Carbon-coated nano-Si dispersed oxides/graphite composites as anode material for lithium ion batteries

Lee, Heon-Young; Lee, Sung-Man

doi:10.1016/j.elecom.2004.03.005

Cited by 188 publications

(44 citation statements)

References 17 publications

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“…Thus, Si, Sn and Sb are defined as active elements for Li inserting. However, their cycle life is much shorter than graphite's [4][5][6][7][8] . As a result, they have not been applied to commercial batteries.…”

Section: Introductionmentioning

confidence: 98%

“…Many investigations revealed that some metallic and submetallic crystals could form some intermetallic compounds with Li and exhibit a much higher capacity than graphite. For example, the theoretical specific capacities were 4200, 994 and 900 mAh/g for Li 22 Si 5 [4,5] , Li 22 Sn 5 [6,7] and Li 3 Sb [8] , respectively. Thus, Si, Sn and Sb are defined as active elements for Li inserting.…”

Section: Introductionmentioning

confidence: 99%

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Melt-spun Al70−X Si30Mn X (X=0, 3, 5, 7, 10) anode in lithium-ion batteries

Sun

Wang

et al. 2008

Sci. China Ser. E-Technol. Sci.

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Al 70-X Si 30 Mn X (X=0, 3, 5, 7, 10, mol%) ribbons were prepared by melt spinning. A supersaturated solid solution of Si and Mn in fcc Al and some microstructures consisting of nano grains were obtained. Some alloys with nano-sized grains exhibited high discharge capacities and favorable cycle properties. The capacity of more than 400 mAh/g could be obtained in melt-spun Al 67 Si 30 Mn 3 alloy after 20 cycles and more than 300 mAh/g after 40 cycles. Li/Si and Li/Al compounds in the anodes of pure Al and pure Si were not detected in Al-Si-Mn alloys inserted by Li. It is considered that the formation of the supersaturated solid solution and refinement of microstructures have prevented the alloys from the forming the compounds with superfluous Li. As a result, the electrochemical properties have been improved.Al-Si-Mn alloy, melt spinning, microstructure, electrochemical property

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Melt-spun Al70−X Si30Mn X (X=0, 3, 5, 7, 10) anode in lithium-ion batteries

Sun

Wang

et al. 2008

Sci. China Ser. E-Technol. Sci.

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“…It is well known that during the first lithiation process, lithium reacts with SiO and forms nanosilicon and Li 2 O. The nano-silicon then reacts with Li and forms Li-Si alloy (Lee & Lee, 2004). Contrary to this explanation (Miyachi et al, 2006) showed through O 1s spectra analysis that during the first lithiation process a direct absorption of Li by SiO takes place giving rise to the formation of Li 4 SiO 4 and Li 2 O.…”

Section: Charge/discharge Characteristicsmentioning

confidence: 96%

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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Carbon-coated nano-Si dispersed oxides/graphite composites as anode material for lithium ion batteries

Cited by 188 publications

References 17 publications

Melt-spun Al70−X Si30Mn X (X=0, 3, 5, 7, 10) anode in lithium-ion batteries

Melt-spun Al70−X Si30Mn X (X=0, 3, 5, 7, 10) anode in lithium-ion batteries

Silicon Based Composite Anode for Lithium Ion Battery

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

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