Anodic Behavior of Lithium in Aqueous Electrolytes. IV. Influence of Temperature.
Abstract
The rapid dissolution of Li in alkaline aqueous solutions can be utilized electrochemically to produce very high rate batteries. In the Li-H2O system, the rate-limiting process is the oxidation of lithium rather than the reduction of H2O at the cathode. A critical examination of the corrosion processes has revealed that the H2O e.r. at the Li surface is rate determining, not the Li dissolution reaction (1). Thus, unlike conventional battery systems, in Li-H2O cells the current efficiency is governed by the ratio of two competing reactions, namely, the anodic dissolution reaction and the parasitic self-corrosion reaction (2). The current efficiency increases as the electrode is polarized from its OCV, and it decreases at elevated temperatures where the corrosion reaction is stimulated. One of the most important features of the system is the fact that the maximum current (or limiting current) obtained during andodic polarization never exceeds the OCV corrosion rate. This unusual behavior and the impact of elevated temperature on the faradaic efficiency of the cell are examined in this paper. (Author
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1979
- Accession Number
- ADA082638
Entities
Organizations
- Lockheed Martin Missiles and Space