Liquid K–Na Alloy Anode Enables Dendrite‐Free Potassium Batteries

Xue, Leigang; Gao, Hongcai; Zhou, Weidong; Xin, Sen; Park, Kyusung; Li, Yutao; Goodenough, John B

doi:10.1002/adma.201602633

Cited by 248 publications

(250 citation statements)

References 34 publications

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“…[70] Through anchoring silver nanoparticles (AgNPs) on carbon nanofibers (CNFs), a dendrite-free Li metal anode could be obtained. [73] We believe that exploring nondendritic lithium anode such as liquid lithium contained anode might be the most promising strategy for realizing the application of metallic lithium anodes. [71] These clearly proved that controlling the nucleation process of lithium should be further developed for achieving dendrite-free metallic lithium anodes.…”

Section: Discussionmentioning

confidence: 99%

A Material Perspective of Rechargeable Metallic Lithium Anodes

Wang

Yang

2018

Advanced Energy Materials

111

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Rechargeable lithium‐based batteries are long considered as the most promising candidates for application in various electronic devices, electric vehicles, and even electrical grids owing to their ultrahigh energy densities. However, to date, metallic lithium‐based batteries are still far from practical applications due to the low Coulombic efficiency and fast capacity decay of lithium anodes. The poor electrochemical performances of metallic lithium anodes are inherently related to random growth of lithium dendrites and infinite volume charge of lithium anodes. In this review, the failure mechanisms of metallic lithium anodes are summarized and ascribed to the unstable and inhomogeneous solid electrolyte interphase, uneven distributions of electric field, and lithium‐ion flux during the lithium plating processes. Correspondingly, efficient strategies for mitigating these problems, including surficial engineering, electric field, and lithium‐ion flux regulation are discussed from the perspective of anode materials. Finally, an outlook is proposed for the design and fabrication of next‐generation rechargeable metallic lithium anodes that aims to address the intrinsic problems of metallic lithium anodes.

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Section: Discussionmentioning

confidence: 99%

A Material Perspective of Rechargeable Metallic Lithium Anodes

Wang

Yang

2018

Advanced Energy Materials

111

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“…76 The room-temperature liquid alloy may also be a potential strategy to provide dendrite-free anode in contact with an organic liquid electrolyte when serving as anode materials. 77 ii) New kinds of separators with considerably improved mechanical and puncture strength as well as higher thermal stability (m.p. above 165 ℃) are highly desired.…”

Section: Comparison Of the Amount Of Lms Determined By Morphological mentioning

confidence: 99%

Study of the Mechanisms of Internal Short Circuit in a Li/Li Cell by Synchrotron X-ray Phase Contrast Tomography

et al. 2016

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Knowledge about degradation and failure of Li-ion batteries (LIBs) is of paramount importance especially because failure can be accompanied by severe hazards. To contribute to the understanding of such phenomena synchrotron in-line phase contrast Xray tomography was employed to investigate internal cell deformation and degradation caused by an internal short circuit (ISC). The tomographic images taken from an uncycled Li/Li cell and a short-circuited Li/Li cell reveal how lithium microstructures (LmS) develop during electrochemical stripping and plating during discharge and charge and how the three-layer separator used is damaged by growing LmSs and delaminates and melts as a consequence of an ISC. Previously unknown insights into the internal cell degradation and deformation mechanisms caused by an ISC are obtained and provide hints of how the properties of the separator could be modified in order to improve the reliability and safety of current and next-generation LIBs.

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“…It should be noted that the utilization of a lithium-metalfree anode and precise control of interphase stability significantly improved the cell stability and pushed practical and safe AMOBs a step forward. [76] Kang's group utilized the liquid Na-K alloy as a dendrite-free anode for K-O 2 battery, which provided a homogeneous and robust anode-electrolyte interface through its liquid-liquid connection. For example, prelithiated Al anode combined with an O 2 impermeable Nafion interlayer showed excellent stability in the Li-O 2 full cell.…”

Section: Alternative Anodesmentioning

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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Liquid K–Na Alloy Anode Enables Dendrite‐Free Potassium Batteries

Cited by 248 publications

References 34 publications

A Material Perspective of Rechargeable Metallic Lithium Anodes

A Material Perspective of Rechargeable Metallic Lithium Anodes

Study of the Mechanisms of Internal Short Circuit in a Li/Li Cell by Synchrotron X-ray Phase Contrast Tomography

Strategies Toward Stable Nonaqueous Alkali Metal–O₂ Batteries

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Liquid K–Na Alloy Anode Enables Dendrite‐Free Potassium Batteries

Cited by 248 publications

References 34 publications

A Material Perspective of Rechargeable Metallic Lithium Anodes

A Material Perspective of Rechargeable Metallic Lithium Anodes

Study of the Mechanisms of Internal Short Circuit in a Li/Li Cell by Synchrotron X-ray Phase Contrast Tomography

Strategies Toward Stable Nonaqueous Alkali Metal–O2 Batteries

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Strategies Toward Stable Nonaqueous Alkali Metal–O₂ Batteries