The structural and electrochemical study on the blended anode with graphite and silicon carbon nano composite in Li ion battery

Jung, Hae-Min; Kim, Kyoung Soo; Park, Sang-Eun; Park, Jung Hwan

doi:10.1016/j.electacta.2017.05.187

Cited by 13 publications

(5 citation statements)

References 14 publications

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“…Figure d shows the DCP of the graphite electrode with the potential range between 0.05 and 2 V (vs Li/Li + ) for the first cycle. Three distinctive peaks at around 0.20, 0.11, and 0.07 V (vs Li/Li + ) were observed in the DCP of the graphite electrode during lithium intercalation, and these values match well with the differential capacity plots peaks of graphite electrodes reported in earlier studies. ,, A cyclic voltammogram (CV) of the graphite electrode in SO 2 -based inorganic liquid electrolyte revealed findings similar to those in the DCP; lithium intercalation into the graphite within the range of 0.05–0.25 V (vs Li/Li + ) (Figure S6). Despite concerns about the electrochemical reduction of the LiAlCl 4 ·3SO 2 electrolyte at 2.7 V (vs Li/Li + ) on the graphite surface, the main electrochemical reaction was lithium intercalation into the graphite anode rather than electrolyte decomposition.…”

Section: Resultssupporting

confidence: 86%

Lithium-Ion Intercalation into Graphite in SO₂-Based Inorganic Electrolyte toward High-Rate-Capable and Safe Lithium-Ion Batteries

Kim

Jung

Song

et al. 2019

ACS Appl. Mater. Interfaces

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Herein, we have identified that lithium ions in an SO 2 -based inorganic electrolyte reversibly intercalate and deintercalate into/out of graphite electrode using ex situ X-ray diffraction and various electrochemical methods. X-ray photoelectron spectroscopy shows that the solid electrolyte interphase on the graphite electrode is mainly composed of inorganic compounds, such as LiCl and lithium sulfur-oxy compounds. Graphite electrode in SO 2 -based inorganic electrolyte has stable capacity retention up to 100 cycles and outstanding rate capability performance. This can be attributed to low interfacial impedance and high ionic conductivity of SO 2 -based inorganic electrolyte, which are superior to those of conventional organic electrolytes. Considering the remarkable rate capability and intrinsically nonflammable properties of the electrolyte, use of graphite and an SO 2 electrolyte will likely facilitate the development of advanced lithium-ion batteries.

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Section: Resultssupporting

confidence: 86%

Lithium-Ion Intercalation into Graphite in SO₂-Based Inorganic Electrolyte toward High-Rate-Capable and Safe Lithium-Ion Batteries

Kim

Jung

Song

et al. 2019

ACS Appl. Mater. Interfaces

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“…In general, to improve the energy density of LIBs, considering the large volume change of Si during cycling, a blended electrode consisting of Si-based anode material and graphite is preferred rather than using Si-based anode material only [36][37][38][39][40][41]. Fig.…”

Section: Resultsmentioning

confidence: 99%

Spherical Silicon/CNT/Carbon Composite Wrapped with Graphene as an Anode Material for Lithium-Ion Batteries

Shin

Choi

Park

et al. 2022

J. Electrochem. Sci. Technol

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The assembly of the micron-sized Si/CNT/carbon composite wrapped with graphene (SCG composite) is designed and synthesized via a spray drying process. The spherical SCG composite exhibits a high discharge capacity of 1789 mAh g -1 with an initial coulombic efficiency of 84 %. Moreover, the porous architecture of SCG composite is beneficial for enhancing cycling stability and rate capability. In practice, a blended electrode consisting of spherical SCG composite and natural graphite with a reversible capacity of ~500 mAh g -1 , shows a stable cycle performance with high cycling efficiencies (> 99.5%) during 100 cycles. These superior electrochemical performance are mainly attributed to the robust design and structural stability of the SCG composite during charge and discharge process. It appears that despite the fracture of micro-sized Si particles during repeated cycling, the electrical contact of Si particles can be maintained within the SCG composite by suppressing the direct contact of Si particles with electrolytes.

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“…The delithiation of the Si–Gr electrode occurred sequentially: Li was first lost from Gr and then lost from Si. An in situ XRD study of a mixed anode composed of graphite and Si–C nanocomposites has also been reported by Jung et al The structural changes in the carbon‐based component during early cycles are shown in Figure . As seen from the XRD images (Figure A), with an increase in Si–C nanocomposite contents in the mixed anode, the structural change of graphite into LiC 6 occurred late in the discharge stage and early in the charge stage.…”

Section: Applications Of Advanced Characterization Methods To Siliconmentioning

confidence: 99%

“…B‐b) Portion of capacities of LiC x (red) and LiSi y (black) calculated from ex situ NMR spectra of samples (9 wt% Si–C nanocomposites) in different states of discharge (SODs). Reproduced with permission . Copyright 2017, Elsevier.…”

Section: Applications Of Advanced Characterization Methods To Siliconmentioning

confidence: 99%

Recent Progress in Advanced Characterization Methods for Silicon‐Based Lithium‐Ion Batteries

Ma²,

Liu

et al. 2019

Small Methods

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With the remarkably large theoretical specific capacity of silicon (Si), Si‐based rechargeable lithium‐ion batteries (LIBs) have attracted great interest, as they are expected to meet the growing demand for large‐scale energy storage devices, electric vehicles, and portable electronic devices with high energy density. However, the Si‐based LIB faces great challenges due to the cyclic volume changes induced by Si, which lead to considerable capacity fading. To facilitate the use of high‐performance LIBs enabled by Si‐based anodes, understanding the fading mechanism is necessary. In this regard, various advanced characterization methods have been developed to reveal the fading mechanism and to develop a modification strategy associated with compositional and structural evolution. In this review, the general understanding of the fading mechanism and the technical specifications of Si‐based LIBs are discussed. The recent progress in advanced characterization methods for Si‐based LIBs is summarized with respect to the achievements in compositional and structural interpretation. Several possible future research directions for Si‐based LIBs and the expected development trends in relevant characterization methods are also discussed.

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The structural and electrochemical study on the blended anode with graphite and silicon carbon nano composite in Li ion battery

Cited by 13 publications

References 14 publications

Lithium-Ion Intercalation into Graphite in SO₂-Based Inorganic Electrolyte toward High-Rate-Capable and Safe Lithium-Ion Batteries

Lithium-Ion Intercalation into Graphite in SO₂-Based Inorganic Electrolyte toward High-Rate-Capable and Safe Lithium-Ion Batteries

Spherical Silicon/CNT/Carbon Composite Wrapped with Graphene as an Anode Material for Lithium-Ion Batteries

Recent Progress in Advanced Characterization Methods for Silicon‐Based Lithium‐Ion Batteries

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The structural and electrochemical study on the blended anode with graphite and silicon carbon nano composite in Li ion battery

Cited by 13 publications

References 14 publications

Lithium-Ion Intercalation into Graphite in SO2-Based Inorganic Electrolyte toward High-Rate-Capable and Safe Lithium-Ion Batteries

Lithium-Ion Intercalation into Graphite in SO2-Based Inorganic Electrolyte toward High-Rate-Capable and Safe Lithium-Ion Batteries

Spherical Silicon/CNT/Carbon Composite Wrapped with Graphene as an Anode Material for Lithium-Ion Batteries

Recent Progress in Advanced Characterization Methods for Silicon‐Based Lithium‐Ion Batteries

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Lithium-Ion Intercalation into Graphite in SO₂-Based Inorganic Electrolyte toward High-Rate-Capable and Safe Lithium-Ion Batteries

Lithium-Ion Intercalation into Graphite in SO₂-Based Inorganic Electrolyte toward High-Rate-Capable and Safe Lithium-Ion Batteries