Nanocrystalline Iron Oxides Prepared via Co-Precipitation  for Lithium Battery Cathode Applications

Durham, Jessica L.; Takeuchi, Esther S.; Marschilok, Amy C.; Takeuchi, Kenneth J.

doi:10.1149/06609.0111ecst

Cited by 5 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two common strategies have been employed to circumvent the aforementioned limitations with the goal of generating Fe 3 O 4 anodes with an improved rate capability and cycling stability. One protocol embodies the size optimization of Fe 3 O 4 to improve the Li-ion diffusion and electron transport within the nanoparticles. ,, The other main approach has been to introduce conductive additives, such as carbon nanofibers, graphene, carbon nanotubes (CNTs), and conducting polymers, to not only enhance the overall electrical conductivity but also to accommodate the large volume change during the cycling of electrodes. Despite the improvement of the electron and ion conductivity induced by the incorporation of carbon additives, the volumetric capacity of the composite electrode remains low.…”

Section: Introductionmentioning

confidence: 99%

Deliberate Modification of Fe₃O₄ Anode Surface Chemistry: Impact on Electrochemistry

Wang

Housel

Bock

et al. 2019

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Fe 3 O 4 nanoparticles (NPs) with an average size of 8−10 nm have been successfully functionalized with various surface-treatment agents to serve as model systems for probing surface chemistry-dependent electrochemistry of the resulting electrodes. The surface-treatment agents used for the functionalization of Fe 3 O 4 anode materials were systematically varied to include aromatic or aliphatic structures: 4-mercaptobenzoic acid, benzoic acid (BA), 3-mercaptopropionic acid, and propionic acid (PA). Both structural and electrochemical characterizations have been used to systematically correlate the electrode functionality with the corresponding surface chemistry. Surface treatment with ligands led to better Fe 3 O 4 dispersion, especially with the aromatic ligands. Electrochemistry was impacted where the PA-and BA-treated Fe 3 O 4 systems without the −SH group demonstrated a higher rate capability than their thiol-containing counterparts and the pristine Fe 3 O 4 . Specifically, the PA system delivered the highest capacity and cycling stability among all samples tested. Notably, the aromatic BA system outperformed the aliphatic PA counterpart during extended cycling under high current density, due to the improved charge transfer and ion transport kinetics as well as better dispersion of Fe 3 O 4 NPs, induced by the conjugated system. Our surface engineering of the Fe 3 O 4 electrode presented herein, highlights the importance of modifying the structure and chemistry of surface-treatment agents as a plausible means of enhancing the interfacial charge transfer within metal oxide composite electrodes without hampering the resulting tap density of the resulting electrode.

show abstract

Section: Introductionmentioning

confidence: 99%

Deliberate Modification of Fe₃O₄ Anode Surface Chemistry: Impact on Electrochemistry

Wang

Housel

Bock

et al. 2019

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…Because of the strong interaction between Fe 3 O 4 and GO, the proposed synthetic mechanism is described as the following: Fe 2+ /Fe 3+ ions cause a slight change of pH value of the GO suspension and then coordinate with carboxyl and hydroxyl groups on the GO surface. When the mixture is dropped into tetraethylammonium (TEA) solution, nanocrystalline Fe 3 O 4 precipitates directly on GO nanosheets, affording robust Fe 3 O 4 /GO microsheets. , …”

mentioning

confidence: 99%

“…When the mixture is dropped into tetraethylammonium (TEA) solution, nanocrystalline Fe 3 O 4 precipitates directly on GO nanosheets, affording robust Fe 3 O 4 /GO microsheets. 27,28 After the anisotropic ice crystal growth and subsequent sublimation process, aligned porous channels are constructed on the Cu foil current collectors as shown in Figure 2c−g. From the top view of the porous electrode (Figure 2d,e), lamellar walls mainly composed of Fe 3 O 4 /GO are well aligned with an average spacing between 10 and 20 μm.…”

mentioning

confidence: 99%

Promoting Transport Kinetics in Li-Ion Battery with Aligned Porous Electrode Architectures

et al. 2019

View full text Add to dashboard Cite

Developing scalable energy storage systems with high energy and power densities is essential to meeting the ever-growing portable electronics and electric vehicle markets, which calls for development of thick electrode designs to improve the active material loading and greatly enhance the overall energy density. However, rate capabilities in lithium-ion batteries usually fall off rapidly with increasing electrode thickness due to hindered ionic transport kinetics, which is especially the issue for conversion-based electroactive materials. To alleviate the transport constrains, rational design of three-dimensional porous electrodes with aligned channels is critically needed. Herein, magnetite (Fe3O4) with high theoretical capacity is employed as a model material, and with the assistance of micrometer-sized graphine oxide (GO) sheets, aligned Fe3O4/GO (AGF) electrodes with well-defined ionic transport channels are formed through a facile ice-templating method. The as-fabricated AGF electrodes exhibit excellent rate capacity compared with conventional slurry-casted electrodes with an areal capacity of ∼3.6 mAh·cm–2 under 10 mA·cm–2. Furthermore, clear evidence provided by galvanostatic charge–discharge profiles, cyclic voltammetry, and symmetric cell electrochemical impedance spectroscopy confirms the facile ionic transport kinetics in this proposed design.

show abstract

“…Specifically, nanocrystalline Fe 3 O 4 with an average diameter of ∼8 nm yielded approximately a 100% enhancement in capacity as compared with that found for ∼26 nm magnetite nanomaterials above 1.2 V during constant current discharge, though the Fe n+ oxidation state difference would have predicted only a 10% increase. 12 The other main approach has been to introduce conductive agents, such as carbon nanofibers, graphene, and carbon nanotubes (CNTs), in order to enhance the overall electronic conductivity and to accommodate for the large volume change. Specifically, CNTs have been extensively studied as conductive additives in light of their high aspect ratios and proven superior mechanical and electrical properties (including favorable ballistic transport).…”

mentioning

confidence: 99%

Correlating Preparative Approaches with Electrochemical Performance of Fe₃O₄-MWNT Composites Used as Anodes in Li-Ion Batteries

Wang

et al. 2017

ECS J. Solid State Sci. Technol.

View full text Add to dashboard Cite

Fe 3 O 4 nanoparticles (NPs) with an average size of 8-10 nm and a loading ratio of 50 wt% have been successfully attached onto the external surfaces of multi-walled carbon nanotubes (MWNTs) by means of three different preparative approaches, namely a sonication method, a covalent attachment protocol, as well as a non-covalent π-π interaction strategy. Specifically, the Fe 3 O 4 NPs associated with the sonication method lie directly on the outer surfaces of the MWNTs. Particles covalently attached onto the MWNTs formed amide chemical bonds through the mediation of the amorphous (3-aminopropyl) triethoxysilane (APTES) linker. Finally, particles were anchored non-covalently onto the underlying conjugated MWNTs via an aromatic 4-mercaptobenzoic acid (4-MBA) linker. Both structural and electrochemical characterization protocols have been used to systematically correlate the electrode performance with the corresponding attachment strategies. Fe 3 O 4 -MWNT composites generated by the π-π interaction strategy delivered 813, 768, 729, 796, 630, 580, 522, and 762 mAh/g under rates of 200, 400, 800, 100, 1200, 1600, 2000, and 100 mA/g, with 72% retention between cycles 2 and 80, demonstrating both higher capacity and better cycling stability as compared with analogues derived from the physical sonication as well as covalent attachment strategies. This finding may be attributed to the enhanced charge and ion transport coupled with retention of physical contact with the underlying MWNTs after a large volume change during cycling. Our collective results suggest that the non-covalent π-π attachment modality is a more effective preparative strategy for enhancing the performance of MWNT-Fe 3 O 4 composite electrodes after a full discharge process. Lithium ion battery (LIB) applications have experienced significant growth over the past two decades. Today LIBs are widely used and denote the battery of choice for a wide range of applications spanning from portable electronics to electric vehicles.1-5 Although LIBs have shown impressive commercial success, an understanding of the intrinsic functioning of LIB electrodes and of their constituent component materials still represents a subject of significant research. In recent years, the use of energy storage devices has expanded into new areas, including with uninterrupted power sources (UPS), stationary storage batteries (SSBs), and the automotive market, the latter of which encompasses both electric vehicles and hybrid electric vehicles. Hence, the development of LIBs based upon the use of lower cost and more earth abundant materials embodies a highly desirable objective.As an electroactive material, the inverse spinel structure of magnetite (Fe 3 O 4 ) epitomizes a particularly promising candidate for an anode material in LIB, due to its (i) significantly larger reversible capacity (i.e. 926 mAh g −1 , when reacting with eight lithium equivalents), (ii) plentiful earth abundance, and (iii) relative non-toxicity.

show abstract

Nanocrystalline Iron Oxides Prepared via Co-Precipitation for Lithium Battery Cathode Applications

Cited by 5 publications

References 11 publications

Deliberate Modification of Fe₃O₄ Anode Surface Chemistry: Impact on Electrochemistry

Deliberate Modification of Fe₃O₄ Anode Surface Chemistry: Impact on Electrochemistry

Promoting Transport Kinetics in Li-Ion Battery with Aligned Porous Electrode Architectures

Correlating Preparative Approaches with Electrochemical Performance of Fe₃O₄-MWNT Composites Used as Anodes in Li-Ion Batteries

Contact Info

Product

Resources

About

Nanocrystalline Iron Oxides Prepared via Co-Precipitation for Lithium Battery Cathode Applications

Cited by 5 publications

References 11 publications

Deliberate Modification of Fe3O4 Anode Surface Chemistry: Impact on Electrochemistry

Deliberate Modification of Fe3O4 Anode Surface Chemistry: Impact on Electrochemistry

Promoting Transport Kinetics in Li-Ion Battery with Aligned Porous Electrode Architectures

Correlating Preparative Approaches with Electrochemical Performance of Fe3O4-MWNT Composites Used as Anodes in Li-Ion Batteries

Contact Info

Product

Resources

About

Deliberate Modification of Fe₃O₄ Anode Surface Chemistry: Impact on Electrochemistry

Deliberate Modification of Fe₃O₄ Anode Surface Chemistry: Impact on Electrochemistry

Correlating Preparative Approaches with Electrochemical Performance of Fe₃O₄-MWNT Composites Used as Anodes in Li-Ion Batteries