Open AccessContinuous Shuttle Current Measurement Method for Lithium Sulfur Cells
Author(s) -
C. Maurer,
Walter Commerell,
Andreas Hintennach,
Andreas Jossen
Publication year - 2020
Publication title -
journal of the electrochemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.258
H-Index - 271
eISSN - 1945-7111
pISSN - 0013-4651
DOI - 10.1149/1945-7111/ab8e81
Subject(s) - self discharge , current (fluid) , plateau (mathematics) , polysulfide , battery (electricity) , faraday efficiency , voltage , lithium (medication) , energy storage , nuclear engineering , energy (signal processing) , materials science , electrical engineering , analytical chemistry (journal) , chemistry , electrode , thermodynamics , engineering , physics , electrochemistry , environmental chemistry , mathematics , medicine , electrolyte , mathematical analysis , power (physics) , quantum mechanics , endocrinology
Lithium Sulfur (Li-S) batteries are a promising energy storage technology with very high theoretical limits in terms of specific capacity and specific energy. However, these batteries suffer from high self-discharge rates, associated with a low coulombic efficiency due to the polysulfide shuttle mechanism. A better understanding of the self-discharge characteristics and suppression of the self-discharge is of great interest for most applications. Hence, a continuous self-discharge current measurement method is applied to evaluate the self-discharge behavior of a Li-S battery, based on a corrected reference open-circuit voltage. The result is a continuous self-discharge current measurement method, that investigates the self-discharge in the upper plateau of a Li-S battery at 10 °C and 25 °C. This self-discharge current displays a plateau and extended balancing times directly before this plateau and is validated by a discrete self-discharge current measurement method at 10 °C and 25 °C. Furthermore, the activation energy is continuously calculated for the upper plateau and compared to a discrete reference measurement.