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Cho, Jaephil
Nano Energy Storage Material Lab.
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Effect of capping agents in tin nanoparticles on electrochemical cycling

Author(s)
Kwon, YoojungKim, Min GyuKim, YoojinLee, YoungilCho, Jaephil
Issued Date
2006
DOI
10.1149/1.2138447
URI
https://scholarworks.unist.ac.kr/handle/201301/4707
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=33645512482
Citation
ELECTROCHEMICAL AND SOLID STATE LETTERS, v.9, no.1, pp.A34 - A38
Abstract
Tin particles that were prepared using three different capping agents, hydrobenzamide, citrate, and polyvinyl pyrrolidone (PVP) exhibited different particle sizes. The hydrobenzamide-capped Sn had the smallest particle size (∼50 nm) and uniform distribution while the citrate and PVP-capped Sn had particle sizes of ∼100 and ∼300 nm, respectively, with severe particle aggregation. However, there was no SnO2 or SnO detected on the particle surfaces. The cycling results using coin-type half cells confirmed that the hydrobenzamide-capped Sn had the highest charge capacity of 994 mAh/g between 1.5 and 0 V and the best capacity retention. In contrast, the citrate and PVP-capped Sn showed severe capacity decay. Further analysis using cycled electrodes showed that the hydrobenzamide-capped Sn showed the least particle agglomeration and growth, compared with the others. From Fourier transform magnitude (FT) of Sn LIII-edge energy dispersive X-ray analysis spectra, these facts could be supported by the strong coordination formed as a result of chemical bonding between the nitrogen of the hydrobenzamide capping agent effectively inhibiting the particle growth during cycling.
Publisher
ELECTROCHEMICAL SOC INC
ISSN
1099-0062
Keyword
LITHIUM SECONDARY BATTERIESLI-ION BATTERIESANODE MATERIALSCORE/SHELL NANOPARTICLESSILVERSIZEINTERMETALLICSPERFORMANCECOMPOSITESCARBON

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