Combination of solid polymer electrolytes and lithiophilic zinc for improved plating/stripping efficiency in anode-free lithium metal solid-state batteries

Bertoli, Luca; Bloch, Sophia; Andersson, Edvin; Magagnin, Luca; Brandell, Daniel; Mindemark, Jonas

doi:10.1016/j.electacta.2023.142874

Cited by 11 publications

(4 citation statements)

References 41 publications

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“…While these numbers remain to be improved for practical purposes, modifying the current collector appears to be a promising approach for improving the CE under low-pressure cycling conditions. For example, applying lithophilic metal layers onto the Cu current collectors can planarize the Li plating morphology and help improve the CE 31 However, CE values in this study by Bertoli et al remained <90%. Indeed, engineering the PE itself could also help to increase the CE.…”

Section: Resultscontrasting

confidence: 60%

Electroanalytical Exploration of Li Loss at the Solid Electrolyte-Anode Interface in Anode-Free Batteries with Polymer Electrolytes

Sahore,

Mayer,

Steinle

et al. 2024

J. Electrochem. Soc.

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Li loss during cycling at the solid electrolyte∣anode interface strongly determines the cycle life of anode-free solid-state batteries (SSBs). Here, this loss is probed electroanalytically for polymer electrolyte (PE)-based SSBs in anode-free coin cells with practical pressures. A wide range of parameters expected to impact the measured average coulombic efficiency (CE) were explored to estimate the expected range of performance. These factors include PE type, cycling profiles, current collector type, and the presence of a thin Li seed layer. Low CE values in the ∼50%–85% range are observed for all electrolytes and test conditions. Other than the electrolyte type, a strong dependence of the CE on the electrochemical cycling profile and the type of metallic current collector is observed. Compared to the anode-free setup, the presence of a thin (5 μm) Li seed layer did not improve the average CE for two out of three PEs, suggesting its presence to be a weak contributor in minimizing the Li loss. This work provides baseline data on the Li losses in low-pressure anode-free configuration cells with PEs.

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Section: Resultscontrasting

confidence: 60%

Electroanalytical Exploration of Li Loss at the Solid Electrolyte-Anode Interface in Anode-Free Batteries with Polymer Electrolytes

Sahore,

Mayer,

Steinle

et al. 2024

J. Electrochem. Soc.

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show abstract

“…It is a positive development that cell tests have become an integral part of SPE studies. Especially within the last decade the number of cell tests of SPE-based alkali-ion, [6] alkali-metal (e. g. Li, [29,34] Na, [6,35] K [9,13] ) and anode-less [36] battery configura- tions have increased sharply and has even moved beyond labscale testing. [37] As with liquid electrolytes, the choice of cell setup and cell construction have profound effects on cell performance and lead to very different results even when the same material is being investigated.…”

Section: The Cell Challenge: Reproducibility Comparability Materials ...mentioning

confidence: 99%

“…Incidentally, the commonly used Cu current collector at the negative electrode performs poorly, at least for Li-deposition, compared to 'lithiophilic' materials such as Zn, Ag or Au. [36] The Transference Number Challenge:…”

Section: The Cell Challenge: Reproducibility Comparability Materials ...mentioning

confidence: 99%

Moving Down Group 1: Analytical Challenges and Current Trends for Solid Polymer Electrolytes in Post‐Li Battery Applications

Jeschull

2024

ChemElectroChem

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The solid polymer electrolyte (SPE) field has traditionally struggled with sufficiently high cation conduction at room temperature. The reason for this is that ion transport is usually coupled to polymer chain mobility and as such is strongly temperature dependent. The diversification of battery technologies from Li‐ion into Na‐ and K‐ion batteries has revived efforts in the 80s and 90s to develop a broad conceptional understanding and to find overarching trends of the ion transport properties of SPEs based on Group 1 elements, Li+, Na+, K+, Rb+ and Cs+ (i. e. beyond Li). This development brings its own set of challenges, starting from additional constraints to measure heavier cations. With a clearer aim towards tangible battery applications, particularly electrochemical stability and interphase formation, and together with a rising sensibility of sustainability aspects, other parameters have gained more relevance and opened new vectors of research. The associated scientific challenges and recent developments of Group 1 based SPEs shall be reviewed.

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“…An innovative strategy of mixing zinc salt into a hybrid solid electrolyte film could build a lithophilic layer between CC and SE through the intrinsic high potential Zn element against Li versus standard hydrogen electrode (SHE) during the first charging cycle, which forms an inherent buffer layer for the following Li plating/stripping with stable performance. [162] Although the sputtered Au thin layer on CC couldn't resist the lithium dendrite growth leading to internal short, thermal treatment of the sputtered Au thin layer at 400 °C helped to transfer the Au thin layer into separately distributed Au clusters, which forms electrical contact between SE/CC and could prevent localized current concentration during cycling. [163] An outstanding achievement has been reported, where a 3D interconnected ionic-electronic composite of carbon paper filled with SE was prepared and served as CC, a high areal capacity (>8 mAh cm −2 ) and long cycle life (>5000 cycles) could be realized in AFSSBs.…”

Section: Other Inorganic Ses For Afssbsmentioning

confidence: 99%

Optimizing Current Collector Interfaces for Efficient “Anode‐Free” Lithium Metal Batteries

Molaiyan,

Abdollahifar,

Boz

et al. 2023

Adv Funct Materials

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Current lithium (Li)‐metal anodes are not sustainable for the mass production of future energy storage devices because they are inherently unsafe, expensive, and environmentally unfriendly. The anode‐free concept, in which a current collector (CC) is directly used as the host to plate Li‐metal, by using only the Li content coming from the positive electrode, could unlock the development of highly energy‐dense and low‐cost rechargeable batteries. Unfortunately, dead Li‐metal forms during cycling, leading to a progressive and fast capacity loss. Therefore, the optimization of the CC/electrolyte interface and modifications of CC designs are key to producing highly efficient anode‐free batteries with liquid and solid‐state electrolytes. Lithiophilicity and electronic conductivity must be tuned to optimize the plating process of Li‐metal. This review summarizes the recent progress and key findings in the CC design (e.g. 3D structures) and its interaction with electrolytes.

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Combination of solid polymer electrolytes and lithiophilic zinc for improved plating/stripping efficiency in anode-free lithium metal solid-state batteries

Cited by 11 publications

References 41 publications

Electroanalytical Exploration of Li Loss at the Solid Electrolyte-Anode Interface in Anode-Free Batteries with Polymer Electrolytes

Electroanalytical Exploration of Li Loss at the Solid Electrolyte-Anode Interface in Anode-Free Batteries with Polymer Electrolytes

Moving Down Group 1: Analytical Challenges and Current Trends for Solid Polymer Electrolytes in Post‐Li Battery Applications

Optimizing Current Collector Interfaces for Efficient “Anode‐Free” Lithium Metal Batteries

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