Instability of Ionic Liquid-Based Electrolytes in Li–O<sub>2</sub> Batteries

Das, Supti; Højberg, Jonathan; Knudsen, Kristian B.; Younesi, Reza; Johansson, Patrik; Norby, Poul; Vegge, Tejs

doi:10.1021/acs.jpcc.5b04950

Cited by 82 publications

(66 citation statements)

References 44 publications

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“…In addition, PYR 12O1 + displayed a high LiO x generation activity to realize a superior O 2 supply capability in Li–air battery applications . Among the various RTILs, pyrrolidinium and piperidinium cations are more stable than imidazolium and quaternary ammonium cations in Li–air batteries, as confirmed by differential electrochemical mass spectrometry (DEMS) tests . In particular, N ‐methyl‐ N ‐butylpyrrolidinium bis(trifluoromethansulfonyl)amide (PYR 14 TFSI) shows better stability and performance than DME as the electrolyte of Li–air batteries.…”

Section: Ionic‐liquid Electrolytesmentioning

confidence: 92%

Electrolytes for Rechargeable Lithium–Air Batteries

et al. 2019

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Lithium–air batteries are promising devices for electrochemical energy storage because of their ultrahigh energy density. However, it is still challenging to achieve practical Li–air batteries because of their severe capacity fading and poor rate capability. Electrolytes are the prime suspects for cell failure. In this Review, we focus on the opportunities and challenges of electrolytes for rechargeable Li–air batteries. A detailed summary of the reaction mechanisms, internal compositions, instability factors, selection criteria, and design ideas of the considered electrolytes is provided to obtain appropriate strategies to meet the battery requirements. In particular, ionic liquid (IL) electrolytes and solid‐state electrolytes show exciting opportunities to control both the high energy density and safety.

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Section: Ionic‐liquid Electrolytesmentioning

confidence: 92%

Electrolytes for Rechargeable Lithium–Air Batteries

et al. 2019

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“…[108][109][110][111][112][113][114][115] Ionic liquids have very low salt solubility and poor conductivity, however, which may hinder the formation of an SEI on lithium metal and limit the rate capacity. [116] Thermophysical property comparisons of some common ionic liquids with DME and DMSO electrolytes are listed in Table 1. [98,116] It is obvious that ionic liquids have much higher viscosity and relatively lower O 2 diffusivity coefficients compared with DME and DMSO.…”

Section: Ionic Liquidsmentioning

confidence: 99%

“…[116] Thermophysical property comparisons of some common ionic liquids with DME and DMSO electrolytes are listed in Table 1. [98,116] It is obvious that ionic liquids have much higher viscosity and relatively lower O 2 diffusivity coefficients compared with DME and DMSO.…”

Section: Ionic Liquidsmentioning

confidence: 99%

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Review of Electrolytes in Nonaqueous Lithium–Oxygen Batteries

Guo

Luo

Chen

et al. 2018

Advanced Sustainable Systems

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Based on an inexhaustible and ubiquitous source of oxygen, the lithium-oxygen batteries are currently the subject of much scientific investigation because of their potential for extremely high energy density. The electrocatalytic materials for them have been extensively researched during the past decade. Even though they are a key component in the lithium-oxygen batteries, however, the study of electrolytes is still in its primary stage. Electrolytes have an important influence on the electrochemical performance of lithium-oxygen batteries, especially on their cycling stability and rate capacity. Therefore, it is important to select an ideal electrolyte with excellent stability against attack by reaction intermediates, along with excellent oxygen solubility and diffusivity. In this review, the physicochemical and electrochemical properties of organic electrolytes for lithium-oxygen batteries are discussed and compared. Furthermore, possible research directions are proposed for the development of an ideal electrolyte for enhanced electrochemical performance. Disciplines Engineering | Physical Sciences and Mathematics Publication DetailsGuo, H., Luo, W., Chen, J., Chou, S., Liu, H. & Wang, J. (2018 Figure 1. Unlike the intercalation mechanism of lithium-ion batteries or sodium-ion batteries, the Li-O 2 battery systems employ a dissolution/ deposition reaction with an air electrode that uses oxygen as the cathode electrode during the electrochemical processes. Research on the Li-O 2 battery is complicated by the need for exposure the air cathode to O 2 atmosphere.Many advances have been achieved, which include advances on cathode materials, electrolytes, anode materials, and redox mediators. [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] Several excellent reviews have been published to summarize recent developments and our current understanding of Li-O 2 batteries, especially with respect to the cathode electrocatalytic materials. [25][26][27][28][29][30][31][32][33][34][35] These reviews have comprehensively discussed the relationship between the structure of electrocatalytic materials and the electrochemical performance of Li-O 2 batteries. There are, however, few reviews focused on the effects of different electrolytes on the electrochemical performance of the Li-O 2 batteries. [36][37][38] For the aqueous Li-O 2 batteries, LiOH is generated or oxidized at the cathode during discharge and charge processes because H 2 O and O 2 are involved in the reactions. In the case of the nonaqueous Li-O 2 batteries, there are two essential processes that determine their electrochemical performance: the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). During the ORR process, the Li 2 O 2 is precipitated as the final discharge product on the air cathode, while during the OER process, Li 2 O 2 is then decomposed and the O 2 is regenerated. Therefore, there are huge differences between aqueous and nonaqueous Li-O 2 batteries. Since the nonaqueous Li-O 2 batteries have dominated ...

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“…However, this reaction suffers from low reversibility leading to a low cyclability of the battery. Recently, Room Temperature Ionic Liquids (RTILs) attracted much attention for Li−O 2 battery electrolyte . Namely, Nakamoto et al .…”

Section: Ionic Conductivity Viscosity Degradation Temperature Capamentioning

confidence: 99%

Suitability of Blended Ionic Liquid‐Dimethylsulfoxide Electrolyte for Lithium‐Oxygen Battery

Knipping

Aucher

Guirado

et al. 2018

Batteries & Supercaps

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Electrolytes composed of dimethylsulfoxide (DMSO), 1‐ethyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide (EMI TFSI) and LiClO4 are characterized for application in lithium‐oxygen batteries. The increase of EMI TFSI content in the electrolyte enables to improve its thermal stability and to decrease the overpotential of the cell. The optimum addition of EMI TFSI enables to reduce the overpotential from 1.43 V to 1.06 V, with a cyclability of 69 cycles with 600 mAh g−1 of limited capacity.

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Instability of Ionic Liquid-Based Electrolytes in Li–O₂ Batteries

Cited by 82 publications

References 44 publications

Electrolytes for Rechargeable Lithium–Air Batteries

Electrolytes for Rechargeable Lithium–Air Batteries

Review of Electrolytes in Nonaqueous Lithium–Oxygen Batteries

Suitability of Blended Ionic Liquid‐Dimethylsulfoxide Electrolyte for Lithium‐Oxygen Battery

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Instability of Ionic Liquid-Based Electrolytes in Li–O2 Batteries

Cited by 82 publications

References 44 publications

Electrolytes for Rechargeable Lithium–Air Batteries

Electrolytes for Rechargeable Lithium–Air Batteries

Review of Electrolytes in Nonaqueous Lithium–Oxygen Batteries

Suitability of Blended Ionic Liquid‐Dimethylsulfoxide Electrolyte for Lithium‐Oxygen Battery

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Instability of Ionic Liquid-Based Electrolytes in Li–O₂ Batteries