carbon Composite Spheres as Anode in Li-ion Batteries

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Nanosilica/carbon Composite Spheres as Anode in Li-ion Batteries with. Excellent Cycle Stability. Mingqi Li a, b, Yan Yua, Jing Lia, Baoling Chena, Xianwen ...
Electronic Supplementary Material (ESI) for Journal of Materials Chemistry A. This journal is © The Royal Society of Chemistry 2014

Supporting information

Nanosilica/carbon Composite Spheres as Anode in Li-ion Batteries with Excellent Cycle Stability Mingqi Li a, b, Yan Yu a, Jing Li a, Baoling Chen a, Xianwen Wu a, Ye Tian a and P. Chen a,* Department of Chemical Engineering, University of Waterloo, Waterloo, N2L3G1 Canada College of Chemistry and Chemical Engineering, China West Normal University, Nanchong 637009, China

TG DTA

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Temprature Difference / oC

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Temprature/oC

Figure S1 TG analysis curves of the nanosilica/carbon composite spheres 0.5

0.5

(b)

(a) 0.0

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1st 2nd 3rd-5th

-0.5

I/mA

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I/mA

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Potential/V (vs Li+/Li)

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Figure S2 CV curves of the nanosilica/carbon composite spheres in electrolytes with VC additive (a) and without additives (b)

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Specific Capacity/mAh g-1

Potential/V (vs Li+/Li)

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Specific Capacity/mAh g-1

Figure S3 CV curves (a) and charge-discharge profiles (b) of the disordered carbon excluding nanosilica; Charge-discharge profiles of the pristine nanosilica (c) 110

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Coulombic efficiency

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Specific Capacity/mAh g-1

Specific Capacity/mAh g-1

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Figure S4 Cycle performance of the disordered carbon and pristine nanosilica composite spheres

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Before cylcing 1st cycle 50th cycle 100th cycle

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Figure S5 EIS of the nanosilica electrode before cycling and after different cycles