✦ LIBER ✦

A new approach to the study of relaxation processes in electrochemical systems

✍ Scribed by A.K. Sleigh; W.R. McKinnon

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 908 KB
Volume: 34
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(89)87039-2

No coin nor oath required. For personal study only.

✦ Synopsis

We present a new approach to the analysis of the decay of voltage V with time c after a current pulse has been applied to an electrochemical system. We show that a plot of -td V/dt is an approximation to the spectrum of relaxation times that characterize the decay of Vas a combination ofexponential decays, and show how well such a plot can resolve different time constants. We then apply this method to a Li/(LiAsF,-propylene carbonate)/Li system and show that not only can we measure the diffusion constant for the salt in the electrolyte, but also obtain information about polypropylene films used as separators between the electrodes. Using this technique we also show the onset of convection in the electrolyte in cells without separators

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