Pseudocapacitive vs diffusion controlled charge storage in Fe2O3 nanosheet Na-ion battery

Vincent, Mewin; Kumar, Sandra Sajeev; Kowalski, Damian

doi:10.1016/j.electacta.2023.143161

Cited by 8 publications

(3 citation statements)

References 43 publications

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“…The rate capability and cycle stability were evaluated by varying currents between 0.04 and 2 mA cm –2 . In situ Raman spectroscopy measurements were carried out using the in situ Raman ECC-OPTO cell (El-cell) in which the electrodes were facing upward to a borosilicate glass window; before the experiment, the cell was calibrated with a sapphire optical window to ensure the match of the spectra. Raman spectra were collected using a Thermo Scientific DXR3 Raman microscope fitted with a 532 nm laser.…”

Section: Experimental Sectionmentioning

confidence: 99%

Lithiation of Anodic Magnetite–Hematite Nanotubes Formed on Iron

Fadillah,

Kowalski,

Vincent

et al. 2023

ACS Appl. Mater. Interfaces

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Electrochemically active iron oxide nanotubes formed by anodization are of high interest as battery components in various battery systems due to their 1D geometry, offering high volume expansion tolerance and applications without the use of binders and conductive additives. This work takes a step forward toward understanding lithium-ion storage in 1D nanotubes through the analysis of differential capacity plots d(Q – Q 0)·dE –1 supported by in situ Raman spectroscopy observations. The iron oxide nanotubes were synthesized by anodizing polycrystalline iron and subsequently modified by thermal treatment in order to control the degree of crystallinity and the ratio of hematite (Fe2O3) to magnetite (Fe3O4). The electrochemical fingerprints revealed a quasi-reversible lithiation/delithiation process through Li2O formation. Significant improvement in electrochemical performance was found to be related to the high degree of crystallinity and the increase of the hematite (Fe2O3) to magnetite (Fe3O4) ratio. In situ mechanistic studies revealed a reversible reduction of iron oxide to metallic iron simultaneously with Li2O formation.

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Section: Experimental Sectionmentioning

confidence: 99%

Lithiation of Anodic Magnetite–Hematite Nanotubes Formed on Iron

Fadillah,

Kowalski,

Vincent

et al. 2023

ACS Appl. Mater. Interfaces

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“…This is not optimistic for building cost-effective energy storage systems on a large scale [3][4][5]. Sodium-ion batteries are considered a competitive alternative to address the inherent limitations of lithium in terms of sustainability due to abundant economic sodium resources, reduced collector costs, and intercalation chemistry like LIB [6,7]. Compared to lithium ions (0.76 Å), Na ions (1.02 Å) with larger radii require a more open and stable frame structure to accommodate ion intercalation/extraction [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Na4Fe3(PO4)2(P2O7)@C/Ti3C2Tx Hybrid Cathode Materials with Enhanced Performances for Sodium-Ion Batteries

Xiang,

Shi,

Chen

et al. 2024

Batteries

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Developing cost-effective cathode materials is conducive to accelerating the commercialization of sodium-ion batteries. Na4Fe3(PO4)2P2O7 (NFPP) has attracted extensive attention owning to its high theoretical capacity, stable structure, and low cost of raw materials. However, its inherent low conductivity hinders its further application. Herein, carbon-coated NFPP nanospheres are anchored to crumpled MXene nanosheets by an electrostatic self-assembly; this cross-linked structure induced by CTAB not only significantly expands the contact area between particles and improves the electronic conductivity, but also effectively reduces the aggregation of NFPP nanoparticles. The as-designed Na4Fe3(PO4)2(P2O7)@C/Ti3C2Tx (NFPP@MX) cathode exhibits a high discharge capacity (106.1 mAh g−1 g at 0.2 C), good rate capability (60.4 mAh g−1 at 10 C), and a long-life cyclic stability (85.2% capacity retention after 1000 cycles at 1 C). This study provides an effective strategy for the massive production of high-performance NFPP cathodes and broadens the application of MXene in the modification of other cathode materials.

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“…The origin of superior rate capability and cycling performance at 5 C rate was investigated by distinguishing between diffusion-controlled and surface capacitive components in determining the capacity. , Research has indicated that two predominant energy storage mechanisms function simultaneously in batteries: diffusion-controlled and surface capacitive processes. These mechanisms have been instrumental in enabling reversible capacities that surpass theoretical limits in metal oxide electrodes, which are typically based on conventional conversion reactions.…”

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confidence: 99%

Inducing and Understanding Pseudocapacitive Behavior in an Electrophoretically Deposited Lithium Iron Phosphate Li-Metal Battery as an Electrochemical Test Platform

Lee,

Park

2024

J. Phys. Chem. Lett.

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Our study has effectively employed electrophoretic deposition (EPD) using AC voltage to develop a lithium iron phosphate (LFP) Li-ion battery featuring pseudocapacitive properties and improved high C-rate performance. This method has significantly improved the battery's specific capacity, achieving an impressive 100 mAhg-1 at a 5 C discharge rate, which showcases its superior high-rate capability. Additionally, the battery displayed excellent reversibility during its performance cycles. These results confirm the EPD method's efficacy in improving LFP electrode performance, yielding notable improvements in cycling stability and high-rate capability. The enhanced capacity and high-rate performance of the electrophoretic-deposited LFP electrodes are largely due to the fast kinetics facilitated by pseudocapacitive behavior-induced charge storage and a high Li-ion diffusion constant measured in our EPD-deposited LFP electrodes. This underscores the practicality of our approach and the development of a fundamental test platform to investigate the pseudocapacitive charge storage mechanism in electrodes with typical battery-like behavior.

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Pseudocapacitive vs diffusion controlled charge storage in Fe2O3 nanosheet Na-ion battery

Cited by 8 publications

References 43 publications

Lithiation of Anodic Magnetite–Hematite Nanotubes Formed on Iron

Lithiation of Anodic Magnetite–Hematite Nanotubes Formed on Iron

Na4Fe3(PO4)2(P2O7)@C/Ti3C2Tx Hybrid Cathode Materials with Enhanced Performances for Sodium-Ion Batteries

Inducing and Understanding Pseudocapacitive Behavior in an Electrophoretically Deposited Lithium Iron Phosphate Li-Metal Battery as an Electrochemical Test Platform

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