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High temperature lithium/sulphur batteries: a preliminary investigation of a zeolite—sulphur cathode

✍ Scribed by J. Coetzer

Publisher
Elsevier Science
Year
1978
Tongue
English
Weight
257 KB
Volume
23
Category
Article
ISSN
0013-4686

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✦ Synopsis

A

reversjble lithium/sulphur high temperature cell is described in which the cathode consists of elemental sulphur absorbed in a zeolitc 4A matrix. A lithium-aluminium alloy is used for the anode and the electrolyte is a molten ionic salt consisting of a LiI-KI eutectic (m.p. 260"). The cell was operated at 300" and underwent more than 70 continuous charge/discharge cycles (800 h) without significant loss in efficiency. The coulombic efficiency was more than 90% and the energy density 404 Wh/kg (based on the masses of active electrode materials, viz lithium metal and zeolite 4A-sulphur).

The cell showed an open circuit voltage of 1.80 V, a short-circuit cd of about 1. I A/cm* and a maximum power of about 0.5 W/cm'. The internal resistance was 0.54 SL (cathode surkce area -3 cm*).

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