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Enhancement of the electrochemical performance of silicon anodes through alloying with inert metals and encapsulation by graphene nanosheets

Title
Enhancement of the electrochemical performance of silicon anodes through alloying with inert metals and encapsulation by graphene nanosheets
Author
김동원
Keywords
Silicon alloy; Reduced graphene oxide; Electrochemical performance; Lithium-ion battery; Encapsulation
Issue Date
2016-08
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ELECTROCHIMICA ACTA, v. 209, Page. 278-284
Abstract
Silicon alloys composed of silicon nanoparticles embedded in inert Cu-Al-Fe matrix phases were synthesized and encapsulated with reduced graphene oxide (rGO) nanosheets. Successful synthesis of the silicon alloys and their encapsulation with rGO were confirmed by X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopic analyses. The silicon alloy encapsulated with an optimal amount of rGO delivered an initial discharge capacity of 1140.7 mAh g(-1) with good capacity retention and exhibited excellent rate capability. This superior performance could be attributed to the unique structure of silicon alloy encapsulated by rGO, which could effectively accommodate the large volume change during cycling and provide continuous electronic conduction pathway in the electrode. (C) 2016 Elsevier Ltd. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0013468616311355?via%3Dihubhttp://repository.hanyang.ac.kr/handle/20.500.11754/76266
ISSN
0013-4686; 1873-3859
DOI
j.electacta.2016.05.081
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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