Mapping a stable solvent structure landscape for aprotic Li–air battery organic electrolytes

Feng, Shuting; Chen, Mao; Giordano, Livia; Huang, Mingjun; Zhang, Wenxu; Amanchukwu, Chibueze V.; Anandakathir, Robinson; Shao‐Horn, Yang; Johnson, Jeremiah A.

doi:10.1039/c7ta08321a

Cited by 34 publications

(70 citation statements)

References 62 publications

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“…3) following the BANE framework we developed recently. 40 We observed that higher computed electrochemical oxidation potential correlated well with higher average aromatic carbon charge, c + . More specifically, FAST salts with the greatest number of electron donating Pip groups (e.g., A-Pip 2 ORF 2 ) exhibit the lowest c + and electrochemical oxidative stability.…”

Section: View Article Onlinementioning

confidence: 57%

“…Next, the chemical stability of various FAST salts was investigated under solution conditions designed to mimic the oxygen electrode of a typical aprotic Li-air battery. 40,46,47 Each FAST salt was dissolved in DMF (20 mg mL À1 ) and mixed with 12.5 equivalents of Li 2 O 2 , KO 2 , and 1 equivalent of 4-methoxybiphenyl as internal standard (for quantitative NMR analysis); the mixture was stirred at 80 1C for 3 days. The supernatant of the mixture was characterized by 1 H, 19 F-NMR, and liquid chromatography-mass spectrometry (LC-MS).…”

Section: Papermentioning

confidence: 99%

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Fluorinated Aryl Sulfonimide Tagged (FAST) salts: modular synthesis and structure–property relationships for battery applications

Huang

Feng

Zhang

et al. 2018

Energy Environ. Sci.

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Section: View Article Onlinementioning

confidence: 57%

Section: Papermentioning

confidence: 99%

Fluorinated Aryl Sulfonimide Tagged (FAST) salts: modular synthesis and structure–property relationships for battery applications

Huang

Feng

Zhang

et al. 2018

Energy Environ. Sci.

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“…2019, 9, 1900464 Figure 9. [86] In consideration of the complex circumstances in Li-O 2 chemistry, they proposed four key descriptors for the assessment: (1) bond dissociation energy, (2) deprotonation free energy, (3) nucleophilic substitution free energy, and (4) electrochemical oxidation/reduction. b) Chemical structure of DMDMB.…”

Section: Rational Design Of Solvent Moleculementioning

confidence: 99%

Strategies Toward Stable Nonaqueous Alkali Metal–O₂ Batteries

Zhang

Huang

Liu

et al. 2019

Advanced Energy Materials

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Alkali metal–O2 batteries, by coupling high‐capacity alkali metal anodes with gaseous oxygen, possess extremely high gravimetric energy density that is comparable to gasoline and are potential energy storage technologies beyond lithium–ion batteries. The development of alkali metal–O2 batteries has achieved great progress in recent years, from materials to prototype devices and on fundamental mechanisms. The stability of alkali metal–O2 batteries is still poor, however, leading to a huge gap between laboratory research and commercial applications. A series of parasitic reactions result in the instability, which occur during electrochemical discharging and charging. The ubiquitous active oxygen species attack both the organic electrolyte and the carbon cathode, triggering various parasitic reactions. Meanwhile, dendrite growth and volume expansion upon repeated plating/stripping and O2 crossover severely limit the reversibility of alkali metal anodes. Here, an overview of the strategies against these issues is given to improve the stability of nonaqueous alkali metal–O2 batteries, which is discussed from three aspects: air cathodes, alkali metal anodes, and aprotic electrolytes. Furthermore, perspectives for future research of stable alkali metal–O2 batteries are outlined.

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“…In this study, we explored the CO 2 effect in Li–O 2 cells using a tetraglyme‐based electrolyte solution, and investigated the Br 3 − /Br 2 redox couple employed to suppress high RC potential. The tetraglyme solution has remained unexplored in the investigation of the CO 2 effect, despite its versatile use in Li–O 2 cells . In the presence of ≤30% of CO 2 gas, we measured the effect of soluble products, CO 4 2− and C 2 O 6 2− , and their reasonable stability in the tetraglyme electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic Study Revealing the Role of the Br₃⁻/Br₂ Redox Couple in CO₂‐Assisted Li–O₂ Batteries

Mota

Kang

Jung

et al. 2020

Advanced Energy Materials

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Replacing oxygen (O2) with air is a critical step in the development of lithium (Li)–air batteries. A trace amount of carbon dioxide (CO2) in the air is, however, influentially involved in the O2 chemistry, which indicates that a fundamental understanding of the effect of CO2 is required for the design of practical cells. When up to 30% CO2 is added to Li–O2 cells, CO2 acts as an O2− scavenger. Their chemical reactions form soluble products, CO42− and C2O62−, in the tetraglyme electrolyte solution, and enhance full capacity and cell cyclability. A critical challenge is, however, the sluggish decomposition of the coproduct Li2CO3 during recharge. To lower the charging overpotential, a Br3−/Br2 redox couple is incorporated and its redox behavior is investigated using spectroscopic methods. The redox shuttle of Br3−/Br2 decomposes amorphous Li2CO3 more efficiently than its crystalline counterpart. It is revealed that Br2 combines with Br3− to form a Br2···Br3− complex, which acts as a mobile catalyst in the electrolyte solution without swift precipitation of the nonpolar Br2. This comprehensive study, revealing the molecular structure and redox process of mobile catalysts, provides an insight into improving the design of redox couples toward superior cycling performance.

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Mapping a stable solvent structure landscape for aprotic Li–air battery organic electrolytes

Abstract: Electrolyte instability is one of the greatest impediments that must be overcome for the practical development of rechargeable aprotic Li–air batteries.

Cited by 34 publications

References 62 publications

Fluorinated Aryl Sulfonimide Tagged (FAST) salts: modular synthesis and structure–property relationships for battery applications

Fluorinated Aryl Sulfonimide Tagged (FAST) salts: modular synthesis and structure–property relationships for battery applications

Strategies Toward Stable Nonaqueous Alkali Metal–O₂ Batteries

Mechanistic Study Revealing the Role of the Br₃⁻/Br₂ Redox Couple in CO₂‐Assisted Li–O₂ Batteries

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Mapping a stable solvent structure landscape for aprotic Li–air battery organic electrolytes

Abstract: Electrolyte instability is one of the greatest impediments that must be overcome for the practical development of rechargeable aprotic Li–air batteries.

Cited by 34 publications

References 62 publications

Fluorinated Aryl Sulfonimide Tagged (FAST) salts: modular synthesis and structure–property relationships for battery applications

Fluorinated Aryl Sulfonimide Tagged (FAST) salts: modular synthesis and structure–property relationships for battery applications

Strategies Toward Stable Nonaqueous Alkali Metal–O2 Batteries

Mechanistic Study Revealing the Role of the Br3−/Br2 Redox Couple in CO2‐Assisted Li–O2 Batteries

Contact Info

Product

Resources

About

Strategies Toward Stable Nonaqueous Alkali Metal–O₂ Batteries

Mechanistic Study Revealing the Role of the Br₃⁻/Br₂ Redox Couple in CO₂‐Assisted Li–O₂ Batteries