Hematite microdisks as an alternative anode material for lithium-ion batteries

Balasingam, Suresh Kannan; Kundu, Manab; Balakrishnan, Balamuralitharan; Kim, Heeje; Svensson, Ann Mari; Jayasayee, Kaushik

doi:10.1016/j.matlet.2019.03.058

Cited by 20 publications

(9 citation statements)

References 21 publications

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“…In the latest years, by virtue of its appealing properties (ubiquity, high abundance, low-cost, environmental friendliness, nontoxicity, good chemical stability, small energy band gap), hematite (α-Fe 2 O 3 ) has gained a position of relevance in the scenery of materials suitable for sustainable applications. It is utilized in a wide variety of fields transversally involving biomedics, − environmental remediation, − magnetic data-storage and spintronics, − sensing, − and energy conversion and storage. − …”

Section: Introductionmentioning

confidence: 99%

Structure, Defects, and Magnetism of Electrospun Hematite Nanofibers Silica-Coated by Atomic Layer Deposition

et al. 2020

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In the last years, hematite has been utilized in a plethora of applications. High aspect-ratio nanohematite and hematite/silica core–shell nanostructures are arousing growing interest for applications exploiting their magnetic properties. Atomic layer deposition (ALD) is utilized here to produce SiO2-coated α-Fe2O3 nanofibers (NFs) through two synthetic routes, viz. electrospinning/calcination/ALD or electrospinning/ALD/calcination. The number of ALD cycles (10–100) modulates the coating thickness, while the chosen route controls the final nanostructure. Porous and partially hollow NFs are produced. Their hierarchical structure and the nature and density of the lattice defects and strain are characterized by combining electron microscopy, diffraction, and spectroscopy techniques. The uncoated hematite NFs mostly have surface-related strain, which is attributed to oxygen vacancies/Fe2+ sites. ALD coating causes microstrain release and decrease of surface states. NFs calcined after ALD have extensive bulk strain, which is ascribed to the presence of dislocations throughout the volume of the NF grains. Bulk strain determines the remanent magnetization, whereas both surface and bulk strain influence the coercive field and the thermal behavior across the Morin temperature, including the magnetic memory effect. To the best of the authors’ knowledge, the correlation between lattice defects/strain and magnetic properties of SiO2-coated α-Fe2O3 NFs has never been reported before.

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Section: Introductionmentioning

confidence: 99%

Structure, Defects, and Magnetism of Electrospun Hematite Nanofibers Silica-Coated by Atomic Layer Deposition

et al. 2020

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“…The hematite electrode has a theoretical capacity of 1007 mAh g −1 , which is much greater than that of regular graphite [9]. Hematite electrodes have high electrochemical performance and cycle stability at 200 mA g −1 and 1000 mA g −1 with respect to the capacity at various applied current densities (ranging from 100 mA g −1 to 4000 mA g −1 ) [10]. A different expression demonstrates that hematite shows steady performance for 40 cycles.…”

Section: Introductionmentioning

confidence: 98%

Citric acid concentration tune of structural and magnetic properties in hematite (α−Fe₂O₃) nanoparticles synthesized by sol−gel method

Utari

Maulidina²,

Arilasita³

et al. 2023

Mater. Res. Express

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In this study, hematite (α-Fe2O3) nanoparticles were synthesized using the sol-gel method. The physical properties are modified by the citric acid concentration used as a fuel. The XRD results showed that the obtained sample had a rhombohedral (hexagonal) structure with space group R3c. The crystallite size calculated using the Scherer formula at the strongest peak was found to be 32.14, 24.58, and 23.21 nm with an increase in citric acid molarity of 0.3, 0.4, and 0.5, respectively. The absorption band in the FTIR spectrum shows the characteristics of hematite nanoparticles. Finally, the confirmed magnetic properties of the VSM data revealed a significant decrease in the coercive field, that is, 935, 610, and 548 Oe, as the citric acid concentration increased by 0.3, 0.4, and 0.4, respectively.

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“…Biomass is one of the abundant renewable sources on Earth, which plays an invaluable role in the development of sustainable biomass-derived carbon materials for high energy density LIB anodes. [7][8][9] In contrast to other anode materials such as silicon, tin and metal oxide, etc., biomass-derived carbon materials are used in LIBs owing to their low cost, environmental friendliness, easy availability, improved capaci-ties, cycle performance and stabilities/durability. [5,6] Biomassderived carbon materials have excellent energy storage abilities due to their tunable specific surface area, suitable porosity and pore radius distribution.…”

Section: Introductionmentioning

confidence: 99%

Lotus Root‐Derived Porous Carbon as an Anode Material for Lithium‐Ion Batteries

Luo

Teng

et al. 2022

ChemistrySelect

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When being used as anodes for lithium‐ion batteries (LIBs), environmental friendly and easily available biomass‐derived carbon materials often suffer from complex preparation conditions, underdeveloped pore structures and relatively low circulation capacities. In this context, three novel biomass‐derived porous carbon materials including LRK‐6, LRK‐7 and LRK‐8 sourced from lotus roots are activated and carbonized by a simple method. The prepared material has a three‐dimensional honeycomb structure. The effects of carbonization temperature on the structure, morphology and electrochemical properties of the material are investigated in detail. Owing to its high specific surface area (831.017 m2 g−1), appropriate microporous content (0.217 cm3 g−1) and the highest mesopore capacity (0.325 cm3 g−1) together with suitable doping of N and O atoms, the as‐optimized LRK‐7 material shows a reversible specific capacity of 725.25 mAh g−1 after 100 cycles at 0.1 A g−1 and 614.60 mAh g−1 after 223 cycles at 0.3 A g−1. Besides, LRK‐7 material also exhibits high rate performance, achieving a capacity of 153.5 mAh g−1 at 9.0 A g−1. The results verify that the application of LRK‐7 as a potential anode material in the LIB will embrace a bright future.

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Hematite microdisks as an alternative anode material for lithium-ion batteries

Cited by 20 publications

References 21 publications

Structure, Defects, and Magnetism of Electrospun Hematite Nanofibers Silica-Coated by Atomic Layer Deposition

Structure, Defects, and Magnetism of Electrospun Hematite Nanofibers Silica-Coated by Atomic Layer Deposition

Citric acid concentration tune of structural and magnetic properties in hematite (α−Fe₂O₃) nanoparticles synthesized by sol−gel method

Lotus Root‐Derived Porous Carbon as an Anode Material for Lithium‐Ion Batteries

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Hematite microdisks as an alternative anode material for lithium-ion batteries

Cited by 20 publications

References 21 publications

Structure, Defects, and Magnetism of Electrospun Hematite Nanofibers Silica-Coated by Atomic Layer Deposition

Structure, Defects, and Magnetism of Electrospun Hematite Nanofibers Silica-Coated by Atomic Layer Deposition

Citric acid concentration tune of structural and magnetic properties in hematite (α−Fe2O3) nanoparticles synthesized by sol−gel method

Lotus Root‐Derived Porous Carbon as an Anode Material for Lithium‐Ion Batteries

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Citric acid concentration tune of structural and magnetic properties in hematite (α−Fe₂O₃) nanoparticles synthesized by sol−gel method