期刊
ELECTROCHIMICA ACTA
卷 113, 期 -, 页码 149-155出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.09.093
关键词
Tin dioxide; Graphite oxide; Graphene; Anode; Lithium ion batteries
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Korea government (MSIP) [2013R1A2A2A04015089]
- Korea government (MOE) [2013R1A1A4A01008858]
- National Research Foundation of Korea [2013R1A1A4A01008858] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
SnO2/graphene nanocomposites were prepared from graphite oxide (GTO). Sn2+ precursors were impregnated between graphene layers of GTO and subsequently subjected to thermal treatment to produce nanocomposites consisting of SnO2 and reduced GTO (SnO2/rGTO). When thermally reduced, the prealigned nature of graphene layers in GTO produced densely packed and thick graphene stacks, in contrast to graphene layers in the SnO2 nanocomposites (SnO2/rGO) made from thermal reduction of mechanically exfoliated graphene oxide (GO). The surface area and void volume of the SnO2/rGTO nanocomposites (280 m(2) g(-1) and 0.27 cm(3) g(-1), respectively) were significantly decreased, by comparison with those of the SnO2/rGO nanocomposites (390 m(2) g(-1) and 0.39 cm(3) g(-1), respectively), which resulted in an enhanced dimensional-stability of SnO2 during the lithium alloying/dealloying processes. As a result, SnO2/rGTO proved to be superior to SnO2/rGO as an anode material in lithium ion batteries from the view-point of both reversible charge-discharge (C-D) capacity and cyclability. The simplification of the nanocomposite preparation process (the removal of mechanical exfoliation) is an additional benefit of using GTO as a template. (C) 2013 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据