%0 Journal Article
%K Self-discharge
%K Current-collector
%K Li–S cell
%K Open-circuit voltage
%K Stainless steel
%A Ho-Suk Ryu
%A Hyo-Jun Ahn
%A Ki-Won Kim
%A Jou-Hyeon Ahn
%A Jeong Yong Lee
%A Elton J Cairns
%B Journal of Power Sources
%D 2005
%N 2
%P 365-369
%R 10.1016/j.jpowsour.2004.08.039
%T Self-discharge of lithium–sulfur cells using stainless-steel current-collectors
%V 140
%8 02/2005
%! Journal of Power Sources
%X <p>The self-discharge behaviour of Li–S cell, is investigated through changes in the open-circuit voltage (OCV) and discharge capacity with storage time. A fresh Li–S cell experiences 72% sulfur utilization during the first discharge, as based on the theoretical capacity for the formation of Li<sub>2</sub>S. After 30 days of storage, the OCV has fallen from 2.48 to 2.16&nbsp;V and the discharge capacity has decreased from 1206 to 924&nbsp;mAh&nbsp;g<sup>−1</sup> (based on sulfur). Analysis of the self-discharged sample by a variety of techniques shows the formation of lithium polysulfides, such as Li<sub>2</sub>S<sub><em>n</em></sub> (<em>n</em> ≥ 1) from the reaction of lithium and sulfur, which is related to the corrosion of the stainless current-collector. Stainless steel is not the most appropriate current-collector material for Li–S cells. The extent of self-discharge can be decreased by using a gold-coated current-collector that offers protection against corrosion.</p>