(De)lithiation of spinel ferrites Fe3O4, MgFe2O4, and ZnFe2O4: a combined spectroscopic, diffraction and theory study

Bock, David C.; Tallman, Killian R.; Guo, Haoyue; Quilty, Calvin; Yan, Shan; Smith, Paul F.; Zhang, Bingjie; Lutz, Diana M.; McCarthy, Alison H.; Huie, Matthew M.; Burnett, Veronica; Bruck, Andrea M.; Marschilok, Amy C.; Takeuchi, Esther S.; Liu, Ping; Takeuchi, Kenneth J.

doi:10.1039/d0cp02322a

(De)lithiation of spinel ferrites Fe₃O₄, MgFe₂O₄, and ZnFe₂O₄: a combined spectroscopic, diffraction and theory study

Journal Article · Tue Nov 17 00:00:00 EST 2020 · Physical Chemistry Chemical Physics. PCCP

DOI:https://doi.org/10.1039/d0cp02322a· OSTI ID:1749901

Bock, David C. ^[1]; ^[2]; Guo, Haoyue ^[2]; ^[3]; Yan, Shan ^[1]; ^[4]; Zhang, Bingjie ^[2]; ^[5]; ^[6]; Huie, Matthew M. ^[2]; Burnett, Veronica ^[2]; ^[2]; ^[7]; ^[7]; ^[1]; ^[8]

Brookhaven National Lab. (BNL), Upton, NY (United States)
Stony Brook Univ., NY (United States)
Department of Chemistry; State University of New York at Stony Brook; Stony Brook; USA
Stony Brook Univ., NY (United States); Valparaiso Univ., IN (United States)
Stony Brook Univ., NY (United States); Elmira College, NY (United States)
Stony Brook Univ., NY (United States); College of New Jersey, Ewing, NJ (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States); State Univ. of New York (SUNY), Stony Brook, NY (United States)
State Univ. of New York (SUNY), Stony Brook, NY (United States)

Iron based materials hold promise as next generation battery electrode materials for Li ion batteries due to their earth abundance, low cost, and low environmental impact. The iron oxide, magnetite Fe₃O₄, adopts the spinel (AB₂O₄) structure. Other 2+ cation transition metal centers can also occupy both tetrahedral and/or octahedral sites in the spinel structure including MgFe₂O₄, a partially inverse spinel, and ZnFe₂O₄, a normal spinel. Though structurally similar to Fe₃O₄ in the pristine state, previous studies suggest significant differences in structural evolution depending on the 2+ cation in the structure. This investigation involves X-ray absorption spectroscopy and X-ray diffraction affirmed by density functional theory (DFT) to elucidate the role of the 2+ cation on the structural evolution and phase transformations during (de)lithiation of the spinel ferrites Fe₃O₄, MgFe₂O₄, and ZnFe₂O₄. The cation in the inverse, normal and partially inverse spinel structures located in the tetrahedral (8a) site migrates to the previously unoccupied octahedral 16c site by 2 electron equivalents of lithiation, resulting in a disordered [A]_16c[B₂]_16dO₄ structure. DFT calculations support the experimental results, predicting full displacement of the 8a cation to the 16c site at 2 electron equivalents. Here, substitution of the 2+ cation results in segregation of oxidized phases in the charged state. This report provides significant structural insight into the (de)lithiation mechanisms for an intriguing class of iron oxide materials.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-06CH11357; SC0012673; SC0012704

OSTI ID:: 1749901

Alternate ID(s):: OSTI ID: 1716533
OSTI ID: 1729694
OSTI ID: 1760537

Report Number(s):: BNL-220742-2020--JAAM

Journal Information:: Physical Chemistry Chemical Physics. PCCP, Journal Name: Physical Chemistry Chemical Physics. PCCP Journal Issue: 45 Vol. 22; ISSN 1463-9076

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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