Formulierung von Elektrolyten mit gemischten Lithiumsalzen für Lithium‐Batterien

Xu, Gaojie; Shangguan, Xuehui; Dong, Shanmu; Zhou, Xinhong; Cui, Guanglei

doi:10.1002/ange.201906494

Angewandte Chemie

2019

DOI: 10.1002/ange.201906494

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Formulierung von Elektrolyten mit gemischten Lithiumsalzen für Lithium‐Batterien

Gaojie Xu

Xuehui Shangguan

Shanmu Dong

et al.

Abstract: Durch einfaches Mischen verschiedener Lithiumsalze im Elektrolyten werden Gemischtsalz‐Elektrolyte formuliert, um einen synergistischen Effekt zu bewirken. Auf dem Gebiet der Lithium‐Batterien der nächsten Generation wurden große Fortschritte mit Gemischtsalz‐Elektrolyten erzielt. In diesem Aufsatz wird die Entwicklung derartiger Gemischtsalz‐Elektrolyten näher ausgeführt. Die Ziele der Formulierung von Gemischtsalz‐Elektrolyten für Lithium‐Batterien werden zusammengefasst: Verbesserung der thermischen Stabili… Show more

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Cited by 17 publications

References 132 publications

(440 reference statements)

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A mechanically Robust, Damping, and High‐Temperature Tolerant Ion‐Conductive Elastomer for Noise‐Free Flexible Electronics

Shen,

Du,

Zhou

et al. 2024

Adv Funct Materials

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Ion‐conductive elastomers capable of damping can significantly mitigate the interference caused by mechanical noise during data acquisition in wearable and biomedical devices. However, currently available damping elastomers often lack robust mechanical properties and have a narrow temperature range for effective damping. Here, precise modulation of weak to strong ion‐dipole interactions plays a crucial role in bolstering network stability and tuning the relaxation behavior of supramolecular ion‐conductive elastomers (SICEs). The SICEs exhibit impressive mechanical properties, including a modulus of 13.2 MPa, a toughness of 65.6 MJ m−3, and a fracture energy of 74.9 kJ m−2. Additionally, they demonstrate remarkable damping capabilities, with a damping capacity of 91.2% and a peak tan δ of 1.11. Furthermore, the entropy‐driven rearrangement of ion‐dipole interactions ensures the damping properties of the SICE remain stable even at elevated temperatures (18–200 °C, with tan δ > 0.3), making it the most thermally resistant damping elastomer reported to date. Moreover, the SICE proves effective in filtering out various noises during physiological signal detection and strain sensing, highlighting its vast potential in flexible electronics.

show abstract

A mechanically Robust, Damping, and High‐Temperature Tolerant Ion‐Conductive Elastomer for Noise‐Free Flexible Electronics

Shen,

Du,

Zhou

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

A Diffusion‐‐Reaction Competition Mechanism to Tailor Lithium Deposition for Lithium‐Metal Batteries

et al. 2020

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Lithium metal is recognized as one of the most promising anode materials owing to its ultrahigh theoretical specific capacity and low electrochemical potential. Nonetheless, dendritic Li growth has dramatically hindered the practical applications of Li metal anodes. Realizing spherical Li deposition is an effective approach to avoid Li dendrite growth, but the mechanism of spherical deposition is unknown. Herein, a diffusion-reaction competition mechanism is proposed to reveal the rationale of different Li deposition morphologies. By controlling the rate-determining step (diffusion or reaction) of Li deposition, various Li deposition scenarios are realized, in which the diffusion-controlled process tends to lead to dendritic Li deposition while the reaction-controlled process leads to spherical Li deposition. This study sheds fresh light on the dendrite-free Li metal anode and guides to achieve safe batteries to benefit future wireless and fossil-fuel-free world.Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

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Beyond the Polysulfide Shuttle and Lithium Dendrite Formation: Addressing the Sluggish Sulfur Redox Kinetics for Practical High‐Energy Li‐S Batteries

Zhao

et al. 2020

Angewandte Chemie

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Electrolyte modulation simultaneously suppresses polysulfide the shuttle effect and lithium dendrite formation of lithium–sulfur (Li‐S) batteries. However, the sluggish S redox kinetics, especially under high S loading and lean electrolyte operation, has been ignored, which dramatically limits the cycle life and energy density of practical Li‐S pouch cells. Herein, we demonstrate that a rational combination of selenium doping, core–shell hollow host structure, and fluorinated ether electrolytes enables ultrastable Li stripping/plating and essentially no polysulfide shuttle as well as fast redox kinetics. Thus, high areal capacity (>4 mAh cm−2) with excellent cycle stability and Coulombic efficiency were both demonstrated in Li metal anode and thick S cathode (4.5 mg cm−2) with a low electrolyte/sulfur ratio (10 μL mg−1). This research further demonstrates a durable Li‐Se/S pouch cell with high specific capacity, validating the potential practical applications.

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Formulierung von Elektrolyten mit gemischten Lithiumsalzen für Lithium‐Batterien

Cited by 17 publications

References 132 publications

A mechanically Robust, Damping, and High‐Temperature Tolerant Ion‐Conductive Elastomer for Noise‐Free Flexible Electronics

A mechanically Robust, Damping, and High‐Temperature Tolerant Ion‐Conductive Elastomer for Noise‐Free Flexible Electronics

A Diffusion‐‐Reaction Competition Mechanism to Tailor Lithium Deposition for Lithium‐Metal Batteries

Beyond the Polysulfide Shuttle and Lithium Dendrite Formation: Addressing the Sluggish Sulfur Redox Kinetics for Practical High‐Energy Li‐S Batteries

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