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Sb-AlC0.75-C composite anodes for high-performance sodium-ion batteries

Authors
Jung, Gyu JinLee, YonghoMun, Yoo SeokKim, HyeongwooHur, JaehyunKim, Tae YoungSuh, Kwang S.Kim, Ji HyeonLee, DaehoChoi, WonchangKim, Il Tae
Issue Date
1-2월-2017
Publisher
ELSEVIER SCIENCE BV
Keywords
Sodium-ion batteries; Aluminum-antimony alloy; Hybrid matrix; Mechanical milling
Citation
JOURNAL OF POWER SOURCES, v.340, pp.393 - 400
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF POWER SOURCES
Volume
340
Start Page
393
End Page
400
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/84485
DOI
10.1016/j.jpowsour.2016.11.086
ISSN
0378-7753
Abstract
Antimony (Sb) nanoparticles dispersed in a hybrid matrix consisting of aluminum (Al) and carbon, AlC0.75-C were synthesized via one-step high-energy mechanical milling (HEMM) process and assessed as potential anode materials for use in sodium-ion batteries. The introduction of carbon during HEMM led to the formation of individual Sb nanoparticles dispersed in the AlC0.75-C matrix; in the absence of carbon during HEMM, an AlSb alloy was formed. The Sb-AlC0.75-C composite anodes demonstrated better cycling performance as well as higher rate capability compared to an AlSb anode; these improved properties could be due to the well-developed Sb phase, which acts as an electrochemically active nanocrystalline material in the AlC0.75/carbon conductive matrix. Furthermore, when fluoroethylene carbonate (FEC) was added to the electrolyte, the sodium-ion cells exhibited the best electrochemical performances, corresponding to a capacity retention of 83% at 100 cycles at 100 mA g(-1) and a high rate capacity retention of 58% at 5000 mA g(-1). In addition, the as-prepared Sb-AlC0.75-C composite has a high tap density; thus, its volumetric capacity was approximately three times that of carbon. (C) 2016 Elsevier B.V. All rights reserved.
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