A room temperature study of the binary lithium–silicon and the ternary lithium–chromium–silicon system for use in rechargeable lithium batteries

Weydanz, Wolfgang; Wohlfahrt‐Mehrens, M.; Huggins, Robert A.

doi:10.1016/s0378-7753(99)00139-1

Cited by 308 publications

(215 citation statements)

References 5 publications

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“…The active material loading was of about 3 mg cm −2 . Prior to full lithium ion cell assembling, the Cu-supported graphene nanoplatelets electrode was partially activated by contacting it with a Li foil wet by LP30 solution (EC:DMC 1:1, LiPF 6 1 M , Merck) for 30 min and then washed by DMC solution, following removed by vacuum for 20 min. Micro-Raman measurements were performed by using a Renishaw InVia spectrometer, equipped by an Ar + laser of 514.5 nm wavelength, with limited power and proper focusing conditions to avoid damage or modifi cations of the sample.…”

Section: Methodsmentioning

confidence: 99%

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Characteristics of a Graphene Nanoplatelet Anode in Advanced Lithium‐Ion Batteries Using Ionic Liquid Added by a Carbonate Electrolyte

Agostini

Rizzi²,

Cesareo³

et al. 2015

Adv Materials Inter

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A Cu‐supported, graphene nanoplatelet (GNP) electrodes are reported a as high performance anode in lithium ion battery. The electrode precursor is an easy‐to‐handle aqueous ink cast on cupper foil and following dried in air. The scanning electron microscopy evidences homogeneous, micrometric flakes‐like morphology. Electrochemical tests in conventional electrolyte reveal a capacity of about 450 mAh g−1 over 300 cycles, delivered at a current rate as high as 740 mA g−1. The graphene‐based electrode is characterized using a N‐butyl‐N‐methyl‐pyrrolidiniumbis (trifluoromethanesulfonyl) imide, lithium‐bis(trifluoromethanesulfonyl)imide (Py1,4TFSI–LiTFSI) ionic liquid‐based solution added by ethylene carbonate (EC): dimethyl carbonate (DMC). The Li‐electrolyte interface is investigated by galvanostatic and potentiostatic techniques as well as by electrochemical impedance spectroscopy, in order to allow the use of the graphene‐nanoplatelets as anode in advanced lithium‐ion battery. Indeed, the electrode is coupled with a LiFePO4 cathode in a battery having a relevant safety content, due to the ionic liquid‐based electrolyte that is characterized by an ionic conductivity of the order of 10−2 S cm−1, a transference number of 0.38 and a high electrochemical stability. The lithium ion battery delivers a capacity of the order of 150 mAh g−1 with an efficiency approaching 100%, thus suggesting the suitability of GNPs anode for application in advanced configuration energy storage systems.

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Section: Methodsmentioning

confidence: 99%

“…Among the negative electrodes, lithium metal alloys, such as lithium-tin (Li-Sn) [1][2][3] and lithium-silicon (Li-Si), [4][5][6][7][8][9][10] GNPs suitable material for battery application, i.e., providing a satisfactory tap-density, an enhanced Li-uptake mechanism, and a good transport property.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of a Graphene Nanoplatelet Anode in Advanced Lithium‐Ion Batteries Using Ionic Liquid Added by a Carbonate Electrolyte

Agostini

Rizzi²,

Cesareo³

et al. 2015

Adv Materials Inter

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“…For both binary Li-Si and ternary Li-Si-Cr composites containing dendritic copper powder (Weydanz et al, 1999) obtained reversible capacities of about ~ 500 and 800 mAh g -1 respectively. The higher capacity of 'Li-Si-Cr' composite is attributed to insito generated CrSi phase which acts as an inactive conductive matrix along with active Li-Si phase.…”

Section: Silicon Composite Anode Materials -State Of the Artmentioning

confidence: 99%

Silicon Based Composite Anode for Lithium Ion Battery

Veluchamy¹,

Doh²

2011

Nanocomposites and Polymers With Analytical Methods

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“…7 However, lithium/silicon alloys usually exhibit rapid capacity fading during cycling. 8,9 This is mainly attributed to the large volume change up to three times between lithium insertion and de-insertion reaction, which leads to physical stress and poor cyclability. Another factor for poor cycling performance is due to the low electrical conductivity of silicon materials.…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbon-coated Silicon/Graphite Composite Anode on the Electrochemical Properties

2008

Bulletin of the Korean Chemical Society

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The effects of carbon-coated silicon/graphite (Si/Gr.) composite anode on the electrochemical properties were investigated. The nanosized silicon particle shows a good cycling performance with a reasonable value of the first reversible capacity as compared with microsized silicon particle. The carbon-coated silicon/graphite composite powders have been prepared by pyrolysis method under argon/10 wt% propylene gas flow at 700 o C for 7 h. Transmission electron microscopy (TEM) analysis indicates that the carbon layer thickness of 5 nm was coated uniformly onto the surface silicon powder. It is confirmed that the insertion of lithium ions change the crystalline silicon phase into the amorphous phase by X-ray diffraction (XRD) analysis. The carbon-coated composite silicon/graphite anode shows excellent cycling performance with a reversible value of 700 mAh/g. The superior electrochemical characteristics are attributed to the enhanced electronic conductivity and low volume change of silicon powder during cycling by carbon coating.

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A room temperature study of the binary lithium–silicon and the ternary lithium–chromium–silicon system for use in rechargeable lithium batteries

Cited by 308 publications

References 5 publications

Characteristics of a Graphene Nanoplatelet Anode in Advanced Lithium‐Ion Batteries Using Ionic Liquid Added by a Carbonate Electrolyte

Characteristics of a Graphene Nanoplatelet Anode in Advanced Lithium‐Ion Batteries Using Ionic Liquid Added by a Carbonate Electrolyte

Silicon Based Composite Anode for Lithium Ion Battery

Effect of Carbon-coated Silicon/Graphite Composite Anode on the Electrochemical Properties

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