TY - GEN
T1 - Probing redox reaction mechanisms in nanocrystalline spinel ferrites utilizing x-ray absorption spectroscopy techniques
AU - Cama, Christina A.
AU - Holtzman, Luke N.
AU - Zhang, Yiman
AU - Takeuchi, Esther S.
AU - Takeuchi, Kenneth J.
AU - Marschilok, Amy C.
N1 - Publisher Copyright:
© 2017 The Electrochemical Society.
PY - 2017
Y1 - 2017
N2 - Spinel ferrites such as CuFe2O4, Fe3O4 and ZnFe2O4 are promising anode materials for lithium-ion batteries due to their high theoretical capacities, natural elemental abundances and non-toxicity. Although these spinels are from a related family of materials, there are differences among their cation arrangements, thus, providing an opportunity to study their redox mechanisms during lithiation and delithiation. X-ray Absorption Spectroscopy (XAS) techniques which analyze x-ray absorption near edge structure (XANES) and extended x-ray absorption fine structure (EXAFS) offer insight into both local geometry and electronic structure of the absorbing atom. Additionally, when combined with x-ray microscopy, these methods can detect subtle electronic changes at resolutions as low as 10 nm. With this level of insight, XAS is a necessary tool to probe the redox mechanism of the spinel ferrites. Herein, the ex-situ XAS analysis of spinel ferrites is described to highlight the changes to the metal centers during discharge and charge.
AB - Spinel ferrites such as CuFe2O4, Fe3O4 and ZnFe2O4 are promising anode materials for lithium-ion batteries due to their high theoretical capacities, natural elemental abundances and non-toxicity. Although these spinels are from a related family of materials, there are differences among their cation arrangements, thus, providing an opportunity to study their redox mechanisms during lithiation and delithiation. X-ray Absorption Spectroscopy (XAS) techniques which analyze x-ray absorption near edge structure (XANES) and extended x-ray absorption fine structure (EXAFS) offer insight into both local geometry and electronic structure of the absorbing atom. Additionally, when combined with x-ray microscopy, these methods can detect subtle electronic changes at resolutions as low as 10 nm. With this level of insight, XAS is a necessary tool to probe the redox mechanism of the spinel ferrites. Herein, the ex-situ XAS analysis of spinel ferrites is described to highlight the changes to the metal centers during discharge and charge.
UR - https://www.scopus.com/pages/publications/85030479445
U2 - 10.1149/07711.0035ecst
DO - 10.1149/07711.0035ecst
M3 - Conference contribution
AN - SCOPUS:85030479445
SN - 9781623324605
T3 - ECS Transactions
SP - 35
EP - 45
BT - Selected Proceedings from the 231st ECS Meeting New Orleans, LA - Spring 2017
PB - Electrochemical Society Inc.
T2 - 231st ECS Meeting
Y2 - 28 May 2017 through 1 June 2017
ER -