Fe<sub>3</sub>O<sub>4</sub> Nanoparticles Confined in Mesocellular Carbon Foam for High Performance Anode Materials for Lithium‐Ion Batteries

Kang, Eunae; Jung, Yoon Seok; Cavanagh, Andrew S.; Kim, Gi Heon; George, Steven M.; Dillon, Anne C.; Kim, Jin Kon; Lee, Jinwoo

doi:10.1002/adfm.201002576

Cited by 417 publications

(290 citation statements)

References 53 publications

Supporting

Mentioning

282

Contrasting

Order By: Relevance

“…The rate capabilities of LiMnPO 4 /C and LiCoPO 4 /C are significantly poorer compared with the LiFePO 4 , which may be explained by the difference in intrinsic material properties, such as the miscibility gap. The electrochemical properties of the LiMnPO 4 /C core−shell nanocomposite is better than LiMnPO 4 /C particles (30 nm), 42 nanometric LiMnPO 4 , 43 LiMnPO 4 nanoplate, 44 and carboncoated LiMnPO 4 . 45 The improved electrochemical performance may be attributed to small LiMnPO 4 core coated with a uniform carbon shell.…”

mentioning

confidence: 95%

“…Compared to graphite, spinel Li 4 Ti 5 O 12 (LTO) exhibits a relatively high lithium insertion/extraction voltage of approximately 1.55 V (vs Li/Li + ), which circumvents the formation of the SEI and suppress lithium dendrite deposition on the surface of the anode. 12−14 As a zero-strain insertion material, LTO possesses excellent reversibility and excellent Li-ion mobility in the charge−discharge process.…”

mentioning

confidence: 99%

“…Unlike conventional solid-state processes where only micrometer-sized electroactive materials are obtained, our new strategy for fabrication of nanosized electroactive materials with the core−shell structure is briefly described in Scheme 1a. For the fabrication of nanosized Li 4 Ti 5 O 12 /carbon (N-LTO/C), TiO(acac) 2 was used as the titania and single-source carbon and mixed with the lithium salt Li 2 CO 3 . The precursor was then treated by solid-state reaction.…”

mentioning

confidence: 99%

“…The optimal core−shell nanostructure ensures the effective ambipolar diffusion of Li + and e − into and out of the LTO nanocrystalline structure (Scheme 1b, right) regardless of the electrical conductivity. Microsized Li 4 Ti 5 O 12 (M-LTO) prepared by a conventional approach is typically only covered with a partial coating of carbon (Supporting Information, Figure S1). The effective reaction area is limited as electrons cannot reach all the positions where lithium ion insertion takes place, thus resulting in poor rate performance (Scheme 1b, left).…”

mentioning

confidence: 99%

“…The cell retained ∼95% of its initial capacity after 1000 cycles at the high 10 C rate. The superior cycling performance can be attributed to the structural stability of Li 4 Ti 5 O 12 and the rapid ionic and electronic conduction in the electrode due to the carbon nanocoating. The electrochemical performance of N-LTO/C core−shell nanostructures is much better than that of nanostructured LTO, 39 partially carbon-coated LTO, 9 doped LTO, 40 and LTO-graphene composites.…”

mentioning

confidence: 99%

See 4 more Smart Citations

General Strategy for Designing Core–Shell Nanostructured Materials for High-Power Lithium Ion Batteries

et al. 2012

View full text Add to dashboard Cite

Because of its extreme safety and outstanding cycle life, Li 4 Ti 5 O 12 has been regarded as one of the most promising anode materials for next-generation high-power lithium-ion batteries. Nevertheless, Li 4 Ti 5 O 12 suffers from poor electronic conductivity. Here, we develop a novel strategy for the fabrication of Li 4 Ti 5 O 12 /carbon core−shell electrodes using metal oxyacetyl acetonate as titania and single-source carbon. Importantly, this novel approach is simple and general, with which we have successfully produce nanosized particles of an olivine-type LiMPO 4 (M = Fe, Mn, and Co) core with a uniform carbon shell, one of the leading cathode materials for lithium-ion batteries. Metal acetylacetonates first decompose with carbon coating the particles, which is followed by a solid state reaction in the limited reaction area inside the carbon shell to produce the LTO/C (LMPO 4 /C) core−shell nanostructure. The optimum design of the core−shell nanostructures permits fast kinetics for both transported Li + ions and electrons, enabling high-power performance. KEYWORDS: Lithium ion batteries, Li 4 Ti 5 O 12 , lithium metal phosphates, core−shell structures, anode, cathode L ithium-ion batteries (LIBs), dominating the portable power market, have attracted enormous attention in the last several years for large-scale battery applications, such as electric vehicles (EV) and hybrid electric vehicles (HEV). 1,2 However, further improvements in terms of power densities, safety, and lifetime require new materials or new structures with a higher storage capacity and faster charge and discharge rate and desired potentials. 3−6 Graphitic carbon is commonly used as an anode in commercial LIBs but exhibits poor rate performance due to its low Li diffusion coefficient and presents serious safety issues because of potential solid electrolyte interphase (SEI) film formation. 7−10 As for cathode materials, lithium transition metal oxides suffer from the intrinsic disadvantage of poor thermal stability due to the release of oxygen from the highly delithiated oxide materials. 11 Advanced materials with better safety and excellent rate capability are critical components for the next generation of LIBs.Compared to graphite, spinel Li 4 Ti 5 O 12 (LTO) exhibits a relatively high lithium insertion/extraction voltage of approximately 1.55 V (vs Li/Li + ), which circumvents the formation of the SEI and suppress lithium dendrite deposition on the surface of the anode. 12−14 As a zero-strain insertion material, LTO possesses excellent reversibility and excellent Li-ion mobility in the charge−discharge process. 15−17 As a cathode material, olivine-type LiMPO 4 (M = Fe, Mn, Co, and Ni) compounds which display high Li-ion mobility, superior safety properties, and high electrochemical and thermal stability. 18−23 Therefore, a LiMPO 4 /LTO cell system possessing unique properties would enable a promising rechargeable batteries for large-scale application.However, both materials suffer from poor electronic conductivity (for example: ...

show abstract

mentioning

confidence: 95%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

General Strategy for Designing Core–Shell Nanostructured Materials for High-Power Lithium Ion Batteries

et al. 2012

View full text Add to dashboard Cite

show abstract

TEM and Associated Techniques

Prozorov

2016

Iron Oxides

View full text Add to dashboard Cite

Common Abbreviations ADF annular dark field AEM analytical electron microscopy BF bright field CCD charge-coupled device CCF cross-correlated function DF dark field DP diffraction pattern EELS electron energy-loss spectrometry EFI energy-filtered imaging EFTEM energy-filtered transmission electron microscopy EH electron holography ELNES energy-loss near-edge structure ETEM environmental transmission electron microscopy eV electron volt EXAFS extended X-ray absorption fine structure FEG field-emission electron gun FFT fast Fourier transform FIB focused ion beam FM fluorescence microscopy GIF Gatan Imaging filter TM HAADF high-angle annular dark field HRTEM high-resolution transmission electron microscopy HV high vacuum LC liquid cell MC minimum contrast MS multiple scattering MV megavolt PB phase boundary P/B peak to background ratio Iron Oxides: From Nature to Applications, First Edition. Edited by Damien Faivre.

show abstract

Atomic Layer Deposition for Thin‐Film Lithium‐Ion Batteries

Nilsen

Gandrud

Ruud

et al. 2017

Atomic Layer Deposition in Energy Conversion Applications

View full text Add to dashboard Cite

Fe₃O₄ Nanoparticles Confined in Mesocellular Carbon Foam for High Performance Anode Materials for Lithium‐Ion Batteries

Cited by 417 publications

References 53 publications

General Strategy for Designing Core–Shell Nanostructured Materials for High-Power Lithium Ion Batteries

General Strategy for Designing Core–Shell Nanostructured Materials for High-Power Lithium Ion Batteries

TEM and Associated Techniques

Atomic Layer Deposition for Thin‐Film Lithium‐Ion Batteries

Contact Info

Product

Resources

About

Fe3O4 Nanoparticles Confined in Mesocellular Carbon Foam for High Performance Anode Materials for Lithium‐Ion Batteries

Cited by 417 publications

References 53 publications

General Strategy for Designing Core–Shell Nanostructured Materials for High-Power Lithium Ion Batteries

General Strategy for Designing Core–Shell Nanostructured Materials for High-Power Lithium Ion Batteries

TEM and Associated Techniques

Atomic Layer Deposition for Thin‐Film Lithium‐Ion Batteries

Contact Info

Product

Resources

About

Fe₃O₄ Nanoparticles Confined in Mesocellular Carbon Foam for High Performance Anode Materials for Lithium‐Ion Batteries