Chapter Ten - Sulfur Pouch Cells

Abstract

Construction and composition of the pouch cell and its properties are described in the section. The role of swelling is explained. The Sion Power manufacturer Li-S pouch battery is described. The prototype of the pouch-typed Li-S cell using sulfur-carbon powder and results are discussed. Some aspects of the manufacturing of a Li-S pouch cell are discussed. The Li-S pouch cell using the solution of LiCF3SO3 and LiNO3 dissolved in DME/DOL as the electrolyte is described. The approach allowing a state of charge determination of lithium-sulphur batteries using in-situ impedance spectroscopy is discussed. A mixture of hydrofluoroether and sulfolane as a novel electrolyte approach for a Li-S cell, along with the results, is discussed. A pouch cell, assembled by stacking the lithium foil, separator, and cathode is reported. Its electrolyte is a solution of 8wt% lithium bis(trifluoromethanesulfonyl)imide, 4wt% lithium nitrate, 44wt% 1,2-dimethoxyethane, and 44wt% 1,3-dioxolane. The OXIS Energy prototype of a rechargeable Li-S pouch cell is presented. A prototype Li-S pouch cell composed of a sulfur cathode cast on NwC, lithium foil as anode, and two layers of porous separator soaked in liquid organic electrolyte is also described. Some aspects of modeling pouch cells are also included. An electric circuit model for a Li-S battery cell, the model of a pouch Li-S cell for the calculation of the volume energy density, a simplified schematic of a pouch Li-S cell, and a lumped-parameter thermal model of the battery module are shown.