Hollow versus nonhollow: The electrochemical preference in a case study of the conversion reaction of Fe3O4

Kim, Tae-Hee; Song, Hyun‐Kon

doi:10.1016/j.electacta.2013.04.134

Cited by 11 publications

(5 citation statements)

References 40 publications

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“…Metal oxides are of interest due to their high capacity; this is because their conversion reactions, in which the metal oxides are converted to metal along with the formation of Li 2 O. These conversion reactions use multiple oxidation states of metal during electrochemical reactions. − Recent studies by Tirado’s group introduced various metal oxalates, MC 2 O 4 (M: Mn, Fe, Co, Ni, Sn, Cu, Zn), as possible alternatives to graphite for use as high-capacity anode materials. − The related reaction is also a conversion process via the formation of metal and Li 2 C 2 O 4 when discharged (reduced): MC 2 O 4 + 2Li + + 2e – → M + Li 2 C 2 O 4 . Very recently, we verified the formation of Li 2 C 2 O + and metal during discharge by means of time-of-flight secondary ion mass spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Electrochemical Reaction of Tin Oxalate-Reduced Graphene Oxide Composite Anode for Rechargeable Lithium Batteries

Park

Yashiro

et al. 2017

ACS Appl. Mater. Interfaces

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Unlike for SnO, few studies have reported on the use of SnCO as an anode material for rechargeable lithium batteries. Here, we first introduce a SnCO-reduced graphene oxide composite produced via hydrothermal reactions followed by a layer-by-layer self-assembly process. The addition of rGO increased the electric conductivity up to ∼10 S cm. As a result, the SnCO-reduced graphene oxide electrode exhibited a high charge (oxidation) capacity of ∼1166 mAh g at a current of 100 mA g (0.1 C-rate) with a good retention delivering approximately 620 mAh g at the 200th cycle. Even at a rate of 10 C (10 A g), the composite electrode was able to obtain a charge capacity of 467 mAh g. In contrast, the bare SnCO had inferior electrochemical properties relative to those of the SnCO-reduced graphene oxide composite: ∼643 mAh g at the first charge, retaining 192 mAh g at the 200th cycle and 289 mAh g at 10 C. This improvement in electrochemical properties is most likely due to the improvement in electric conductivity, which enables facile electron transfer via simultaneous conversion above 0.75 V and de/alloy reactions below 0.75 V: SnCO + 2Li + 2e → Sn + LiCO + xLi + xe → LiSn on discharge (reduction) and vice versa on charge. This was confirmed by systematic studies of ex situ X-ray diffraction, transmission electron microscopy, and time-of-flight secondary-ion mass spectroscopy.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Electrochemical Reaction of Tin Oxalate-Reduced Graphene Oxide Composite Anode for Rechargeable Lithium Batteries

Park

Yashiro

et al. 2017

ACS Appl. Mater. Interfaces

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“…Overall, this hierarchical porous structure may be beneficial to both the infiltration of electrolyte ions and their transport kinetics. 49 Raman spectra (Figure 1e) were collected to examine the phase purity of the monoclinic TNO. For the pristine TNO, which was formed by annealing the precursor at 750 °C in air, its two bands centered at 894 and 1003 cm −1 arise from the vibrational modes of corner-and edge-shared NbO 6 octahedra, respectively.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Intensified Energy Storage in High-Voltage Nanohybrid Supercapacitors via the Efficient Coupling between TiNb₂O₇/Holey-rGO Nanoarchitectures and Ionic Liquid-Based Electrolytes

Liu

Zhang

Xing

et al. 2021

ACS Appl. Mater. Interfaces

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Obtaining a comprehensive understanding of the energy storage mechanisms, interface compatibility, electrode− electrolyte coupling, and synergistic effects in carefully programmed nanoarchitectural electrodes and complicated electrolyte systems will provide a shortcut for designing better supercapacitors. Here, we report the intrinsic relationships between the electrochemical performances and microstructures or composition of complex nanoarchitectures and formulated electrolytes. We observed that isolated TiNb 2 O 7 nanoparticles provided both a Faradaic intercalation contribution and a surface pseudocapacitance. The holey graphenes partitioned by nanoparticles not only fostered the fast transport of both electrons and ions but also provided additional electrical double-layer capacitance. The charge contributions from the diffusion-controlled intercalation process and capacitive behaviors, double-layer charging, and pseudocapacitance, were quantitatively distinguished in different electrolytes including a formulated ionic-liquid mixture, various nanocomposite ionogel electrolytes, and an organic LiPF 6 electrolyte. A steered molecular dynamics simulation method was used to unveil the underlying principles governing the high-rate capability of holey nanoarchitectures. High energy density and high rate capability in solid-state supercapacitors were achieved using the Faradaic contributions from the lithium-ion insertion process and its surface charge-transfer process in combination with the non-Faradaic contribution from the double-layer effects. The work suggests that practical high-voltage supercapacitors with programmed performances and high safety can be realized via the efficient coupling between emerging nanoarchitectural electrodes and formulated high-voltage electrolytes.

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“…These above analyses imply that this nanoarchitecture is a good option for obtaining an anode with a high rate capability. Overall, this hierarchical porous structure may be beneficial to both the infiltration of electrolyte ions and their transport kinetics [49]. Raman spectra (Figure 1e) were collected to examine the phase purity of the monoclinic TNO.…”

Section: Resultsmentioning

confidence: 99%

Correction to “Intensified Energy Storage in High-Voltage Nanohybrid Supercapacitors via the Efficient Coupling between TiNb₂O₇/Holey-rGO Nanoarchitectures and Ionic Liquid-Based Electrolytes”

Liu¹,

Zhang²,

Xing³

et al. 2021

ACS Appl. Mater. Interfaces

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Hollow versus nonhollow: The electrochemical preference in a case study of the conversion reaction of Fe3O4

Cited by 11 publications

References 40 publications

Synthesis and Electrochemical Reaction of Tin Oxalate-Reduced Graphene Oxide Composite Anode for Rechargeable Lithium Batteries

Synthesis and Electrochemical Reaction of Tin Oxalate-Reduced Graphene Oxide Composite Anode for Rechargeable Lithium Batteries

Intensified Energy Storage in High-Voltage Nanohybrid Supercapacitors via the Efficient Coupling between TiNb₂O₇/Holey-rGO Nanoarchitectures and Ionic Liquid-Based Electrolytes

Correction to “Intensified Energy Storage in High-Voltage Nanohybrid Supercapacitors via the Efficient Coupling between TiNb₂O₇/Holey-rGO Nanoarchitectures and Ionic Liquid-Based Electrolytes”

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Hollow versus nonhollow: The electrochemical preference in a case study of the conversion reaction of Fe3O4

Cited by 11 publications

References 40 publications

Synthesis and Electrochemical Reaction of Tin Oxalate-Reduced Graphene Oxide Composite Anode for Rechargeable Lithium Batteries

Synthesis and Electrochemical Reaction of Tin Oxalate-Reduced Graphene Oxide Composite Anode for Rechargeable Lithium Batteries

Intensified Energy Storage in High-Voltage Nanohybrid Supercapacitors via the Efficient Coupling between TiNb2O7/Holey-rGO Nanoarchitectures and Ionic Liquid-Based Electrolytes

Correction to “Intensified Energy Storage in High-Voltage Nanohybrid Supercapacitors via the Efficient Coupling between TiNb2O7/Holey-rGO Nanoarchitectures and Ionic Liquid-Based Electrolytes”

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Intensified Energy Storage in High-Voltage Nanohybrid Supercapacitors via the Efficient Coupling between TiNb₂O₇/Holey-rGO Nanoarchitectures and Ionic Liquid-Based Electrolytes

Correction to “Intensified Energy Storage in High-Voltage Nanohybrid Supercapacitors via the Efficient Coupling between TiNb₂O₇/Holey-rGO Nanoarchitectures and Ionic Liquid-Based Electrolytes”