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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 34, Number 4
BKCSDE 34(4)
April 20, 2013 

Binder-free Sn/Graphene Nanocomposites Prepared by Electrophoretic Deposition for Anode Materials in Lithium Ion Batteries
Eun Gyoung Bae, Yun-Hwa Hwang, Myoungho Pyo*
Graphene oxide, Ozonization, Electrophoretic deposition, Tin, Li ion batteries
Nanocomposites consisting of Sn nanoparticles and graphene oxide (GO) were electrophoretically deposited onto Cu current collectors that was used for anodes in Li ion batteries (LIBs). In order to optimize the electrochemical performance of nanocomposites as an anode material by controlling the oxygen functionality, the GO was subjected to O3 treatment prior to electrophoretic deposition (EPD). During thermal reduction of the GO in the nanocomposites, the Sn nanoparticles were reduced in size, along with the formation of SnO and/ or SnO2 at a small fraction, relying on the oxygen functionalities of the GO. The variation in the duration of time for the O3 irradiation resulted in a small change in total oxygen content, but in a significantly different fraction of each functional group in the GO, which influenced the Sn nanoparticle size and the amount of SnO (and/or SnO2). As a result, the EPD films prepared with the GO that possessed the least amount of carboxylic groups (made by treating GO in an O3 environment for 3 h) showed the best performance, when compared with the nanocomposites composed of untreated GO or GO that was O3-treated for a duration of less than 3 h.
1199 - 1204
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