Development of Anode Wicks for Liquid Metal Sodium Batteries (original) (raw)

ECS Meeting Abstracts

Abstract

One of the major technical hurdles in developing liquid metal sodium batteries, such as sodium beta-alumina batteries (NBBs), is designing an anode wick which is responsible for facile shuttling of liquid metal and electrons upon cycling. The anode wicks utilize either or both principles of the capillary effect via sophisticated design of its geometry, and the surface tension between the wick and liquid metal via surface treatment of the wick material. It's geometry and surface treatment should be carefully selected because its shuttling capability strongly depends on the travel distance of liquid metal, ranging from tens of microns to over a centimeter, and cell operation temperature especially when the operation current is high. In this study, different types of anode wicks are devised based on the two principles. The wicks are implemented to one of the most promising liquid metal batteries with Na-NiCl2 chemistry, and their performances are evaluated by varying current densit...

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