Enlargement of surface area of Al by electrochemical insertion and deinsertion of Li

Nishio, Kazuyuki; Yanagishita, Takashi; Yoshida, Masahiro; Hayakawa, Tomohiro; Masuda, Hideki

doi:10.1016/j.elecom.2015.06.017

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…Instead, CV scan rates (Figure S1a) and electrode forms (Figure S1b) should play a more important role here. Also, this particular CV shape is constantly observed by other studies [12,15] . Correspondingly, the two wide plateaus observed in the GCD curves shown in Figure 1d–f are located at ∼0.26 V (lithiation) and ∼0.48 V (delithiation) vs. Li/Li + , regardless of the cell type.…”

Section: Resultssupporting

confidence: 82%

“…Also, this particular CV shape is constantly observed by other studies. [12,15] Correspondingly, the two wide plateaus observed in the GCD curves shown in Figure 1d-f are located at~0.26 V (lithiation) and~0.48 V (delithiation) vs. Li/Li + , regardless of the cell type. Nevertheless, poor coulombic efficiency is always one of the major issues for Al-based anodes.…”

Section: Resultsmentioning

confidence: 80%

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Exploring the Reversibility of Phase Transformations in Aluminum Anodes through Operando Light Microscopy and Stress Analysis

et al. 2020

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Aluminum is well-known to possess attractive properties for possible use as an anode material in Li-ion batteries (LIBs), but effort is still needed to understand how and why it degrades. Herein, investigations of the delithiation and the re-lithiation processes in Al thin films using an established operando light microscopic platform are pursued. Operando videos highlight that the extraction of Li from the β phase (LiAl) is accompanied by fracture and crack formation leading to the detachment of the α phase (Al) from the rest of the electrode. The evolution of mechanical stress in Al thin film electrodes is tracked and shows severe stress asymmetry as phase transformations progress. Combining with the observations from light and electron microscopy, the mechanical stress during dealloying can be explained by Li solubility with the β phase, formation of cracks and of a highly porous Al nanostructure. Although the results pave a difficult path for utilization of the Al/LiAl/Al (α/β/α) phase transformations in future LIBs, they also suggest excellent opportunities when structural changes can be prevented, which otherwise impact the stability of Al-based electrodes.

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Section: Resultssupporting

confidence: 82%

Section: Resultsmentioning

confidence: 80%

Exploring the Reversibility of Phase Transformations in Aluminum Anodes through Operando Light Microscopy and Stress Analysis

et al. 2020

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“…Since it is well-known 1,2,8,22,23 that alloy forming electrode materials become amorphous during cycling, we ascribe the initial capacity increase to electrode roughening effects in agreement with recent results for aluminium electrodes. 13,24 To study the origin of the capacity loss, the lithium content of the tin electrodes after different numbers of cycles were determined (in their oxidized state) using ICP-AES as described in Section S1 in the ESI. † It was found that the lithium content in the electrodes increased linearly with the cycle number during 120 cycles (see Fig.…”

Section: Broader Contextmentioning

confidence: 99%

Lithium trapping in alloy forming electrodes and current collectors for lithium based batteries

Rehnlund

Lindgren

Böhme

et al. 2017

Energy Environ. Sci.

170

206

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Significant capacity losses are generally seen for batteries containing high-capacity lithium alloy forming anode materials such as silicon, tin and aluminium. These losses are generally ascribed to a combination of volume expansion effects and irreversible electrolyte reduction reactions. Here, it is shown, based on e.g. elemental analyses of cycled electrodes, that the capacity losses for tin nanorod and silicon composite electrodes in fact involve diffusion controlled trapping of lithium in the electrodes. While an analogous effect is also demonstrated for copper, nickel and titanium current collectors, boron-doped diamond is shown to function as an effective lithium diffusion barrier. The present findings indicate that the durability of lithium based batteries can be improved significantly via proper electrode design or regeneration of the used electrodes. © The Royal Society of Chemistry 2017

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Porous Nanostructured Materials

Péter

2021

Monographs in Electrochemistry

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Enlargement of surface area of Al by electrochemical insertion and deinsertion of Li

Cited by 3 publications

References 12 publications

Exploring the Reversibility of Phase Transformations in Aluminum Anodes through Operando Light Microscopy and Stress Analysis

Exploring the Reversibility of Phase Transformations in Aluminum Anodes through Operando Light Microscopy and Stress Analysis

Lithium trapping in alloy forming electrodes and current collectors for lithium based batteries

Porous Nanostructured Materials

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