✦ LIBER ✦

The importance of the lithium ion transference number in lithium/polymer cells

✍ Scribed by Marc Doyle; Thomas F. Fuller; John Newman

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 619 KB
Volume: 39
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(94)85091-7

No coin nor oath required. For personal study only.

✦ Synopsis

Al~tract--Simulation results are presented for a lithium negative electrode, solid polymer separator, manganese dioxide composite positive electrode cell. In particular, we assess the effect of conductivity and transference number on cell performance, establishing criteria for situations when a trade-off between these two properties is expected. We show that polymer-electrolyte systems with a unity transference number have improved performance over systems with t ° = 0.2, even when the conductivity is decreased by an order of magnitude. The improvements are primarily at higher rates of discharge, where the latter cell would be depleted of electrolyte due to large concentration gradients that develop. Cells with a unity transference number have larger energy densities and can attain higher peak-power densities.

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