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An All‐Organic Non‐aqueous Lithium‐Ion Redox Flow Battery
Author(s) -
Brushett Fikile R.,
Vaughey John T.,
Jansen Andrew N.
Publication year - 2012
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201200322
Subject(s) - redox , materials science , electrochemistry , flow battery , lithium (medication) , electrolyte , aqueous solution , battery (electricity) , faraday efficiency , substituent , lithium ion battery , molecule , quinoxaline , ion , inorganic chemistry , chemical engineering , electrode , organic chemistry , chemistry , thermodynamics , medicine , power (physics) , physics , engineering , metallurgy , endocrinology
A non‐aqueous lithium‐ion redox flow battery employing organic molecules is proposed and investigated. 2,5‐Di‐tert‐butyl‐1,4‐bis(2‐methoxyethoxy)benzene and a variety of molecules derived from quinoxaline are employed as initial high‐potential and low‐potential active materials, respectively. Electrochemical measurements highlight that the choice of electrolyte and of substituent groups can have a significant impact on redox species performance. The charge‐discharge characteristics are investigated in a modified coin‐cell configuration. After an initial break‐in period, coulombic and energy efficiencies for this unoptimized system are ∼70% and ∼37%, respectively, with major charge and discharge plateaus between 1.8‐2.4 V and 1.7‐1.3 V, respectively, for 30 cycles. Performance enhancements are expected with improvements in cell design and materials processing.