Low charge overpotentials in lithium–oxygen batteries based on tetraglyme electrolytes with a limited amount of water

Wu, Shichao; Tang, Jing; Li, Fujun; Liu, Xizheng; Zhou, Haoshen

doi:10.1039/c5cc06370a

Cited by 63 publications

(89 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This is the reason why a trace amount of water in electrolytes can catalyze the reactions on the cathode of Li–air batteries during discharge and charge, thereby resulting in increased capacity . The charge overpotentials and the morphologies of the discharge products depend on the H 2 O concentration in the electrolyte (Figure f–j) . If an excess amount of H 2 O is present in the electrolyte, the discharge product will be disk‐shaped LiOH instead of the typical toroidal‐shaped Li 2 O 2 .…”

Section: Aprotic Electrolytesmentioning

confidence: 99%

Section: Aprotic Electrolytesmentioning

confidence: 99%

“…[86,102] Thec harge overpotentials and the morphologies of the discharge products depend on the H 2 O concentration in the electrolyte (Figure 4f-j). [103] If an excess amount of H 2 Oi sp resent in the electrolyte,t he discharge product will be disk-shaped LiOH instead of the typical toroidal-shaped Li 2 O 2 .R ecently,Z hou and co-workers proposed anovel H 2 O 2 additive that assists the decomposition of either solid LiOH compounds at the cathode or dissolved LiOH in the electrolyte in aH 2 O-containing Li-O 2 battery. [104] Theaddition of H 2 O 2 greatly decreased the charge plateau to 3.50 Vand increased the charge capacity to above 1.40 mAh.…”

Section: Effect Of Moisture On Li-air Battery Performancementioning

confidence: 99%

See 2 more Smart Citations

Electrolytes for Rechargeable Lithium–Air Batteries

et al. 2019

View full text Add to dashboard Cite

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.

show abstract

Section: Aprotic Electrolytesmentioning

confidence: 99%

Section: Aprotic Electrolytesmentioning

confidence: 99%

Section: Effect Of Moisture On Li-air Battery Performancementioning

confidence: 99%

See 1 more Smart Citation

Electrolytes for Rechargeable Lithium–Air Batteries

et al. 2019

View full text Add to dashboard Cite

show abstract

“…In the field of electrochemical catalysis, the defects are considered to be good catalytic sites for the electrochemical reaction with oxygen. Because of its unique structural characteristics, γ‐MnO 2 is a promising oxygen catalyst and has been widely used as cathodic catalyst of Li–O 2 battery . According to the different preparation methods, γ‐phase MnO 2 can be divided into CMD and EMD.…”

Section: The Types Of Manganese‐based Oxides For Li–o2 Battery Cathodmentioning

confidence: 99%

“…In other words, the electrochemical reaction is only partially reversible. To solve these problems, Zhou and co‐workers studied the effect of water on the electrochemical processes of EMD‐catalyzed Li–O 2 batteries in detail, and demonstrated that dimethyl sulfoxide (DMSO) and tetraglyme (G4) containing trace water could match well with an EMD/Ru/Super P carbon cathode. Using this system, the overpotential was reduced to ≈0.21 V at 500 mA g −1 , and superior rate performance and cycling stability were obtained ( Figure a,b).…”

Section: The Types Of Manganese‐based Oxides For Li–o2 Battery Cathodmentioning

confidence: 99%

Advances in Manganese‐Based Oxides Cathodic Electrocatalysts for Li–Air Batteries

Bao

Sun

Liu

et al. 2018

Adv Funct Materials

132

View full text Add to dashboard Cite

Li-air batteries, characteristic of superhigh theoretical specific energy density, cost-efficiency, and environment-friendly merits, have aroused ever-increasing attention. Nevertheless, relatively low Coulomb efficiency, severe potential hysteresis, and poor rate capability, which mainly result from sluggish oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) kinetics, as well as pitiful cycle stability caused by parasitic reactions, extremely limit their practical applications. Manganese (Mn)-based oxides and their composites can exhibit high ORR and OER activities, reduce charge/discharge overpotential, and improve the cycling stability when used as cathodic catalyst materials. Herein, energy storage mechanisms for Li-air batteries are summarized, followed by a systematic overview of the progress of manganesebased oxides (MnO 2 with different crystal structures, MnO, MnOOH, Mn 2 O 3 , Mn 3 O 4 , MnOx, perovskite-type and spinel-type manganese oxides, etc.) cathodic materials for Li-air batteries in the recent years. The focus lies on the effects of crystal structure, design strategy, chemical composition, and microscopic physical parameters on ORR and OER activities of variousMn-based oxides, and even the overall performance of Li-air batteries. Finally, a prospect of the research for Mn-based oxides cathodic catalysts in the future is made, and some new insights for more reasonable design of Mn-based oxides electrocatalysts with higher catalytic efficiency are provided.

show abstract

A Synergistic System for Lithium–Oxygen Batteries in Humid Atmosphere Integrating a Composite Cathode and a Hydrophobic Ionic Liquid‐Based Electrolyte

Tang

et al. 2016

Adv Funct Materials

Self Cite

View full text Add to dashboard Cite

Moisture in air is a major obstacle for realizing practical lithium‐air batteries. Here, we integrate a hydrophobic ionic liquid (IL)‐based electrolyte and a cathode composed of electrolytic manganese dioxide and ruthenium oxide supported on Super P (carbon black) to construct a promising system for Li‐O2 battery that can be sustained in humid atmosphere (RH: 51%). A high discharge potential of 2.94 V and low charge potential of 3.34 V for 218 cycles are achieved. The outstanding performance is attributed to the synergistic effect of the unique hydrophobic IL‐based electrolyte and the composite cathode. This is the first time that such excellent performance is achieved in humid O2 atmosphere and these results are believed to facilitate the realization of practical lithium‐air batteries.

show abstract

Low charge overpotentials in lithium–oxygen batteries based on tetraglyme electrolytes with a limited amount of water

Cited by 63 publications

References 42 publications

Electrolytes for Rechargeable Lithium–Air Batteries

Electrolytes for Rechargeable Lithium–Air Batteries

Advances in Manganese‐Based Oxides Cathodic Electrocatalysts for Li–Air Batteries

A Synergistic System for Lithium–Oxygen Batteries in Humid Atmosphere Integrating a Composite Cathode and a Hydrophobic Ionic Liquid‐Based Electrolyte

Contact Info

Product

Resources

About