Electrochemical properties of titanium fluoride with high rate capability for lithium-ion batteries

Kitajou, Ayuko; Eguchi, K.; Ishado, Yuji; Setoyama, Hiroyuki; Okajima, Toshihiro; Okada, Shigeto

doi:10.1016/j.jpowsour.2019.02.056

Cited by 12 publications

(16 citation statements)

References 13 publications

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“…10,11 Most conversion materials are based on metal fluorides such as FeF3, NiF3, CoF3, MnF3, and TiF3 with particular focus on iron fluorides due to the low cost of iron sources. [12][13][14][15][16][17] Extensive studies on FeF3 have reported a high theoretical capacity of 712 mAh g −1 attained from three-electron insertion/extraction and conversion reactions, with several paths for tracking the structural and chemical evolution of FeF3 alongside Li + being explored. 10,[18][19][20][21][22] Early studies on FeF3 proposed a two-step process for the reaction between Li + and FeF3 explicated by the following equations; 23,24 Fe(III)F3 + Li + + e -→ LiFe(II)F3 (4.5−2.5 V)…”

Section: Introductionmentioning

confidence: 99%

“…In this context, conversion materials that have been found to achieve high reversible capacities through multivalent redox reactions have gained massive traction as possible positive electrode replacements. , Most conversion materials are based on metal fluorides such as FeF 3 , NiF 3 , CoF 3 , MnF 3 , and TiF 3 with particular focus on iron fluorides due to the low cost of iron sources. − Extensive studies on FeF 3 have reported a high theoretical capacity of 712 mAh g –1 attained from three-electron insertion/extraction and conversion reactions with several paths for tracking the structural and chemical evolution of FeF 3 alongside Li + being explored. ,− Early studies on FeF 3 proposed a two-step process for the reaction between Li + and FeF 3 explicated by the following equations. , …”

Section: Introductionmentioning

confidence: 99%

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Phase Evolution of Trirutile Li_0.5FeF₃ for Lithium-Ion Batteries

et al. 2021

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Extensive studies on the trirutile Li0.5FeF3 phase have been commissioned in the context of Li-Fe-F system for Li-ion batteries. However, progress in electrochemical and structural studies have been greatly encumbered by the low electrochemical reactivity of this material. In order to advance this class of materials, a comprehensive study into the mechanisms of this phase is necessary. Therefore, herein, we report for the first-time overall reaction mechanisms of the ordered trirutile Li0.5FeF3 at elevated temperatures of 90 °C with the aid of a thermally stable ionic liquid electrolyte. The ordered trirutile Li0.5FeF3 is prepared by highenergy ball milling combined with heat treatment followed by electrochemical tests, X-ray diffraction, and X-ray absorption spectroscopic analyses. Our results reveal that a reversible topotactic Li + extraction/insertion from/into the trirutile structure occurs in a twophase reaction with a minor volume change (1.09 % between Li0.5FeF3 and Li0.11FeF3) in the voltage range of 3.2−4.3 V. Extension of the lower cut-off voltage to 2.5 V results in a conversion reaction to LiF and rutile FeF2 during discharging. The subsequent charge triggers the formation of the Li/Fe disordered trirutile structure at 4.3 V without showing the reconversion from LiF and rutile FeF2 to the ordered trirutile Li0.5FeF3 or FeF3.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phase Evolution of Trirutile Li_0.5FeF₃ for Lithium-Ion Batteries

et al. 2021

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“…The NC@TiO 2 /TiF 3 nanoboxes were first employed as anodes for LIBs to investigate their electrochemical performance. The cyclic voltammetry (CV) curves of NC@TiO 2 /TiF 3 exhibit a pair of redox peaks at ∼1.7 and 2.2 V (Figure A), which is attributed to the insertion and extraction reactions between Li ions and TiO 2 , respectively. , In the cathodic scans, a set of weak peaks at ∼1.1 V in the first cycle and ∼0.9 V in the successive cycles result from the conversion reaction of TiF 3 . A broad peak at ∼0.6 V corresponds to the loss of the electrolyte and the formation of the solid electrolyte interphase (SEI) layer .…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, TiF 3 with perovskite structure has large lattice spaces for the accommodation and diffusion of Li/Na ions . Very recently, Kitajou et al have reported the preparation of a uniform TiF 3 /C composite, showing elevated rate capability and good cyclability. Yu et al also confirmed an outstanding Na storage in a TiF 3 /C core-sheath nanofiber anode.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-Doped Carbon-Coated TiO₂/TiF₃ Heterostructure Nanoboxes with Enhanced Lithium and Sodium Storage Performance

Wang

et al. 2020

ACS Appl. Energy Mater.

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TiO2 is the most promising anode material for lithium-/sodium-ion batteries (LIBs/SIBs) for grid-scale energy storage. However, the use of TiO2 anodes is greatly restricted by the low theoretical capacity, inferior electrical conductivity, and slow ion diffusion. In this study, nitrogen-doped carbon-coated TiO2/TiF3 heterostructure nanoboxes with a hierarchically porous yolk–shell structure were successfully fabricated and demonstrated impressive electrochemical performance when employed as anodes for LIBs and SIBs. Specifically, this anode delivers a high lithium storage capacity of 245 mA h g–1 at 100 mA g–1 after 100 cycles and excellent rate capability up to 5000 mA g–1 with a capacity of 71 mA h g–1. In addition, it also delivers a considerable sodium storage capacity of 112 mA h g–1 at 50 mA g–1 after 100 cycles. The enhanced lithium and sodium storage performance is attributed to the TiO2/TiF3 heterostructure that improves both specific capacity and charge transfer, conductive carbon frameworks, and hierarchically porous yolk–shell structure with open diffusion channels.

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“…Wang used a scalable and low-cost strategy to prepare a CoF 2 /CNTs cathode nanocomposite, and the capacity was achieved at 550 mAh/g with excellent mechanical properties (Wang et al, 2015). Other TMFs, such as FeF 2 (Wang et al, 2011), TiF 3 (Kitajou et al, 2017;Kitajou et al, 2019), and MnF 3 (Read, 2012), have been successfully synthesized and exhibited excellent performance. The summary of the cathode type, size/thickness, phase, and performance of cathode materials in recent studies is shown in Supplementary Table S1.…”

Section: Transition Metal Fluoridesmentioning

confidence: 99%

Recent Developments of Cathode Materials for Thermal Batteries

Guo

Qian

2022

Front. Chem.

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Big progress has been made in batteries based on an intercalation mechanism in the last 20 years, but limited capacity in batteries hinders their further increase in energy density. The demand for more energy intensity makes research communities turn to conversion-type batteries. Thermal batteries are a special kind of conversion-type battery, which are thermally activated primary batteries composed mainly of cathode, anode, separator (electrolyte), and heating mass. Such kinds of battery employ an internal pyrotechnic source to make the battery stack reach its operating temperature. Thermal batteries have a long history of research and usage in military fields because of their high specific capacity, high specific energy, high thermal stability, long shelf life, and fast activation. These experiences and knowledge are of vital importance for the development of conversion-type batteries. This review provides a comprehensive account of recent studies on cathode materials. The paper covers the preparation, characterization of various cathode materials, and the performance test of thermal batteries. These advances have significant implications for the development of high-performance, low-cost, and mass production conversion-type batteries in the near future.

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Electrochemical properties of titanium fluoride with high rate capability for lithium-ion batteries

Cited by 12 publications

References 13 publications

Phase Evolution of Trirutile Li_0.5FeF₃ for Lithium-Ion Batteries

Phase Evolution of Trirutile Li_0.5FeF₃ for Lithium-Ion Batteries

Nitrogen-Doped Carbon-Coated TiO₂/TiF₃ Heterostructure Nanoboxes with Enhanced Lithium and Sodium Storage Performance

Recent Developments of Cathode Materials for Thermal Batteries

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Electrochemical properties of titanium fluoride with high rate capability for lithium-ion batteries

Cited by 12 publications

References 13 publications

Phase Evolution of Trirutile Li0.5FeF3 for Lithium-Ion Batteries

Phase Evolution of Trirutile Li0.5FeF3 for Lithium-Ion Batteries

Nitrogen-Doped Carbon-Coated TiO2/TiF3 Heterostructure Nanoboxes with Enhanced Lithium and Sodium Storage Performance

Recent Developments of Cathode Materials for Thermal Batteries

Contact Info

Product

Resources

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Phase Evolution of Trirutile Li_0.5FeF₃ for Lithium-Ion Batteries

Phase Evolution of Trirutile Li_0.5FeF₃ for Lithium-Ion Batteries

Nitrogen-Doped Carbon-Coated TiO₂/TiF₃ Heterostructure Nanoboxes with Enhanced Lithium and Sodium Storage Performance