期刊
JOURNAL OF POWER SOURCES
卷 97-8, 期 -, 页码 804-806出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/S0378-7753(01)00734-0
关键词
dendritic growth; lithium/polymer/lithium cells; Sand's law
We have studied the onset of dendritic growth in symmetrical lithium/polymer/lithium cells, at current densities ranging from 2 x 10(-2) to 3 x 10(-1) mA cm(-2). We observe that dendritic growth starts at a time t(cc) which follows a power law as a function of the current density, very close to Sand's law. However, in our experimental conditions no Sand behavior is expected. We attribute this surprising result to the existence and/or formation of local inhomogeneities on the surface of the electrodes. We discuss a preliminary model accounting for the observed behavior. (C) 2001 Elsevier Science B.V. All rights reserved.
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