skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Electrochemical (de)lithiation of silver ferrite and composites: mechanistic insights from ex situ, in situ, and operando X-ray techniques

Journal Article · · Physical Chemistry Chemical Physics. PCCP
DOI:https://doi.org/10.1039/C7CP04012A· OSTI ID:1376184
 [1];  [2];  [1];  [3];  [3];  [2];  [4];  [1];  [1];  [4];  [4];  [4]; ORCiD logo [5];  [6]; ORCiD logo [6]
  1. Stony Brook Univ., NY (United States). Dept. of Chemistry
  2. Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Energy Sciences Directorate
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  5. Stony Brook Univ., NY (United States). Dept. of Chemistry; Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering; Brookhaven National Lab. (BNL), Upton, NY (United States). Energy Sciences Directorate
  6. Stony Brook Univ., NY (United States). Dept. of Chemistry; Stony Brook Univ., NY (United States). Dept. of Materials Science and Engineering

Here, the structure of pristine AgFeO2 and phase makeup of Ag0.2FeO1.6 (a one-pot composite comprised of nanocrystalline stoichiometric AgFeO2 and amorphous γ-Fe2O3 phases) was investigated using synchrotron x-ray diffraction. A new stacking-fault model was proposed for AgFeO2 powder synthesized using the co-precipitation method. The lithiation/de-lithiation mechanisms of silver ferrite, AgFeO2 and Ag0.2FeO1.6 were investigated using ex-situ, in-situ, and operando characterization techniques. An amorphous γ-Fe2O3 component in the Ag0.2FeO1.6 sample is quantified. Operando XRD of electrochemically reduced AgFeO2 and Ag0.2FeO1.6 composites demonstrated differences in the structural evolution of the nanocrystalline AgFeO2 component. As complimentary techniques to XRD, ex-situ x-ray Absorption Spectroscopy (XAS) provided insight into the short-range structure of the (de)lithiated nanocrystalline electrodes, and a novel in-situ high energy x-ray fluorescence nanoprobe (HXN) mapping measurement was applied to spatially resolve the progression of discharge. Based on the results, a redox mechanism is proposed where the full reduction of Ag+ to Ag0 and partial reduction of Fe3+ to Fe2+ occur on reduction to 1.0 V, resulting in a Li1+yFeIIIFeIIyO2 phase. The Li1+yFeIIIFeIIyO2 phase can then reversibly cycle between Fe3+ and Fe2+ oxidation states, permitting good capacity retention over 50 cycles. In the Ag0.2FeO1.6 composite, a substantial amorphous γ-Fe2O3 component is observed which discharges to rock salt LiFe2O3 and Fe0 metal phase in the 3.5 – 1.0 V voltage range (in parallel with the AgFeO2 mechanism), and reversibly reoxidizes to a nanocrystalline iron oxide phase.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704; AC02-06CH11357
OSTI ID:
1376184
Report Number(s):
BNL-114168-2017-JA; PPCPFQ
Journal Information:
Physical Chemistry Chemical Physics. PCCP, Vol. 19, Issue 33; ISSN 1463-9076
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

References (62)

From β-Phase Particle to α-Phase Hexagonal-Platelet Superstructure over AgGaO 2 : Phase Transformation, Formation Mechanism of Morphology, and Photocatalytic Properties journal July 2010
Electrochemical Reduction of Silver Vanadium Phosphorus Oxide, Ag 2 VO 2 PO 4 : The Formation of Electrically Conductive Metallic Silver Nanoparticles journal October 2009
ATHENA , ARTEMIS , HEPHAESTUS : data analysis for X-ray absorption spectroscopy using IFEFFIT journal June 2005
Ultrasound assisted ambient temperature synthesis of ternary oxide AgMO2 (M=Fe, Ga) journal June 2009
Magnetosomes could be protective shields against metal stress in magnetotactic bacteria journal July 2020
XANES and EXAFS analysis of nano-size manganese dioxide as a cathode material for lithium-ion batteriesElectronic supplementary information (ESI) available: raw XAFS data; imaginary part of the FT; inverse FT. See http://www.rsc.org/suppdata/jm/b3/b315443b/ journal January 2004
Heterogeneous behaviour of the lithium battery composite electrode LiFePO4 journal May 2013
Zur Kenntnis der ?Ferrate(III)? M'FeO2 des einwertigen Ag, Cu und Tl journal August 1968
Surface-modified maghemite as the cathode material for lithium batteries journal October 2008
Impact of Multifunctional Bimetallic Materials on Lithium Battery Electrochemistry journal August 2016
Ab initio curved-wave x-ray-absorption fine structure journal September 1991
In situ visualization of Li/Ag2VP2O8 batteries revealing rate-dependent discharge mechanism journal January 2015
Effect of chemical oxidation for nano-size γ-Fe2O3 as lithium battery cathode journal February 2007
Silver vanadium phosphorous oxide, Ag2VO2PO4: Chimie douce preparation and resulting lithium cell electrochemistry journal August 2011
GSAS-II : the genesis of a modern open-source all purpose crystallography software package journal March 2013
Silver vanadium oxides and related battery applications journal October 2001
Transport properties and lithium insertion study in the p-type semi-conductors AgCuO2 and AgCu0.5Mn0.5O2 journal February 2009
Determination of crystallite size in a magnetic nanocomposite using extended x-ray absorption fine structure journal July 2003
Pushing the limits: an instrument for hard X-ray imaging below 20 nm journal January 2015
Oxygen intercalation of two polymorphs of CuScO2 journal August 2004
Hydrothermal Synthesis of Delafossite-Type Oxides journal March 2006
Solid-State Synthesis and Characterization of Silver Vanadium Oxide for Use as a Cathode Material for Lithium Batteries journal April 1994
Crystallographic data for pure crystalline silver ferrite journal March 1964
Chemistry of noble metal oxides. II. Crystal structures of platinum cobalt dioxide, palladium cobalt dioxide, coppper iron dioxide, and silver iron dioxide journal April 1971
Theoretical x-ray absorption fine structure standards journal July 1991
XLI. Precision measurements of crystal parameters journal February 1933
The crystal structure of a new hexagonal phase of AgFeO2 journal June 1972
Silver ferrite/maghemite composites and mixtures: Impact of one-pot composite preparation on battery-relevant electrochemistry journal March 2018
The lattice expansion of iron
  • Basinski, Zbigniew Stanislaw; Hume-Rothery, William; Sutton, A. L.
  • Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, Vol. 229, Issue 1179, p. 459-467 https://doi.org/10.1098/rspa.1955.0102
journal May 1955
Synthesis and characterization of nano silver ferrite composite journal July 2010
Operando X-ray Absorption Spectroscopy Study of Atomic Phase Reversibility with Wavelet Transform in the Lithium-Rich Manganese Based Oxide Cathode journal June 2016
Battery Relevant Electrochemistry of Ag 7 Fe 3 (P 2 O 7 ) 4 : Contrasting Contributions from the Redox Chemistries of Ag + and Fe 3+ journal October 2016
Polydopamine functionalized graphene/NiFe2O4 nanocomposite with improving Li storage performances journal May 2014
A General Recursion Method for Calculating Diffracted Intensities from Crystals Containing Planar Faults
  • Treacy, M. M. J.; Newsam, J. M.; Deem, M. W.
  • Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 433, Issue 1889 https://doi.org/10.1098/rspa.1991.0062
journal June 1991
Formation of AgFeO2, α-FeOOH, and Ag2O from mixed Fe(NO3)3–AgNO3 solutions at high pH journal July 2013
Hydrothermal Synthesis of Delafossite-Type Oxides journal January 2006
Hollow Iron Oxide Nanoparticles for Application in Lithium Ion Batteries journal April 2012
Nickel ferrite as a stable, high capacity and high rate anode for Li-ion battery applications journal January 2013
Physicochemical characterization of CuFeO2 and lithium intercalation journal February 2000
A facile bubble-assisted synthesis of porous Zn ferrite hollow microsphere and their excellent performance as an anode in lithium ion battery journal March 2013
Über Silberferrite. I. Mitteilung: Silberferrite aus Ortho- und Meta-Ferrihydroxyd journal April 1931
Probing the Li Insertion Mechanism of ZnFe 2 O 4 in Li-Ion Batteries: A Combined X-Ray Diffraction, Extended X-Ray Absorption Fine Structure, and Density Functional Theory Study journal May 2017
Conversion mechanisms of cobalt oxide anode for Li-ion battery: In situ X-ray absorption fine structure studies journal January 2015
The infrared dielectric properties of maghemite, ?-Fe2O3, from reflectance measurement on pressed powders journal February 1995
Electrochemical reduction of silver vanadium phosphorous oxide, Ag2VO2PO4: Silver metal deposition and associated increase in electrical conductivity journal October 2010
Enhanced electrochemical performances of CuCrO2–CNTs nanocomposites anodes by in-situ hydrothermal synthesis for lithium ion batteries journal September 2013
Synthesis and Electrochemistry of Silver Ferrite journal January 2011
Redox chemistry of a binary transition metal oxide (AB 2 O 4 ): a study of the Cu 2+ /Cu 0 and Fe 3+ /Fe 0 interconversions observed upon lithiation in a CuFe 2 O 4 battery using X-ray absorption spectroscopy journal January 2016
Comparison of extended x-ray absorption fine structure and Scherrer analysis of x-ray diffraction as methods for determining mean sizes of polydisperse nanoparticles journal December 2005
MnFe2O4–graphene nanocomposites with enhanced performances as anode materials for Li-ion batteries journal January 2013
Multimodality hard-x-ray imaging of a chromosome with nanoscale spatial resolution journal February 2016
High capacity and high rate capability of nanostructured CuFeO2 anode materials for lithium-ion batteries journal August 2011
Microwave synthesis of high-quality and uniform 4 nm ZnFe 2 O 4 nanocrystals for application in energy storage and nanomagnetics journal January 2016
Synthetic control of composition and crystallite size of silver ferrite composites: profound electrochemistry impacts journal January 2015
Nanocrystalline Iron Oxides Prepared via Co-Precipitation for Lithium Battery Cathode Applications journal August 2015
Electrochemical and In Situ XAFS-XRD Investigation of Nb[sub 2]O[sub 5] for Rechargeable Lithium Batteries journal January 2006
Crystallographic Data 186. Lithium journal December 1959
IFEFFIT  : interactive XAFS analysis and FEFF fitting journal March 2001
Theoretical approaches to x-ray absorption fine structure journal July 2000
11 nm hard X-ray focus from a large-aperture multilayer Laue lens journal December 2013
EXAFS as a tool to interrogate the size and shape of mono and bimetallic catalyst nanoparticles journal January 2010
An X‐Ray Study of the Wüstite (FeO) Solid Solutions journal January 1933