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Title: Insights into ionic transport and structural changes in magnetite during multiple-electron transfer reactions

Journal Article · · Advanced Energy Materials
 [1];  [1];  [1];  [2];  [1];  [1];  [3];  [4];  [3];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. American Physical Society, Ridge NY (United States)
  3. Stony Brook Univ., Stony Brook, NY (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., Stony Brook, NY (United States)

Metal oxides, such as Fe3O4, hold promise for future battery applications due to their abundance, low cost, and opportunity for high lithium storage capacity. In order to better understand the mechanisms of multiple-electron transfer reactions leading to high capacity in Fe3O4, a comprehensive investigation on local ionic transport and ordering is made by probing site occupancies of anions (O2–) and cations (Li+, Fe3+/Fe2+) using multiple synchrotron X-ray and electron-beam techniques, in combination with ab-initio calculations. Results from this study provide the first experimental evidence that the cubic-close-packed (ccp) O-anion array in Fe3O4 is sustained throughout the lithiation and delithiation processes, thereby enabling multiple lithium intercalation and conversion reactions. Cation displacement/reordering occurs within the ccp O-anion framework, which leads to a series of phase transformations, starting from the inverse spinel phase and turning into intermediate rock-salt-like phases (LixFe3O4; 0 < x < 2), then into a cation-segregated phase (Li2O•FeO), and finally converting into metallic Fe and Li2O. Subsequent delithiation and lithiation processes involve interconversion between metallic Fe and FeO-like phases. Lastly, these results may offer new insights into the structure-determined ionic transport and electrochemical reactions in metal oxides, and those of other compounds sharing a ccp anion framework, reminiscent of magnetite.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Mesoscale Transport Properties (m2M)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704; SC0012673
OSTI ID:
1341518
Report Number(s):
BNL-111956-2016-JA; YN0100000
Journal Information:
Advanced Energy Materials, Vol. 6, Issue 10; ISSN 1614-6832
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 73 works
Citation information provided by
Web of Science

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The Systematic Refinement for the Phase Change and Conversion Reactions Arising from the Lithiation of Magnetite Nanocrystals journal November 2019
A Tunable 3D Nanostructured Conductive Gel Framework Electrode for High-Performance Lithium Ion Batteries journal March 2017
Rationalization of Diversity in Spinel MgFe 2 O 4 Surfaces journal September 2019
CuO Nanoplates for High‐Performance Potassium‐Ion Batteries journal July 2019
A critical review-promises and barriers of conversion electrodes for Li-ion batteries journal April 2017
Multi-electron transfer enabled by topotactic reaction in magnetite journal April 2019
FeMnO 3 : a high-performance Li-ion battery anode material journal January 2016
Size dependent behavior of Fe 3 O 4 crystals during electrochemical (de)lithiation: an in situ X-ray diffraction, ex situ X-ray absorption spectroscopy, transmission electron microscopy and theoretical investigation journal January 2017
High-performance NO 2 -gas sensing of ultrasmall ZnFe 2 O 4 nanoparticles based on surface charge transfer journal January 2019
Ab initio modeling and design of vanadia-based electrode materials for post-lithium batteries journal December 2019
Probing enhanced lithium-ion transport kinetics in 2D holey nanoarchitectured electrodes journal August 2018