Precipitation-free aluminum-air batteries with high capacity and durable service life

Lv, Chaonan; Li, Yixin; Zhu, Yuanxin; Zhang, Yuxin; Kuang, Jialin; Huang, Dan; Tang, Yougen; Wang, Haiyan

doi:10.1016/j.cej.2023.142182

Cited by 14 publications

(5 citation statements)

References 43 publications

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“…It has been reported that Al(OH) 3 could precipitate on the surface on AMAs and air cathodes with the further reaction blocked. [29] Moreover, the uncontrolled deposition of Al(OH) 3 leads to the plugging of cell components as well as difficulties in its collection for the use in further Al production. The use of flowing electrolyte to mitigate the voltage decay and prolongs the discharge lifespan of AlÀ air cells has been already reported, [30] but the beneficial effect was only associated to the larger volume of the employed electrolyte.…”

Section: Discharge Product Control and Electrolyte Regenerationmentioning

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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Section: Discharge Product Control and Electrolyte Regenerationmentioning

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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“…Due to the limited solubility of Al(OH) 3 in the AABs using a conventional neutral salt electrolyte, these microcrystal Al-(OH) 3 byproducts tend to agglomerate together and finally evolve into solid precipitates, as depicted in Figure 1a. On the one hand, these Al(OH) 3 precipitates accumulate on the Al anode surface and hinder further stripping of Al 3+ while inducing corrosion underneath the deposits, 48 consequently resulting in an increase in cell polarization. On the other hand, as the discharge progresses, Al(OH) 3 agglomerates into larger particles (a few microns in size) that rapidly settle down in the battery; this increases the viscosity, decreases ionic conductivity, and even causes cell short circuits.…”

Section: Effect Of the Pam Sol Electrolytementioning

confidence: 99%

Guiding Uniform Al Stripping with a Polymer Sol Electrolyte for Long-Lasting Al-Air Batteries

Miao,

Li,

Yang

et al. 2024

ACS Appl. Energy Mater.

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Aqueous aluminum-air batteries (AABs) have garnered significant research interest due to their inherent safety, high energy density, and costeffectiveness advantages. Nevertheless, the widespread application of AABs is constrained by challenges such as undesired parasitic self-corrosion and continuously accumulated byproducts over time. Here, an anticorrosive polyacrylamide (PAM) sol electrolyte is designed to modulate the interfacial reactions at the aluminum (Al) anodes. The PAM sol with a hydrogen bonding network refines the electrolyte's solvated environment, thus mitigating Al anode corrosion by 56.36% when benchmarked against a 20 wt % sodium chloride (NaCl) electrolyte. Furthermore, this approach ensures uniform Al stripping behavior and manages the generation of aluminum hydroxide at the electrode/ electrolyte interface. With respect to the rampant precipitates in pH-neutral electrolytes, the PAM sol assists in facilitating the stable dispersion of aluminum hydroxide (Al(OH) 3 ) and curtailing the excessive buildup of precipitates, thereby prolonging the battery's operational life. Consequently, the pH-neutral AABs using the PAM sol electrolyte attain a remarkable specific capacity of 2312 mAh g −1 , alongside an extended durability of 73.3 h in cyclic on/off testing scenarios. This study offers a viable strategy for regulating interfacial reactions of Al anodes and boosting the long-term stability of AABs.

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“…Firstly, aluminum is one of the most abundant elements in the Earth's crust, making it an attractive and sustainable choice for largescale energy storage applications. [51][52][53][54] Secondly, aluminum has a higher energy density than zinc and iron, potentially surpassing existing metal-air batteries in specic energy and power (comparison of different metal anodes and metal-air batteries shown in Fig. 1 and Table 1, respectively).…”

Section: Ambesh Dixitmentioning

confidence: 99%