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

Wu, Shichao; Tang, Jing; Li, Fujun; Liu, Xizheng; Yamauchi, Yusuke; Ishida, M.; Zhou, Haoshen

doi:10.1002/adfm.201505420

Cited by 81 publications

(95 citation statements)

References 54 publications

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“…However, the intrinsic nature of Li 2 O 2 and its intermediates can lead to the formation of detrimental byproducts, which subsequently results in the increase of charge/discharge overpotentials and eventual battery death . Recently, our group demonstrated Li–O 2 cells can be cycled via the reversible formation and decomposition of LiOH, when adding 120 ppm H 2 O in electrolytes or cycling Li–O 2 cells in humid O 2 gas, with LiFePO 4 as anodes. Grey and co‐workers also proved that the LiOH can be readily removed and formed on cathode, by applying the electrolyte with H 2 O and LiI as additives .…”

Section: Methodsmentioning

confidence: 99%

Developing a “Water‐Defendable” and “Dendrite‐Free” Lithium‐Metal Anode Using a Simple and Promising GeCl₄ Pretreatment Method

et al. 2018

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Lithium metal is an ultimate anode in "next-generation" rechargeable batteries, such as Li-sulfur batteries and Li-air (Li-O ) batteries. However, uncontrollable dendritic Li growth and water attack have prevented its practical applications, especially for open-system Li-O batteries. Here, it is reported that the issues can be addressed via the facile process of immersing the Li metal in organic GeCl -THF steam for several minutes before battery assembly. This creates a 1.5 µm thick protection layer composed of Ge, GeO , Li CO , LiOH, LiCl, and Li O on Li surface that allows stable cycling of Li electrodes both in Li-symmetrical cells and Li-O cells, especially in "moist" electrolytes (with 1000-10 000 ppm H O) and humid O atmosphere (relative humidity (RH) of 45%). This work illustrates a simple and effective way for the unfettered development of Li-metal-based batteries.

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Section: Methodsmentioning

confidence: 99%

Developing a “Water‐Defendable” and “Dendrite‐Free” Lithium‐Metal Anode Using a Simple and Promising GeCl₄ Pretreatment Method

et al. 2018

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“…[38,[176][177][178] However, the story of Li-O 2 batteries is different from LIB and Li-S batteries in which the cathodes are based on intercalation and conversion reactions, respectively. [183] Nonetheless, an excess amount of water molecules in the electrolytes results in the formation of LiOH, which might have a parasitic effect. Even in nonaqueous electrolytes, some reports stressed the essential role of a small amount of water in the electrolyte for achieving a high capacity (associated with the formation of toroidal www.advenergymat.de www.advancedsciencenews.com structure).…”

Section: Li-o 2 Batteriesmentioning

confidence: 99%

High‐Energy Aqueous Lithium Batteries

Eftekhari¹

2018

Advanced Energy Materials

152

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research, aqueous electrolytes were occasionally employed for the investigation of cathode materials instead of the conventional nonaqueous electrolytes. [9,10] It was discussed that the simplicity of an aqueous electrolyte provides a better opportunity for the fundamental studies of the process of intercalation/deintercalation of Li-ions as opposed to the nonaqueous electrolytes. For instance, although the formation of solid electrolyte interphase (SEI) is of utmost importance for the cyclability of LIB, the significant role of the electrolyte does not allow to exclusively study the electrochemical behavior of the electrode material under consideration. The current research has specifically targeted the development of ARLBs, but in practice, most of the recent papers have followed the same line of research in investigating a limited range of cathode and anode materials in the same aqueous electrolytes. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] A possible reason is that the key advantage of ARLBs was low cost, and thus, the focus was limited to a few inexpensive materials (e.g., lithium salts). Aqueous electrolytes are definitely excellent choices for the fundamental studies of electrode materials, but the practical development of ARLBs needs overcoming the key obstacles rather than finding more cathode materials.In any case, aqueous electrolytes were occasionally used during the 2000s by various research groups, but there was no vivid plan for the development of ARLBs. These works have been extensively reviewed before, [29][30][31][32][33] and it is not aimed to repeat the general works on aqueous electrolytes here. During the recent years, new opportunities have been introduced, which can extend the stable potential window of aqueous electrolyte to the range of 3-4 V. Upon this advancement, aqueous electrolytes can fairly compete with the conventional nonaqueous electrolytes for the fabrication of cheaper and safer LIBs. On the other hand, novel designs such as self-healing [34] or flexible [16,35,36] ARLBs have paved the path for new practical potentials of aqueous electrolytes. The present paper specifically focuses on the recent advancements and attempts to foster the strategy of research to shed light on the pathway of this emerging area of research. Two factors are directly responsible for achieving a high energy density, the specific capacity, and the cell voltage. Since the former is not massively controlled by the electrolyte and the specific capacity of most electroactive Owing to the high voltage of lithium-ion batteries (LIBs), the dominating electrolyte is non-aqueous. The idea of an aqueous rechargeable lithium battery (ARLB) dates back to 1994, but it had attracted little attention due to the narrow stable potential window of aqueous electrolytes, which results in low energy density. However, aqueous electrolytes were employed during the 2000s for the fundamental studies of electrode materials in the absence of side reactions such as the decomposition of organic spec...

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“…Following this idea, in a tetraglyme (G4)-based electrolyte, 4,600 p.p.m. of H 2 O was introduced to reduce the charge potential to ∼3.3 V34 and, by integrating a hydrophobic ionic liquid-based electrolytes, Wu et al 35. realized a synergistic system for Li-O 2 batteries in a humid atmosphere (relative humidity of 51%) and a charge potential of ∼3.34 V was attained.…”

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confidence: 99%

Organic hydrogen peroxide-driven low charge potentials for high-performance lithium-oxygen batteries with carbon cathodes

Qiao

Yang

et al. 2017

Nat Commun

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Reducing the high charge potential is a crucial concern in advancing the performance of lithium-oxygen batteries. Here, for water-containing lithium-oxygen batteries with lithium hydroxide products, we find that a hydrogen peroxide aqueous solution added in the electrolyte can effectively promote the decomposition of lithium hydroxide compounds at the ultralow charge potential on a catalyst-free Ketjen Black-based cathode. Furthermore, for non-aqueous lithium-oxygen batteries with lithium peroxide products, we introduce a urea hydrogen peroxide, chelating hydrogen peroxide without any water in the organic, as an electrolyte additive in lithium-oxygen batteries with a lithium metal anode and succeed in the realization of the low charge potential of ∼3.26 V, which is among the best levels reported. In addition, the undesired water generally accompanying hydrogen peroxide solutions is circumvented to protect the lithium metal anode and ensure good battery cycling stability. Our results should provide illuminating insights into approaches to enhancing lithium-oxygen batteries.

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

Cited by 81 publications

References 54 publications

Developing a “Water‐Defendable” and “Dendrite‐Free” Lithium‐Metal Anode Using a Simple and Promising GeCl₄ Pretreatment Method

Developing a “Water‐Defendable” and “Dendrite‐Free” Lithium‐Metal Anode Using a Simple and Promising GeCl₄ Pretreatment Method

High‐Energy Aqueous Lithium Batteries

Organic hydrogen peroxide-driven low charge potentials for high-performance lithium-oxygen batteries with carbon cathodes

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

Cited by 81 publications

References 54 publications

Developing a “Water‐Defendable” and “Dendrite‐Free” Lithium‐Metal Anode Using a Simple and Promising GeCl4 Pretreatment Method

Developing a “Water‐Defendable” and “Dendrite‐Free” Lithium‐Metal Anode Using a Simple and Promising GeCl4 Pretreatment Method

High‐Energy Aqueous Lithium Batteries

Organic hydrogen peroxide-driven low charge potentials for high-performance lithium-oxygen batteries with carbon cathodes

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Product

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Developing a “Water‐Defendable” and “Dendrite‐Free” Lithium‐Metal Anode Using a Simple and Promising GeCl₄ Pretreatment Method

Developing a “Water‐Defendable” and “Dendrite‐Free” Lithium‐Metal Anode Using a Simple and Promising GeCl₄ Pretreatment Method