Issue 17, 2018
From the journal:

RSC Advances

The role of thermal annealing on the microstructures of (Ti, Fe)-alloyed Si thin-film anodes for high-performance Li-ion batteries†

Minsub Oh,a   Ilwhan Kim,ab   Hoo-Jeong Lee,a   Seungmin Hyun‡*b  and  Chiwon Kang‡*a  

* Corresponding authors

a School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon, Republic of Korea
E-mail: chiwonkang@skku.edu

b Nano-Convergence Mechanical Systems Research Division, Korea Institute of Machinery and Materials (KIMM), Daejeon, Republic of Korea
E-mail: hyun@kimm.re.kr

Abstract

Here, we studied the effect of thermal annealing on the microstructure and cyclic stability of a (Ti, Fe)-alloyed Si thin-film fabricated by a simple sputtering deposition method for Li-ion battery (LIB) anodes. The anode samples annealed at different temperatures (300–600 °C) were subjected to microstructure analysis and LIB performance test. The (Ti, Fe)-alloyed Si thin-film anode delivered a high capacity of 1563 mA h g−1 for 100 cycles at 0.1 A g−1 with nearly 100% capacity retention. Post-mortem analysis using field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) disclosed the microstructural changes of the cycled anodes, revealing that (Ti, Fe) silicides served as a structural buffer against the large volume change of active Si during cycling for enhanced LIB performance.

Graphical abstract: The role of thermal annealing on the microstructures of (Ti, Fe)-alloyed Si thin-film anodes for high-performance Li-ion batteries

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DOI
https://doi.org/10.1039/C7RA13172K
Article type
Paper
Submitted
09 Dec 2017
Accepted
21 Feb 2018
First published
01 Mar 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 9168-9174

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The role of thermal annealing on the microstructures of (Ti, Fe)-alloyed Si thin-film anodes for high-performance Li-ion batteries

M. Oh, I. Kim, H. Lee, S. Hyun and C. Kang, RSC Adv., 2018, 8, 9168 DOI: 10.1039/C7RA13172K

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