TY - JOUR
T1 - Shedding Light on the Oxygen Reduction Reaction Mechanism in Ether-Based Electrolyte Solutions
T2 - A Study Using Operando UV-Vis Spectroscopy
AU - Hirshberg, Daniel
AU - Sharon, Daniel
AU - Afri, Michal
AU - Lavi, Ronit
AU - Frimer, Aryeh A.
AU - Metoki, Noa
AU - Eliaz, Noam
AU - Kwak, Won Jin
AU - Sun, Yang Kook
AU - Aurbach, Doron
N1 - Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/4/4
Y1 - 2018/4/4
N2 - Using UV-vis spectroscopy in conjunction with various electrochemical techniques, we have developed a new effective operando methodology for investigating the oxygen reduction reactions (ORRs) and their mechanisms in nonaqueous solutions. We can follow the in situ formation and presence of superoxide moieties during ORR as a function of solvent, cations, anions, and additives in the solution. Thus, using operando UV-vis spectroscopy, we found evidence for the formation of superoxide radical anions during oxygen reduction in LiTFSI/diglyme electrolyte solutions. Nitro blue tetrazolium (NBT) was used to indicate the presence of superoxide moieties based on its unique spectral response. Indeed, the spectral response of NBT containing solutions undergoing ORR could provide a direct indication for the level of association of the Li cations with the electrolyte anions.
AB - Using UV-vis spectroscopy in conjunction with various electrochemical techniques, we have developed a new effective operando methodology for investigating the oxygen reduction reactions (ORRs) and their mechanisms in nonaqueous solutions. We can follow the in situ formation and presence of superoxide moieties during ORR as a function of solvent, cations, anions, and additives in the solution. Thus, using operando UV-vis spectroscopy, we found evidence for the formation of superoxide radical anions during oxygen reduction in LiTFSI/diglyme electrolyte solutions. Nitro blue tetrazolium (NBT) was used to indicate the presence of superoxide moieties based on its unique spectral response. Indeed, the spectral response of NBT containing solutions undergoing ORR could provide a direct indication for the level of association of the Li cations with the electrolyte anions.
KW - Li-polymer batteries
KW - LiTFSI/diglyme electrolyte solutions
KW - UV-vis spectroscopy
KW - cyclic voltammetry (CV) curves
KW - oxygen reduction reactions (ORRs)
UR - http://www.scopus.com/inward/record.url?scp=85044976573&partnerID=8YFLogxK
U2 - 10.1021/acsami.7b18376
DO - 10.1021/acsami.7b18376
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C2 - 29513511
AN - SCOPUS:85044976573
SN - 1944-8244
VL - 10
SP - 10860
EP - 10869
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 13
ER -