Encyclopedia of Applied Electrochemistry

2014 Edition
| Editors: Gerhard Kreysa, Ken-ichiro Ota, Robert F. Savinell

Lithium-Sulfur Batteries

  • Hikari Sakaebe
Reference work entry
DOI: https://doi.org/10.1007/978-1-4419-6996-5_439

Introduction

Li-S battery system is advantageous due to theoretically higher energy density (2,600 Wh kg−1 assuming the redox reaction of 2Li + S⇄ Li2S), and thus research and development for sulfur electrode had started in 1960–1970s [1, 2, 3].

The difficulty in Li-S battery operated at ambient temperature lies in two points: conductivity and the solubility of partly lithiated polysulfides, LixS8. S powder is usually a yellow powder and it has poor conductivity. So the conduction pathway should be ensured. At present, preparation of composite of S and carbons has been attracting many researcher for improvement. Present status will be outlined later in the next section.

It was reported that polysulfide, Li xS 8,formed during the way of the discharge and charge of the battery and undergoes electrochemical reaction in the liquid phase in the organic solvent [ 4, 5]. This causes a worse efficiency and a poor cycleability. As shown in Fig. 1, polysulfides are thought to undergo the cycling...
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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Research Institute for Ubiquitous Energy Devices, National Institute of Advanced Industrial Science and Technology (AIST)IkedaJapan