title: Evaluation of Tris-Bipyridine Chromium Complexes for Flow Battery Applications: Impact of Bipyridine Ligand Structure on Solubility and Electrochemistry.
abstract: This report describes the design, synthesis, solubility, and electrochemistry of a series of tris-bipyridine chromium complexes that exhibit up to six reversible redox couples as well as solubilities approaching 1 M in acetonitrile. We have systematically modified both the ligand structure and the oxidation state of these complexes to gain insights into the factors that impact solubility and electrochemistry. The results provide a set of structure-solubility-electrochemistry relationships to guide the future development of electrolytes for nonaqueous flow batteries. In addition, we have identified a promising candidate from the series of chromium complexes for further electrochemical and battery assessment.
authors.affiliation: Department of Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States.|Joint Center for Energy Storage Research (JCESR), Argonne, Illinois, United States.
authors.forename: Pablo J
authors.initials: PJ
authors.lastname: Cabrera
authors.affiliation: Department of Chemical Engineering, University of Michigan , 2300 Hayward Street, Ann Arbor, Michigan 48109, United States.|Joint Center for Energy Storage Research (JCESR), Argonne, Illinois, United States.
authors.forename: Xingyi
authors.initials: X
authors.lastname: Yang
authors.affiliation: Department of Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States.|Joint Center for Energy Storage Research (JCESR), Argonne, Illinois, United States.
authors.forename: James A
authors.initials: JA
authors.lastname: Suttil
authors.affiliation: Department of Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States.|Joint Center for Energy Storage Research (JCESR), Argonne, Illinois, United States.
authors.forename: Rachel E M
authors.initials: RE
authors.lastname: Brooner
authors.affiliation: Department of Chemical Engineering, University of Michigan , 2300 Hayward Street, Ann Arbor, Michigan 48109, United States.|Joint Center for Energy Storage Research (JCESR), Argonne, Illinois, United States.
authors.forename: Levi T
authors.initials: LT
authors.lastname: Thompson
authors.affiliation: Department of Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States.|Joint Center for Energy Storage Research (JCESR), Argonne, Illinois, United States.
authors.forename: Melanie S
authors.initials: MS
authors.lastname: Sanford