Stress evolution during cycling of alloy-anode solid-state batteries

Han, Sang Yun; Lee, Chanhee; Lewis, John A.; Yeh, David; Liu, Yuhgene; Lee, Hyun‐Wook; McDowell, Matthew T.

doi:10.1016/j.joule.2021.07.002

Cited by 111 publications

(99 citation statements)

References 55 publications

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“…This finding is consistent with the recent operando synchrotron radiation X-ray tomographic microscopy report, which indicates the higher stress contribution is coming from the axial axis of the cell that is equivalent to the fiber transversal axis 54 . Moreover, we noted that the measured stress was nearly independent of the applied stack pressure in agreement with previous work 16 while it enables to reduce the cell polarization, hence favoring the charge transfer (Fig. 6b vs.…”

Section: Resultssupporting

confidence: 91%

“…In the same line of thought, we can also explain the increase in Δσ starting at a higher voltage value for micro particles than for nanoparticles (Fig. 2d , e), owing to their copious cracking that rapidly fills out the porosity, in agreement with recent stress measurements on silicon electrode via outside force sensor 16 . Lastly, based on this porosity argument, the nearly linear variation of Δ λ B upon lithiation in InLi x || LTO (see Fig.…”

Section: Resultssupporting

confidence: 91%

“…Worth also recalling that the optical bending cantilever technique for determining stresses associated with phase transitions in insertion electrode materials was reported, but mainly applicable to thin-film electrodes on silicon substrate 13 , 14 . On the other hand, scientists have managed to understand and quantify Li-driven volume and stress changes in ASSBs by successfully placing force sensors in the axial direction of the battery providing new insights on the chemo-mechanical aspects at the cell level 10 , 15 , 16 . However, this approach presents two main limitations: 1- only the axial component of the stress can be monitored and 2- only information at the device level is provided, as the sensor is placed outside the cell and thus no decoupling of local phenomena taking place at different electrodes is possible.…”

Section: Introductionmentioning

confidence: 99%

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Optical sensors for operando stress monitoring in lithium-based batteries containing solid-state or liquid electrolytes

et al. 2022

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The study of chemo-mechanical stress taking place in the electrodes of a battery during cycling is of paramount importance to extend the lifetime of the device. This aspect is particularly relevant for all-solid-state batteries where the stress can be transmitted across the device due to the stiff nature of the solid electrolyte. However, stress monitoring generally relies on sensors located outside of the battery, therefore providing information only at device level and failing to detect local changes. Here, we report a method to investigate the chemo-mechanical stress occurring at both positive and negative electrodes and at the electrode/electrolyte interface during battery operation. To such effect, optical fiber Bragg grating sensors were embedded inside coin and Swagelok cells containing either liquid or solid-state electrolyte. The optical signal was monitored during battery cycling, further translated into stress and correlated with the voltage profile. This work proposes an operando technique for stress monitoring with potential use in cell diagnosis and battery design.

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

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Optical sensors for operando stress monitoring in lithium-based batteries containing solid-state or liquid electrolytes

et al. 2022

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“…The challenges associated with contact loss during stripping and short-circuiting during plating of lithium metal have motivated the investigation of other high-capacity anode material candidates. Alloy anodes, such as silicon and tin, have long been studied for conventional Li-ion batteries but have only recently begun to be more widely investigated for solid-state batteries. − While alloy anodes offer the potential for high energy density and significantly reduce the risk of lithium dendrite growth, they present different mechanistic challenges to fast charging. In particular, alloy anodes require solid-state diffusion over the thickness of the electrode, which can be a kinetically limited process regardless of whether the solid-state electrolyte is mixed with the alloy material.…”

Section: Challenges For Fast Charge Of Solid-state Batteriesmentioning

confidence: 99%

Challenges and Opportunities for Fast Charging of Solid-State Lithium Metal Batteries

et al. 2021

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In this Perspective, we assess the promise and challenges for solid-state batteries (SSBs) to operate under fast-charge conditions (e.g., <10 min charge). We present the limitations of state-of-the-art lithium-ion batteries (LIBs) and liquid-based lithium metal batteries in context, and highlight the distinct advantages offered by SSBs with respect to rate performance, thermal safety, and cell architecture. Despite the promising fast-charge attributes of SSBs, we must overcome fundamental challenges pertaining to electro-chemo-mechanics interaction, interface evolution, and transport-kinetics dichotomy to realize their implementation. We describe the mechanistic implications of critical features including plating-stripping crosstalk, metallic filament growth, cathode microstructure, and interphase formation on the fast-charge performance of SSBs. Toward achieving the eventual goal of fast-charge in SSBs, we highlight both intrinsic (e.g., interface design, transport properties) and extrinsic (e.g., temperature, pressure) design factors that can favorably modulate the mechanistic coupling and cross-correlations. Finally, a list of key research questions is identified that need to be answered to gain a deeper understanding of the fast-charge capabilities and requirements of SSBs.

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“…[ 9–15 ] However, chemo‐mechanical phenomena are accentuated at SE‐electrode interfaces, and the impact of these effects on all solid‐state batteries has been addressed and emphasized only recently. [ 1,4,5,7,8,16–23 ]…”

Section: Introductionmentioning

confidence: 99%

An Investigation of Chemo‐Mechanical Phenomena and Li Metal Penetration in All‐Solid‐State Lithium Metal Batteries Using In Situ Optical Curvature Measurements

Cho

Choi

Chakravarthy

et al. 2022

Advanced Energy Materials

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Solid‐electrolytes (SEs) can provide a pathway to increase energy‐density in lithium metal batteries. However, lithium metal penetration through garnet based LLZO solid electrolytes has been identified as a critical failure process. This phenomenon is related to chemo‐mechanical processes which are difficult to probe. In particular, characterizing the dynamic mechanical deformations that occur in electrode‐SE structures is very challenging. This study reports in situ curvature measurements that are thus designed to probe chemo‐mechanical phenomena that occur during lithium plating. The novel experimental cell configuration created for this work shows that pressure builds up in the Li metal during plating, up until the point where short circuits occur. The resulting data are analyzed with a detailed finite element model (FEM) to quantitatively evaluate stress evolution. The results show that Li metal plating within a surface flaw can produce stress build‐up prior to short‐circuiting. The combined results from both the experiments and the FEM suggest that it is critical to minimize surface defects and flaws during the manufacturing processes.

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Stress evolution during cycling of alloy-anode solid-state batteries

Cited by 111 publications

References 55 publications

Optical sensors for operando stress monitoring in lithium-based batteries containing solid-state or liquid electrolytes

Optical sensors for operando stress monitoring in lithium-based batteries containing solid-state or liquid electrolytes

Challenges and Opportunities for Fast Charging of Solid-State Lithium Metal Batteries

An Investigation of Chemo‐Mechanical Phenomena and Li Metal Penetration in All‐Solid‐State Lithium Metal Batteries Using In Situ Optical Curvature Measurements

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