Improved rate capability of lithium-ion batteries with Ag nanoparticles deposited onto silicon/carbon composite microspheres as an anode material

Title
Improved rate capability of lithium-ion batteries with Ag nanoparticles deposited onto silicon/carbon composite microspheres as an anode material
Author
선양국
Keywords
Li-ion battery; Composite anodes; Ag deposition; Si/C composite; Rate capability
Issue Date
2013-04
Publisher
Elsevier Science B.V., Amsterdam.
Citation
Solid State Ionics, April 2013, 237, P.28-33
Abstract
Ag-deposited silicon/carbon (Ag/Si/C) composite microspheres were synthesized and evaluated as an anode material for lithium-ion batteries (LIBs). The Si/poly(AN-co-TMSPM) composite microspheres were prepared through suspension polymerization and were decorated with Ag nanoparticles by a wet chemical method in an aqueous AgNO3 solution. Ag nanoparticles remained on the surface of the Si/carbon (Si/C) composite microspheres even after heat treatment at high temperatures. The Si/C and Ag/Si/C composite microspheres were characterized by. scanning electron microscopy, focused ion beam-scanning electron microscopy, and X-ray diffraction. The electrochemical performance of the Ag/Si/C composite electrode was compared to that of the Si/C composite electrodes using electrochemical impedance spectroscopy, constant current charging and discharging, and cycling performance at various cycling rates. The Ag/Si/C composite microspheres exhibited a higher specific capacity and better rate capability at the various current rates from C/10 to 5C than those of the Si/C composite electrode without Ag nanoparticles when they were used as the anode material in LIBs. These results suggest that the surface deposition with Ag nanoparticles contributes to the charge-transfer kinetics of the Si/C composite electrode. (C) 2013 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/abs/pii/S0167273813000969http://hdl.handle.net/20.500.11754/44095
ISSN
0167-2738
DOI
10.1016/j.ssi.2013.02.008
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE