An aluminum – ionic liquid interface sustaining a durable Al-air battery

Gelman, Danny; Shvartsev, Boris; Wallwater, Itamar; Kozokaro, Shahaf; Fidelsky, Vicky; Sagy, Adi; Oz, Alon; Baltianski, Sioma; Tsur, Yoed; Ein‐Eli, Yair

doi:10.1016/j.jpowsour.2017.08.014

Cited by 50 publications

(33 citation statements)

References 47 publications

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“…Due to possessing properties such as high conductivity, low viscosity, wide electrochemical window, stability in air [18][19][20], and in particular the capability to dissolve native oxide films from surfaces (e.g. silicon [21] and aluminium [22]), EMIm(HF) 2.3 F electrolyte is favorable for application in metal-air batteries. The development of Si-air batteries with EMIm(HF) 2.3 F electrolyte started in 2009, when the proof of concept was established [23] and, subsequently, the discharge capacities up to 26.7 mAh from a cell with 0.5 cm 2 anode surface area were corroborated [13].…”

Section: Introductionmentioning

confidence: 99%

Analysis on discharge behavior and performance of As- and B-doped silicon anodes in non-aqueous Si–air batteries under pulsed discharge operation

et al. 2019

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Very high theoretical specific energies and abundant resource availability have emerged interest in primary Si-air batteries during the last decade. When operated with highly doped Si anodes and EMIm(HF) 2.3 F ionic liquid electrolyte, specific energies up to 1660 Wh kg Si −1 can be realized. Owing to their high-discharge voltage, the most investigated anode materials are ⟨100⟩ oriented highly As-doped Si wafers. As there is substantial OCV corrosion for these anodes, the most favorable mode of operation is continuous discharge. The objective of the present work is, therefore, to investigate the discharge behavior of cells with ⟨100⟩ As-doped Si anodes and to compare their performance to cells with ⟨100⟩ B-doped Si anodes under pulsed discharge conditions with current densities of 0.1 and 0.3 mA cm −2 . Nine cells for both anode materials were operated for 200 h each, whereby current pulse time related to total operating time ranging from zero (OCV) to one (continuous discharge), are considered. The corrosion and discharge behavior of the cells were analyzed and anode surface morphologies after discharge were characterized. The performance is evaluated in terms of specific energy, specific capacity, and anode mass conversion efficiency. While for high-current pulse time fractions, the specific energies are higher for cells with As-doped Si anodes, along with low-current pulse fractions the cells with B-doped Si anodes are more favorable. It is demonstrated, that calculations for the specific energy under pulsed discharge conditions based on only two measurements-the OCV and the continuous discharge-match very well with the experimental data.

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Section: Introductionmentioning

confidence: 99%

Analysis on discharge behavior and performance of As- and B-doped silicon anodes in non-aqueous Si–air batteries under pulsed discharge operation

et al. 2019

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“…Figure 4a displays the IR‐corrected polarization curves of the catalysts. The resistance for the IR‐correction was taken from EIS measurements, which were analyzed using the ISGP method [27–31] . Figure S12 shows the comparison of LSV curves of NiFeCo−N 2 −2 °C with and without IR correction.…”

Section: Resultsmentioning

confidence: 99%

Optimization of Ni−Co−Fe‐Based Catalysts for Oxygen Evolution Reaction by Surface and Relaxation Phenomena Analysis

et al. 2021

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Trimetallic double hydroxide NiFeCo−OH is prepared by coprecipitation, from which three different catalysts are fabricated by different heat treatments, all at 350 °C maximum temperature. Among the prepared catalysts, the one prepared at a heating and cooling rate of 2 °C min−1 in N2 atmosphere (designated NiFeCo−N2‐2 °C) displays the best catalytic properties after stability testing, exhibiting a high current density (9.06 mA cm−2 at 320 mV), low Tafel slope (72.9 mV dec−1), good stability (over 20 h), high turnover frequency (0.304 s−1), and high mass activity (46.52 A g−1 at 320 mV). Stability tests reveal that the hydroxide phase is less suitable for long‐term use than catalysts with an oxide phase. Two causes are identified for the loss of stability in the hydroxide phase: a) Modeling of the distribution function of relaxation times (DFRT) reveals the increase in resistance contributed by various relaxation processes; b) density functional theory (DFT) surface energy calculations reveal that the higher surface energy of the hydroxide‐phase catalyst impairs the stability. These findings represent a new strategy to optimize catalysts for water splitting.

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“…In the past decades, various methods have been carried out to further improve the performances of Al-air batteries, including anode alloying, [21][22][23][24] adding inhibitors, [25][26][27][28] employing nonaqueous [29][30][31][32] or gel electrolyte, 33,34 and the development of highly effective catalysts for oxygen reduction reaction (ORR). [35][36][37][38] Gel 39,40 and non-aqueous 31 electrolyte can reach lower self-corrosion rate but reduce power density by one or two orders.…”

Section: Introductionmentioning

confidence: 99%

Ultrahigh voltage and energy density aluminum‐air battery based on aqueous alkaline‐acid hybrid electrolyte

et al. 2020

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Thanks to the high theoretical capacity and energy density, abundant resource, low-cost, and environmental friendliness, aluminum-air battery (AAB) has attracted research interests driven by the promise for electricity generator. However, low operating voltage leads to low practical energy density, and restricting the applications of AAB. In this study, the concept of an ultrahigh voltage AAB based on aqueous alkaline-acid hybrid electrolyte is introduced and demonstrated. Meanwhile, the working mechanism is investigated. And the open-circuit voltage of the novel designed battery is 2.56 V, 29.9% higher than conventional alkaline AAB. Thanks to the fluid electrolyte, the decline in discharge voltage caused by the change in pH is overcome. And a high-energy density of 4591 mWh g Al −1 is achieved at a discharge voltage of around 2.08 V at 10 mA cm −2. These results provide a viable approach to improve the performance of Al-air battery.

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An aluminum – ionic liquid interface sustaining a durable Al-air battery

Cited by 50 publications

References 47 publications

Analysis on discharge behavior and performance of As- and B-doped silicon anodes in non-aqueous Si–air batteries under pulsed discharge operation

Analysis on discharge behavior and performance of As- and B-doped silicon anodes in non-aqueous Si–air batteries under pulsed discharge operation

Optimization of Ni−Co−Fe‐Based Catalysts for Oxygen Evolution Reaction by Surface and Relaxation Phenomena Analysis

Ultrahigh voltage and energy density aluminum‐air battery based on aqueous alkaline‐acid hybrid electrolyte

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