In situ Raman microscopy during discharge of a high capacity silicon–carbon composite Li-ion battery negative electrode

Nanda, Jagjit; Datta, Moni Kanchan; Remillard, J. T.; O׳Neill, Ann E.; Kumta, Prashant N.

doi:10.1016/j.elecom.2008.11.006

Cited by 73 publications

(53 citation statements)

References 14 publications

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“…Another sharp peak at about 2700 cm −1 corresponds to the 2D band which has always been accompanied by the occurrence of a disordered carbon [22,23]. The D band is usually attributed to the vibrations of carbon atoms with dangling bonds for the in-plane terminations of disordered graphite, and the G band is a result of the inplane carbon to carbon stretching vibration mode of the wellcrystallized graphite [24,25]. After the nanomilling process, the degrees of graphitization of two materials are very similar.…”

Section: Resultsmentioning

confidence: 97%

Enhanced electrochemical performance of nanomilling Co2SnO4/C materials for lithium ion batteries

et al. 2015

Ionics

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Amorphous and crystalline hybrid structure Co 2 SnO 4 /C composites have been prepared by a facile way using coprecipitation process and high-energy ball milling technology. Electrochemical performance tests show that the composite anodes could maintain reversible capacity of higher than 550 mAh g −1 up to 100 cycles, much better than that of pure Co 2 SnO 4 (194.1 mAh g −1 ). These materials also present better rate performance with fairly stable capacity retention when the current ranges from 100 to 500 mA g −1 . Impedance measurements confirm that these composites are more beneficial for lithium diffusion compared to pure Co 2 SnO 4 . The graphite carbon not only buffers the volume expansion-related cracking but also provides excellent conductivity for this material.

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Section: Resultsmentioning

confidence: 97%

Enhanced electrochemical performance of nanomilling Co2SnO4/C materials for lithium ion batteries

et al. 2015

Ionics

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“…Phonon scattering is significantly reduced in amorphous Si, specifically at a particular frequency such as the TO phonon. [63,87] Raman scattering was previously used to demonstrate the transition from crystalline to amorphous Si in a carbon composite by monitoring the TO c-Si phonon mode [87]. Recently it was shown using Raman scattering that Li inserts anisotropically into single crystalline Si [88].…”

Section: Raman Scattering Of Lithiation In N-and P-type Si(100)mentioning

confidence: 99%

The influence of carrier density and doping type on lithium insertion and extraction processes at silicon surfaces

McSweeney

Lotty

Glynn

et al. 2014

Electrochimica Acta

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“…The D band is assigned to A 1g vibration mode, which results from low-symmetry carbon, carbon with lattice defects, and disordered carbon at the edge, while the G Fig. 1 XRD patterns of a nanoSi, b Si/C composite, and c Si/Ag/ C composite band is associated with the E 2g vibration mode, which results from the stretch vibration of sp 2 hybrid carbon in carboatomic rings or long-chain carbon [21]. The ratio of the integrated area of the D band and G band, R (I D /I G ), reflects the graphitization degree.…”

Section: Resultsmentioning

confidence: 99%

Deposition of silver nanoparticles into silicon/carbon composite as a high-performance anode material for Li-ion batteries

Hou

Zhang

Wang

et al. 2015

J Solid State Electrochem

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A silicon/silver/carbon (Si/Ag/C) composite with a core-core-shell structure has been synthesized via a simple method based on pyrolysis of an organic carbon source and silver mirror reaction. The Si and Ag nanoparticles are served as cores, while the porous amorphous carbon layer formed from pyrolysis of citric acid is served as shell. The porous amorphous carbon layer and highly conductive Ag nanoparticles can effectively alleviate the volume change of Si nanoparticles during lithiation/delithiation process and provide sufficient electrical conductivity for Si nanoparticles. As an anode material, the obtained Si/Ag/C composite exhibits excellent electrochemical performances, including high initial coulombic efficiency (85.6 % at 200 mA g −1 ), stable cycling performance (a discharge capacity of 2006.3 mA g −1 at 200 mA g −1 after 100 cycles), and excellent rate performance (a discharge capacity of 826.4 mA h g −1 at 3 A g −1 ). This simple method may open up an effective way to make other anode and cathode materials for commercial lithium-ion battery.

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In situ Raman microscopy during discharge of a high capacity silicon–carbon composite Li-ion battery negative electrode

Cited by 73 publications

References 14 publications

Enhanced electrochemical performance of nanomilling Co2SnO4/C materials for lithium ion batteries

Enhanced electrochemical performance of nanomilling Co2SnO4/C materials for lithium ion batteries

The influence of carrier density and doping type on lithium insertion and extraction processes at silicon surfaces

Deposition of silver nanoparticles into silicon/carbon composite as a high-performance anode material for Li-ion batteries

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