In Situ AFM Imaging of Solid Electrolyte Interfaces on HOPG with Ethylene Carbonate and Fluoroethylene Carbonate-Based Electrolytes

Shen, Cai; Wang, Shuwei; Jin, Yan; Han, Wei‐Qiang

doi:10.1021/acsami.5b08238

Cited by 125 publications

(109 citation statements)

References 54 publications

(79 reference statements)

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“…Upon delithiation the SEI shrunk to its prelithiation thickness and the SLD increased to 2.5 ± 0.1. This swelling and contracting of the SEI layer thickness is consistent with the “breathing” reported for silicon anodes measured by previous NR studies as well as XPS, TOF-SIMS, and atomic force microscopy studies 31, 34, 42, 43, 52, 54 . We should note that in the case of the FEC, the thickness of the SEI “breathes” in the opposite direction of the non-FEC case.…”

Section: Resultssupporting

confidence: 90%

“…Indeed, at 0.6 V there is a small 8 Å increase in Si thickness (versus as-prepared Si) and a corresponding decrease in the Si layer SLD from 2.0 ± 0.1 to a calculated SLD of 1.93 consistent with Li entering the Si electrode causing the layer to swell and a decrease in SLD due to the negative SLD of Li (−0.87). At 0.4 V the thickness increased by 24 Å and the SLD decreased further to 1.85, again consistent with the extent of lithiation and the expected swelling of Li:Si alloys reported by Chevrier, Figure S3 52, 53 .…”

Section: Resultssupporting

confidence: 87%

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Determination of the Solid Electrolyte Interphase Structure Grown on a Silicon Electrode Using a Fluoroethylene Carbonate Additive

Veith

Doucet

Sacci

et al. 2017

Sci Rep

179

170

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In this work we explore how an electrolyte additive (fluorinated ethylene carbonate – FEC) mediates the thickness and composition of the solid electrolyte interphase formed over a silicon anode in situ as a function of state-of-charge and cycle. We show the FEC condenses on the surface at open circuit voltage then is reduced to C-O containing polymeric species around 0.9 V (vs. Li/Li+). The resulting film is about 50 Å thick. Upon lithiation the SEI thickens to 70 Å and becomes more organic-like. With delithiation the SEI thins by 13 Å and becomes more inorganic in nature, consistent with the formation of LiF. This thickening/thinning is reversible with cycling and shows the SEI is a dynamic structure. We compare the SEI chemistry and thickness to 280 Å thick SEI layers produced without FEC and provide a mechanism for SEI formation using FEC additives.

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 87%

Determination of the Solid Electrolyte Interphase Structure Grown on a Silicon Electrode Using a Fluoroethylene Carbonate Additive

Veith

Doucet

Sacci

et al. 2017

Sci Rep

179

170

View full text Add to dashboard Cite

show abstract

“…Shen et al. also use in situ AFM combine with ex situ X‐ray photoelectron spectroscopy (XPS), showing that the dense and hard SEI formed in LiPF 6 /FEC/DMC is mainly composed of LiF . Cresce et al.…”

Section: Negative Electrode Materials In Libsmentioning

confidence: 99%

Advances in Understanding Materials for Rechargeable Lithium Batteries by Atomic Force Microscopy

Wang

Liu

Zhao

et al. 2018

Energy & Environ Materials

Self Cite

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The development of advanced lithium batteries represents a major technological challenge for the new century. Understanding the fundamental electrode degradation mechanisms is important for battery performance improvements. The complex electrochemical processes inside a working battery are being explored to a limited extent. Various advanced material characterization techniques have been used to monitor dynamic conditions for optimizing battery materials. State‐of‐the‐art atomic force microscopy methods have been applied to energy storage systems, specifically lithium‐ion batteries. Atomic force microscopy is an ideal tool to provide localized morphological, chemical, and physical information at nanoscale for the in‐depth understanding of the electrochemical processes, reaction mechanisms, and degradation of battery materials. Here, we review recent progress in the development and application of atomic force microscopy for high‐performance lithium‐ion batteries. We discuss atomic force microscopy as an analytical tool to help researchers understand graphite, silicon, layered metal oxides, and other representative electrode materials. We summarize the importance of atomic force microscopy technique in studying the next‐generation Li–S and Li–O2 batteries. We also highlight some of the remaining challenges and possible solutions for future development.

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“…The cathodic peak around 0.1 V is attributed to the formation of Li‐Si alloy. While a broad cathodic peak in the range of 0.5–1.0 V (vs Li/Li + ) is observed for sample “before acid‐washing,” which is due to the irreversible formation of SEI film and the electrolyte decomposition on the surface . This peak appears in all cycles, demonstrating the sample “before acid‐washing” with a worse reversible electrochemical capability.…”

Section: Resultsmentioning

confidence: 96%

In Situ‐Derived Porous SiO₂/Carbon Nanocomposite from Lichens for Lithium‐Ion Batteries

Liu

Xing

et al. 2019

Energy Tech

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A 3D SiO2/carbon nanocomposite is fabricated from lichens successfully. By acid‐washing, nanoporous structure can be generated by removing inorganic compounds. Comparing with the SiO2/carbon nanocomposite before acid‐washing, the one after acid‐washing displays decreased electrochemical reaction resistance and better electrochemical performance as anode materials for the lithium‐ion battery. At a current density of 100 mA g−1, the hierarchical porous SiO2/carbon nanocomposite after acid‐washing shows excellent cycle stability. A high reversible capacity of 583.3 mAh g−1 can still be obtained after 100 cycles, which is much higher than the theoretical capacity of graphite.

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In Situ AFM Imaging of Solid Electrolyte Interfaces on HOPG with Ethylene Carbonate and Fluoroethylene Carbonate-Based Electrolytes

Cited by 125 publications

References 54 publications

Determination of the Solid Electrolyte Interphase Structure Grown on a Silicon Electrode Using a Fluoroethylene Carbonate Additive

Determination of the Solid Electrolyte Interphase Structure Grown on a Silicon Electrode Using a Fluoroethylene Carbonate Additive

Advances in Understanding Materials for Rechargeable Lithium Batteries by Atomic Force Microscopy

In Situ‐Derived Porous SiO₂/Carbon Nanocomposite from Lichens for Lithium‐Ion Batteries

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In Situ AFM Imaging of Solid Electrolyte Interfaces on HOPG with Ethylene Carbonate and Fluoroethylene Carbonate-Based Electrolytes

Cited by 125 publications

References 54 publications

Determination of the Solid Electrolyte Interphase Structure Grown on a Silicon Electrode Using a Fluoroethylene Carbonate Additive

Determination of the Solid Electrolyte Interphase Structure Grown on a Silicon Electrode Using a Fluoroethylene Carbonate Additive

Advances in Understanding Materials for Rechargeable Lithium Batteries by Atomic Force Microscopy

In Situ‐Derived Porous SiO2/Carbon Nanocomposite from Lichens for Lithium‐Ion Batteries

Contact Info

Product

Resources

About

In Situ‐Derived Porous SiO₂/Carbon Nanocomposite from Lichens for Lithium‐Ion Batteries