期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 510, 期 1-2, 页码 12-19出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/S0022-0728(01)00532-0
关键词
composite electrode; binder distribution; cycling stability; Li storage alloy; Sn/SnSb; PVdF
It is demonstrated that the design of the composite electrode, or more precisely the morphology and distribution of the binder poly(vinylidine fluoride) (PVdF) within the composite electrode, has a significant impact on the cycling performance of Li storage alloy (Sn/SnSb) electrodes. Different binder morphologies and distributions have been obtained by using different solvents for the slurry preparation, such as 1-methyl-2-pyrrolidinone (NMP), in which PVdF is dissolved, yielding electrodes with a homogeneously and finely distributed binder, or decane, in which PVdF is only dispersed, yielding electrodes in which the original particle morphology of the binder powder is preserved. In constant current cycling tests carried out in an excess of electrolyte, the electrodes with the 'dispersed' binder show far better cycling capacities and stabilities than those with the 'dissolved' binder. This is explained by the different binding strengths, swelling behaviour in the electrolyte, electrode porosities, and possible 'buffer' effects of the compact and the finely distributed binders. (C) 2001 Published by Elsevier Science B.V.
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