Their further development hinges on solving a few key challenges, including the lower capacity and poorer cycling performance when compared to Li counterparts. At the heart of the issues is the lack of knowledge on polysulfide chemical behaviors in the Mg‐S battery environment. In this Review, we provide a comprehensive overview of the current understanding of polysulfide behaviors in Mg‐S batteries. First, we provide a systematic summary of experimental and computational techniques for polysulfide characterization. Next, conversion pathways for Mg polysulfide species within the battery environment are discussed, highlighting the important role of polysulfide solubility in determining reaction kinetics and overall battery performance. The focus then shifts to negative effects of polysulfide shuttling on Mg‐S batteries. We outline various strategies for achieving an optimal balance between polysulfide solubility and shuttling, including use of electrolyte additives, polysulfide‐trapping materials, and dual‐functional catalysts. Based on the current understanding, we identify directions for further advancing knowledge of Mg polysulfide chemistry, emphasizing the integration of experiment with computation as a powerful approach to accelerate the development of Mg‐S battery technology.This article is protected by copyright. All rights reserved

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A new class of electrolytes based on magnesium bis(diisopropyl)amide for magnesium–sulfur batteries

Cited by 37 publications

References 18 publications

Rechargeable Magnesium–Sulfur Battery Technology: State of the Art and Key Challenges

Rechargeable Magnesium–Sulfur Battery Technology: State of the Art and Key Challenges

A Progress Report on Metal–Sulfur Batteries

Polysulfides in Magnesium‐Sulfur Batteries

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