Amorphous silicon thin films as a high capacity anodes for Li-ion batteries in ionic liquid electrolytes

Baranchugov, V.; Markevich, Elena; Pollak, Elad; Salitra, Gregory; Aurbach, Doron

doi:10.1016/j.elecom.2006.11.014

Cited by 284 publications

(201 citation statements)

References 34 publications

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“…The simple fabrication, scalability, low volume expansion and structural robustness of our previously reported nSi-cPAN architecture 19 make it an ideal candidate to merge with a suitable electrolyte system. In pursuit of a stable Si-electrolyte interface, the nSi-cPAN composite was cycled under galvanostatic conditions in RTILs comprising cation-anion combinations known for their cathodic stabilities against various negative electrode materials [29][30][31]36,[40][41][42] . The cycling performances of the Si-based electrode in RTIL solutions, including PYR 13 FSI (1.2 M LiFSI), PYR 13 TFSI (0.6 M LiTFSI) and EMIMFSI (1.2 M LiFSI), were directly compared with the electrode performance in the commercial EC/DEC (1 M LiPF 6 ) electrolyte.…”

Section: Resultsmentioning

confidence: 99%

“…In spite of these efforts, the CEs achieved throughout cycling are still insufficient for a long-lasting Si-based full-cell 31,[33][34][35] or the methods employed to manufacture the full-cells introduce large excesses of Li þ (4200%) into the system that serve to counterbalance the cell efficiency losses over long-term cycling [36][37][38] . In the effort to design next-generation electrolyte materials, room temperature ionic liquids (RTILs or ILs) are of particular interest due to their low volatilities, negligible vapour pressures, thermal stabilities, high-voltage stability windows and sufficient ionic conductivities 39 .…”

mentioning

confidence: 99%

“…While the compatibility of ILs with such materials has been proven, a clear understanding of their electrochemical properties and interfacial chemistries has not yet been developed. Moreover, relatively little work has been dedicated to the study of the compatibility between RTIL electrolytes and Si-based nanocomposite electrodes, with all published work in this field, to date, investigating Si-RTIL systems in thin film type electrodes [29][30][31] .…”

mentioning

confidence: 99%

“…Alternative electrolyte compositions [28][29][30][31] and active material surface treatments 32 have been studied in the effort to enhance SEI formation on high-capacity anode materials and improve half-cell CEs. In spite of these efforts, the CEs achieved throughout cycling are still insufficient for a long-lasting Si-based full-cell 31,[33][34][35] or the methods employed to manufacture the full-cells introduce large excesses of Li þ (4200%) into the system that serve to counterbalance the cell efficiency losses over long-term cycling [36][37][38] .…”

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Stable silicon-ionic liquid interface for next-generation lithium-ion batteries

et al. 2015

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We are currently in the midst of a race to discover and develop new battery materials capable of providing high energy-density at low cost. By combining a high-performance Si electrode architecture with a room temperature ionic liquid electrolyte, here we demonstrate a highly energy-dense lithium-ion cell with an impressively long cycling life, maintaining over 75% capacity after 500 cycles. Such high performance is enabled by a stable half-cell coulombic efficiency of 99.97%, averaged over the first 200 cycles. Equally as significant, our detailed characterization elucidates the previously convoluted mechanisms of the solid-electrolyte interphase on Si electrodes. We provide a theoretical simulation to model the interface and microstructural-compositional analyses that confirm our theoretical predictions and allow us to visualize the precise location and constitution of various interfacial components. This work provides new science related to the interfacial stability of Si-based materials while granting positive exposure to ionic liquid electrochemistry.

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Section: Resultsmentioning

confidence: 99%

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Stable silicon-ionic liquid interface for next-generation lithium-ion batteries

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“…In the case of the primary battery, metallic lithium may be used due to its high specific energy. ] ionic liquid electrolyte showed a capacity of the order of 3,000 mAh g −1 , with a small decrease in performance during 35 cycles [60].…”

Section: Sphericalmentioning

confidence: 99%

Precipitated silica as filler for polymer electrolyte based on poly(acrylonitrile)/sulfolane

Kurc

2014

J Solid State Electrochem

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The aim of the present work was to perform a preliminary study of the physicochemical properties of hybrid organic-inorganic gel electrolytes for Li-ion batteries based on the PAN/TMS -poly(acrylonitrile)/sulfolane -polymeric matrix and surface-modified precipitated silicas. Modifications were done by means of the so-called dry method using silane U-511 3-methacryloxypropyltrimetoxysilane. Scanning electron microscopy (SEM), noninvasive back scattering method (NIBS), specific surface area (BET), the degree of modification of the silica fillers-Fourier-transform infrared spectroscopy (FT-IR), impedance analysis, and charging/ discharging were carried out. It is found that the silica fillers were homogeneously dispersed in the polymeric matrix, which enhanced conductivity and electrochemical stability of porous polymer electrolytes. Applicability of the prepared gel electrolytes for the Li-ion technology was estimated on the basis of specific conductivity measurements. It was shown that modification of the silica surface by the silane causes an increase in the gel-specific conductivity by about 2 orders of magnitude as compared to gel with unmodified silica.

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Silicon‐Based Anodes for Advanced Lithium‐Ion Batteries

Song

Zhang

2019

Encyclopedia of Inorganic and Bioinorganic Chemistry

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The society's growing demand on long‐range electrical vehicles and long‐life consumer electronics put urgent requirement on the development of advanced lithium‐ion batteries (LIBs) of high energy and low cost. Si, with top abundance and highest theoretical capacity to lithium, is expected to bump the LIB's energy density to above 300 Wh kg −1 at a relatively low cost. Over the past 2 decades, tremendous effort has been made in bringing Si‐based anode materials to the battery market. In this book article, we review the progress from three fundamental aspects: (i) Si nanostructure design; (ii) binder study; and (iii) electrolyte optimization and interphase engineering. We address the practical aspects of Si‐based anode materials and remaining challenges with a special focus on the full cell configuration. We hope the short walkthrough of the Si technology will help the readers have a quick grasp of the efforts made in improving the performance of Si‐based anodes and appreciate the outcomes of the fundamental research brought to the development of practical LIBs.

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Amorphous silicon thin films as a high capacity anodes for Li-ion batteries in ionic liquid electrolytes

Cited by 284 publications

References 34 publications

Stable silicon-ionic liquid interface for next-generation lithium-ion batteries

Stable silicon-ionic liquid interface for next-generation lithium-ion batteries

Precipitated silica as filler for polymer electrolyte based on poly(acrylonitrile)/sulfolane

Silicon‐Based Anodes for Advanced Lithium‐Ion Batteries

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