Atomic to Nanoscale Origin of Vinylene Carbonate Enhanced Cycling Stability of Lithium Metal Anode Revealed by Cryo-Transmission Electron Microscopy

Xu, Yaobin; Wu, Haiping; Yang, He; Chen, Qingsong; Zhang, Ji‐Guang; Xu, Wu; Wang, Chongmin

doi:10.1021/acs.nanolett.9b04111

Cited by 117 publications

(100 citation statements)

References 42 publications

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“…[ 25 ] As confirmed in different literature reports, the SEI is predominantly or even exclusively comprised of amorphous phase, regardless of the electrolyte in the batteries. [ 26 ] In addition, the crystalline microphases do not concentrate at the surface of metallic Li. In some cases, the crystalline microphases distribute randomly in SEI, whereas in other cases, these microphases concentrate on the outer layer.…”

Section: Chemical Compositions and Structures Of Solid Electrolyte Inmentioning

confidence: 99%

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Recent Progress in Understanding Solid Electrolyte Interphase on Lithium Metal Anodes

Jia

Wang

et al. 2020

Advanced Energy Materials

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Lithium metal batteries (LMBs) are one of the most promising candidates for next‐generation high‐energy‐density rechargeable batteries. Solid electrolyte interphase (SEI) on Li metal anodes plays a significant role in influencing the Li deposition morphology and the cycle life of LMBs. However, a thorough understanding on the mechanisms of SEI formation and evolution is still inadequate. In this review, the progress in understanding structures, properties, and influencing factors of SEI, as well as efficient strategies of tailoring SEI are focused upon. First, the compositions, models, and recent progress in characterizing atomic structures of SEI are summarized. Second, the properties of SEI, including electronic conduction, ionic conduction, stability, and mechanical properties are elucidated. Structures and properties of SEI are greatly affected by multiple factors, thus interactions between these factors and SEI are systematically discussed. Correlations of SEI with Li deposition morphology, rate capability, and cycle life are further summarized. Moreover, efficient strategies of tailoring SEI with desired properties, including in situ SEI and ex situ SEI, are also reviewed. Finally, future directions, including in‐operando techniques, multi‐modality approaches for characterization of SEI, and artificial intelligence assisted understanding of correlations between electrolyte components and SEI properties are proposed.

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Section: Chemical Compositions and Structures Of Solid Electrolyte Inmentioning

confidence: 99%

“…A monolithic SEI which was rich in inorganic species was reported very recently. [ 26b ] These inorganic compounds were distributed uniformly in an amorphous state in this SEI. This finding indicates that amorphous SEI indeed exists, but particular electrolyte is needed.…”

Section: Chemical Compositions and Structures Of Solid Electrolyte Inmentioning

confidence: 99%

Recent Progress in Understanding Solid Electrolyte Interphase on Lithium Metal Anodes

Jia

Wang

et al. 2020

Advanced Energy Materials

Self Cite

377

339

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“…Various electrolyte additives with higher HOMO and lower LUMO energies such as FEC, VC, KNO 3 , LiNO 3 , Li polysulfides (LiPS), or a mixture of them have been designed for Li metal anodes. [83,[134][135][136][137] FEC is an extensively used SEI-adjusting additive in anodes of LIBs (e.g., graphite anode), since it can preferentially form a stable and dense LiF-rich SEI and suppress the exfoliation of graphite. Li et al identified that addition of 10% FEC into standard carbonate-based electrolyte (EC/DEC) can change the structure of SEI on the surface of Li metal anode (from mosaic model to multilayer model) by employing cryo-EM technique.…”

Section: Dft Calculationmentioning

confidence: 99%

“…Similarly, Xu et al discovered that the composition and structure of both electrochemically deposited Li metal (EDLi) and SEI can be changed by adding VC into the electrolyte, thus affecting the electrochemical performance of Li metal anodes (Figure 16a). [134] Moreover, adding a mixture of different additives has also been developed to stabilize the electrode/ electrode interface. Zhang's group.…”

Section: Dft Calculationmentioning

confidence: 99%

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Interface Engineering for Lithium Metal Anodes in Liquid Electrolyte

Zhai

Liu

et al. 2020

Advanced Energy Materials

315

194

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Interfacial chemistry between lithium metal anodes and electrolytes plays a vital role in regulating the Li plating/stripping behavior and improving the cycling performance of Li metal batteries. Constructing a stable solid electrolyte interphase (SEI) on Li metal anodes is now understood to be a requirement for progress in achieving feasible Li‐metal batteries. Recently, the application of novel analytical tools has led to a clearer understanding of composition and the fine structure of the SEI. This further promoted the development of interface engineering for stable Li metal anodes. In this review, the SEI formation mechanism, conceptual models, and the nature of the SEI are briefly summarized. Recent progress in probing the atomic structure of the SEI and elucidating the fundamental effect of interfacial stability on battery performance are emphasized. Multiple factors including current density, mechanical strength, operating temperature, and structure/composition homogeneity that affect the interfacial properties are comprehensively discussed. Moreover, strategies for designing stable Li‐metal/electrolyte interfaces are also reviewed. Finally, new insights and future directions associated with Li‐metal anode interfaces are proposed to inspire more revolutionary solutions toward commercialization of Li metal batteries.

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