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http://dx.doi.org/10.5229/JKES.2008.11.4.284

Preparation and Characterization of a Sn-Anode Fabricated by Organic-Electroplating for Rechargeable Thin-Film Batteries  

Kim, Dong-Hun (Korea Electrotechnology Research Institute)
Doh, Chil-Hoon (Korea Electrotechnology Research Institute)
Lee, Jeong-Hoon (Korea Electrotechnology Research Institute)
Lee, Duck-Jun (Korea Electrotechnology Research Institute)
Ha, Kyeong-Hwa (Korea Electrotechnology Research Institute)
Jin, Bong-Soo (Korea Electrotechnology Research Institute)
Kim, Hyun-Soo (Korea Electrotechnology Research Institute)
Moon, Seong-In (Korea Electrotechnology Research Institute)
Hwang, Young-Ki (Gyeongnam University)
Publication Information
Journal of the Korean Electrochemical Society / v.11, no.4, 2008 , pp. 284-288 More about this Journal
Abstract
Sn-thin film as high capacitive anode for thin film lithium-ion battery was prepared by organic-electrolyte electroplating using Sn(II) acetate. Electrolytic solution including $Li^+$ and $Sn^{2+}$ had 3 reduction peaks at cyclic voltammogram. Current peak at $2.0{\sim}2.5\;V$ region correspond to the electroplating of Sn on Ni substrate. This potential value is lower than 2.91 V vs. $Li^+/Li^{\circ}$, of the standard reduction potential of $Sn^{2+}$ under aqueous media. It is the result of high overpotential caused by high resistive organic electrolytic solution and low $Sn^{2+}$ concentration. Physical and electrochemical properties were evaluated using by XRD, FE-SEM, cyclic voltammogram and galvanostatic charge-discharge test. Crystallinity of electroplated Sn-anode on a Ni substrate could be increased through heat treatment at $150^{\circ}C$ for 2 h. Cyclic voltammogram shows reversible electrochemical reaction of reduction(alloying) and oxidation(de-alloying) at 0.25 V and 0.75 V, respectively. Thickness of Sn-thin film, which was calculated based on electrochemical capacity, was $7.35{\mu}m$. And reversible capacity of this cell was $400{\mu}Ah/cm^2$.
Keywords
Thin film; Anode; Sn; Organic electrolyte-electroplating;
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