Three-Dimensional Nitrogen-Doped Carbonaceous Networks Anchored with Cobalt as Separator Modification Layers for Low-Polarization and Long-Lifespan Aluminum–Sulfur Batteries

Xu, Cheng; Zarrabeitia, Maider; Li, Yueliang; Biskupek, Johannes; Kaiser, Ute; Liu, Xu; Passerini, Stefano

doi:10.1021/acsnano.3c08476

Cited by 7 publications

(2 citation statements)

References 33 publications

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“…Recently, our group reported a low-polarization and long-lifespan AlÀ S batteries in which the kinetics was improved by a separator modified with a layer of 3D nitrogen-doped carbonaceous networks anchored with cobalt, namely, Co@C Mel-ZIF @GF/D. [47] Herein, this modified separator is combined with the Al/EAdF-0.8/S cells for the electrochemical tests at low temperatures. With this modified separator, the polarization is effectively reduced (Figure 6g) and the capacity at the 100 th cycle is improved to 464 mAh g À 1 even at À 10 °C.…”

Section: Methodsmentioning

confidence: 99%

Locally Concentrated Ionic Liquid Electrolytes for Wide‐Temperature‐Range Aluminum‐Sulfur Batteries

Xu,

Diemant,

Mariani

et al. 2024

Angew Chem Int Ed

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Aluminum sulfur (Al‐S) batteries are promising energy storage devices due to their high theoretical capacity, low cost, and high safety. However, the high viscosity and inferior ion transport of conventionally used ionic liquid electrolytes (ILEs) limit the kinetics of Al‐S batteries, especially at sub‐zero temperatures. Herein, locally concentrated ionic liquid electrolytes (LCILE) formed via diluting the ILEs with non‐solvating 1,2‐difluorobenzene (dFBn) co‐solvent are proposed for wide‐temperature‐range Al‐S batteries. The addition of dFBn effectively promotes the fluidity and ionic conductivity without affecting the AlCl4‐/Al2Cl7‐ equilibrium, which preserves the reversible stripping/plating of aluminum and further promotes the overall kinetics of Al‐S batteries. As a result, Al‐S cells employing the LCILE exhibit higher specific capacity, better cyclability, and lower polarization with respect to the neat ILE in a wide temperature range from ‐20 to 40 °C. For instance, Al‐S batteries employing the LCILE sustain a remarkable capacity of 507 mAh g‐1 after 300 cycles at 20 °C, while only 229 mAh g‐1 is delivered with the dFBn‐free electrolyte under the same condition. This work demonstrates the favorable use of LCILEs for wide‐temperature Al‐S batteries.

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Section: Methodsmentioning

confidence: 99%

Locally Concentrated Ionic Liquid Electrolytes for Wide‐Temperature‐Range Aluminum‐Sulfur Batteries

Xu,

Diemant,

Mariani

et al. 2024

Angew Chem Int Ed

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“…[4,5] The electricity can be released again via electrochemical oxidation of the stored Al metal in AlÀ air batteries. Due to the earth abundance, low cost, and easy storage of Al metal, [6,7] as well as the high energy density of AlÀ air batteries (8100 Wh kg Al À 1…”

Section: Introductionmentioning

confidence: 99%

Al−Air Batteries for Seasonal/Annual Energy Storage: Progress beyond Materials

Xu,

Liu,

Sumińska‐Ebersoldt

et al. 2024

Batteries & Supercaps

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Cost‐effective and zero‐carbon‐emission seasonal/annual energy storage is highly required to achieve the Zero Emission Scenario (ZES) by 2050. The combination of Al production via inert‐anode smelting and Al conversion to electricity via Al‐air batteries is a potential option. Although playing an important role in this approach, Al‐air batteries, however, suffer from limited specific energy and inefficient collection of the discharge product. Herein, an important progress in addressing these issues is summarized, emphasizing the importance of non‐material, but rather process‐related aspects. First, a recently reported approach allowing controllable collection of discharge product and electrolyte regeneration is presented. Next, the impact of operational parameters on improving electrochemical performance of Al‐air batteries is summarized. Subsequently, the importance of cell design in addressing the obstacles of Al‐air batteries is emphasized. Last, a perspective on future research directions is proposed.

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Locally Concentrated Deep Eutectic Liquids Electrolytes for Low‐Polarization Aluminum Metal Batteries

Xu,

Diemant,

Liu

et al. 2024

Advanced Materials

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Low‐cost and nontoxic deep eutectic liquid electrolytes (DELEs), such as [AlCl3]1.3[Urea] (AU), are promising for rechargeable non‐aqueous aluminum metal batteries (AMBs). However, their high viscosity and sluggish ion transport at room temperature lead to high cell polarization and low specific capacity, limiting their practical application. Herein, non‐solvating 1,2‐difluorobenzene (dFBn) is proposed as a co‐solvent of DELEs using AU as model to construct a locally concentrated deep eutectic liquid electrolyte (LC‐DELE). dFBn effectively improves the fluidity and ion transport without affecting the ionic dynamics in the electrolyte. Moreover, dFBn also modifies the solid electrolyte interphase growing on the aluminum metal anodes and reduces the interfacial resistance. As a result, the lifespan of Al/Al cells is improved from 210 h to 2000 h, and the cell polarization is reduced from 0.36 to 0.14 V at 1.0 mA cm−2. The rate performance of Al‐graphite cells is greatly improved with a polarization reduction of 0.15 and 0.74 V at 0.1 and 1 A g−1, respectively. The initial discharge capacity of Al‐sulfur cells is improved from 94 to 1640 mAh g−1. This work provides a feasible solution to the high polarization of AMBs employing DEL‐based electrolytes and a new path to high‐performance low‐cost AMBs.This article is protected by copyright. All rights reserved

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Three-Dimensional Nitrogen-Doped Carbonaceous Networks Anchored with Cobalt as Separator Modification Layers for Low-Polarization and Long-Lifespan Aluminum–Sulfur Batteries

Cited by 7 publications

References 33 publications

Locally Concentrated Ionic Liquid Electrolytes for Wide‐Temperature‐Range Aluminum‐Sulfur Batteries

Locally Concentrated Ionic Liquid Electrolytes for Wide‐Temperature‐Range Aluminum‐Sulfur Batteries

Al−Air Batteries for Seasonal/Annual Energy Storage: Progress beyond Materials

Locally Concentrated Deep Eutectic Liquids Electrolytes for Low‐Polarization Aluminum Metal Batteries

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