Stress evolution in lithium metal electrodes

Cho, Jung Hwi; Xiao, Xingcheng; Guo, Kai; Liu, Yuanpeng; Gao, Huajian; Sheldon, Brian W.

doi:10.1016/j.ensm.2019.08.008

Cited by 45 publications

(57 citation statements)

References 45 publications

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“…Cho et al . (2020) demonstrated that stress in electrodeposited Li is caused by the interaction with the SEI layer, and Yoon et al . (2018) showed that SEI films on Li can exhibit compressive stress.…”

Section: Resultsmentioning

confidence: 99%

“…(2018), Kushima et al (2017), and Cho et al . (2020). The XRD technique demonstrated herein to detect residual strain in electrodeposited Li metal enables further study to understand the conditions that lead to residual strain in Li anodes.…”

Section: Resultsmentioning

confidence: 99%

“…Cho et al . (2020) showed that the stress in Li films is caused by the interaction of the Li metal with SEI layers, and stress in SEI films has been demonstrated by Yoon et al . (2018).…”

Section: Introductionmentioning

confidence: 89%

“…Cho et al . (2020) demonstrated that stress evolution occurs in electroplated Li metal films as well. Wang et al .…”

Section: Introductionmentioning

confidence: 99%

“…(2018), Kushima et al (2017), and Cho et al . (2020) all suggest that residual stress in Li films is likely to affect lithium morphology and may exacerbate dendrite growth. Therefore, understanding the conditions that lead to residual stress in Li metal anodes may be the key to understanding and preventing dendrites.…”

Section: Introductionmentioning

confidence: 99%

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Use of a Be-dome holder for texture and strain characterization of Li metal thin films via sin²(ψ) methodology

et al. 2020

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Residual strain in electrodeposited Li films may affect safety and performance in Li metal battery anodes, so it is important to understand how to detect residual strain in electrodeposited Li and the conditions under which it arises. To explore this Li films, electrodeposited onto Cu metal substrates, were prepared under an applied pressure of either 10 or 1000 kPa and subsequently tested for the presence or absence of residual strain via sin2(ψ) analysis. X-ray diffraction (XRD) analysis of Li films required preparation and examination within an inert environment; hence, a Be-dome sample holder was employed during XRD characterization. Results show that the Li film grown under 1000 kPa displayed a detectable presence of in-plane compressive strain (−0.066%), whereas the Li film grown under 10 kPa displayed no detectable in-plane strain. The underlying Cu substrate revealed an in-plane residual strain near zero. Texture analysis via pole figure determination was also performed for both Li and Cu and revealed a mild fiber texture for Li metal and a strong bi-axial texture of the Cu substrate. Experimental details concerning sample preparation, alignment, and analysis of the particularly air-sensitive Li films have also been detailed. This work shows that Li metal exhibits residual strain when electrodeposited under compressive stress and that XRD can be used to quantify that strain.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Cho et al . (2020) showed that the stress in Li films is caused by the interaction of the Li metal with SEI layers, and stress in SEI films has been demonstrated by Yoon et al . (2018).…”

Section: Introductionmentioning

confidence: 89%

“…Cho et al . (2020) demonstrated that stress evolution occurs in electroplated Li metal films as well. Wang et al .…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Use of a Be-dome holder for texture and strain characterization of Li metal thin films via sin²(ψ) methodology

et al. 2020

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A Semi‐Liquid Electrode toward Stable Zn Powder Anode

Liu

Zhou

et al. 2022

Adv Funct Materials

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Zn powder anode possesses great versatility compared to the Zn foil counterpart, but the rough surface with a high surface area aggravates the corrosion and dendrite growth. Herein, a dendrite‐free and anti‐corrosive semi‐liquid Zn anode (SLA) is successfully fabricated based on Zn powder and a thickening agent. Benefiting from the rheological property, the unique anode effectively releases the stress induced by Zn plating, especially under high‐current densities. Meanwhile, the dual‐conductive medium, i.e., ionic and electronic, homogenizes the ion flux and allows the stripping/plating to occur within the entire anode. In a symmetric cell, the SLA anode exhibits stable electrochemical behavior with a prolonged lifespan at the current density of 5 mA cm−2/10 mA cm−2 under the capacity of 5 mAh cm−2/10 mAh cm−2. Improved durability of more than 5000 cycles is endowed when assembling an SLA anode with a vanadium‐based cathode. This study provides an electrode rheology‐based approach to overcome the stability challenge of powder anode for scale‐up manufacturing.

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Probing the Mechanically Stable Solid Electrolyte Interphase and the Implications in Design Strategies

Gao

Zhang

2023

Advanced Materials

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The inevitable volume expansion of secondary battery anodes during cycling imposes forces on the solid electrolyte interphase (SEI). The battery performance is closely related to the capability of SEI to maintain intact under the cyclic loading conditions, which basically boils down to the mechanical properties of SEI. The volatile and complex nature of SEI as well as its nanoscale thickness and environmental sensitivity make the interpretation of its mechanical behavior many roadblocks. Widely varied approaches are adopted to investigate the mechanical properties of SEI, and diverse opinions are generated. The lack of consensus at both technical and theoretical levels has hindered the development of effective design strategies to maximize the mechanical stability of SEIs. Here, the essential and desirable mechanical properties of SEI, the available mechanical characterization methods, and important issues meriting attention for higher test accuracy are outlined. Previous attempts to optimize battery performance by tuning SEI mechanical properties are also scrutinized, inconsistencies in these efforts are elucidated, and the underlying causes are explored. Finally, a set of research protocols is proposed to accelerate the achievement of superior battery cycling performance by improving the mechanical stability of SEI.

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Stress evolution in lithium metal electrodes

Cited by 45 publications

References 45 publications

Use of a Be-dome holder for texture and strain characterization of Li metal thin films via sin²(ψ) methodology

Use of a Be-dome holder for texture and strain characterization of Li metal thin films via sin²(ψ) methodology

A Semi‐Liquid Electrode toward Stable Zn Powder Anode

Probing the Mechanically Stable Solid Electrolyte Interphase and the Implications in Design Strategies

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Stress evolution in lithium metal electrodes

Cited by 45 publications

References 45 publications

Use of a Be-dome holder for texture and strain characterization of Li metal thin films via sin2(ψ) methodology

Use of a Be-dome holder for texture and strain characterization of Li metal thin films via sin2(ψ) methodology

A Semi‐Liquid Electrode toward Stable Zn Powder Anode

Probing the Mechanically Stable Solid Electrolyte Interphase and the Implications in Design Strategies

Contact Info

Product

Resources

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Use of a Be-dome holder for texture and strain characterization of Li metal thin films via sin²(ψ) methodology

Use of a Be-dome holder for texture and strain characterization of Li metal thin films via sin²(ψ) methodology