Orthorhombic Lithium Titanium Phosphate as an Anode Material for Li-ion Rechargeable Battery

Kee, Yongho; Dimov, Nikolay; Minami, Keita; Okada, Shigeto

doi:10.1016/j.electacta.2015.06.032

Cited by 14 publications

(7 citation statements)

References 17 publications

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“…Polyanionic host materials such as LiMPO 4 , Li x M 2 (PO 4 ) 3 , Li x -MSiO 4 , and Li 2 MP 2 O 7 have been widely explored and implemented as promising Li-ion battery electrode materials due to their high thermal stability and the inductive effect of the hetero atoms in the polyanion group, which effectively increases the operating voltage of transition metal redox couples. [1][2][3][4][5][6][7][8][9] However, limited availability of Li-containing minerals considerably restricts the adoption of lithium-ion batteries in largescale energy storage systems. One of the promising alternatives to current Li-ion secondary batteries is Na-ion batteries, which have potential price competitiveness due to the abundance of Na in the nature.…”

Section: Introductionmentioning

confidence: 99%

Insight into the limited electrochemical activity of NaVP₂O₇

et al. 2015

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Recently, LiVP 2 O 7 has been investigated as a possible high-voltage substitute for Li 2 FeP 2 O 7 . However, its Na-equivalent, NaVP 2 O 7 , as an economic replacement for Li 2 FeP 2 O 7 has not yet been well understood.Here, for the first time, we report the feasibility of NaVP 2 O 7 as a 3.4 V cathode material for Na-ion batteries. Having a theoretical capacity of 108 mA h g À1 , it shows an initial discharge capacity of 38.4 mA h g À1 at 1/20C (1C ¼ 108 mA g À1 ) in the voltage range of 2.5-4.0 V. Our study suggests that part of the sodium ions in the lattice structure exist as structural stabilizers and bring lattice distortion upon desodiation. This study also shows that the title compound, NaVP 2 O 7 , suffers from high intrinsic internal resistance, which limits the phase transition kinetics between pristine NaVP 2 O 7 and desodiated Na 1Àx VP 2 O 7 .

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Section: Introductionmentioning

confidence: 99%

Insight into the limited electrochemical activity of NaVP₂O₇

et al. 2015

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“…[2][3][4][5][6][7][8][9] Y. Kee and coworkers reported the synthesis of rhombohedral LiTi 2 (PO 4 ) 3 and orthorhombic Li 1.5 Ti 2 (PO 4 ) 3 via the sol-gel method and the investigation of their use as anode materials for rechargeable Liion batteries. 10 S. Patoux and C. Masquelir reported that LiTiPO 5 / Super P carbon (SP carbon; MMM Carbon, Belgium) electrodes worked as active materials using cyclic voltammetry (CV) measurements and galvanostatic intermittent titration techniques (GITT).…”

Section: Introductionmentioning

confidence: 99%

Charge/discharge Behavior of Triclinic LiTiOPO<sub>4</sub> Anode Materials for Lithium Secondary Batteries

Morimoto

Ito²,

Ogata³

et al. 2016

Electrochemistry

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Triclinic LiTiOPO 4 fine powders were synthesized via low-temperature thermal treatment. First, amorphous fine powders were prepared by mechanical milling (MM) treatment of a mixture of the starting materials (Li 2 CO 3 , TiO 2 , and P 2 O 5 ) at room temperature. The mechanically milled amorphous powder formed a triclinic LiTiOPO 4 crystal below 700°C in air. The mechanically milled powders before heat treatment barely worked as an active material at ca. 0.1 C rate in the potential range of 1.0 to 3.0 V versus Li/Li + in lithium cells. On the other hand, the triclinic LiTiOPO 4 compounds obtained by the crystallization of the mechanically milled amorphous powders at 700°C in air worked as anode materials in lithium cells. The triclinic LiTiOPO 4 electrode materials exhibited capacities of around 100 mAh g −1. The average operation potential was around 1.7 V (vs. Li/Li + ). The triclinic LiTiOPO 4 pristine compound when used as an anode caused a phase transition into an orthorhombic compound during lithium insertion (charge process). The orthorhombic compound changed into a triclinic phase during lithium extraction (discharge process). The triclinic LiTiOPO 4 electrodes exhibited a good cycle performance in the potential range of 1.0 to 3.0 V versus Li/Li + . It is suggested that the crystalline phase changes reversibly during charge/discharge.

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“…With the increase of cycle number, the oxidation and reduction peak area are symmetrical, and the Δ E becomes small, which indicates that the composites would have better electrochemical performance initially without activation . The most obvious redox peaks located at 2.41/2.54 V are attributed to the redox reaction of the Ti 4+ /Ti 3+ redox couple in LNC@M, corresponding to the Li + embedding/de-embedding process during the transformation of the LiTi 2 (PO 4 ) 3 phase and Li 3 Ti 2 (PO 4 ) 3 phase . The tangential method was used to find the corresponding detailed redox peak current and Δ E values in Table S1.…”

Section: Resultsmentioning

confidence: 99%

“…46 The most obvious redox peaks located at 2.41/2.54 V are attributed to the redox reaction of the Ti 4+ /Ti 3+ redox couple in LNC@M, corresponding to the Li + embedding/de-embedding process during the transformation of the LiTi 2 (PO 4 ) 3 phase and Li 3 Ti 2 (PO 4 ) 3 phase. 47 The tangential method was used to find the corresponding detailed redox peak current and ΔE values in Table S1. In addition, three groups of redox peaks located at 1.69/1.94, 2.17/2.21, and 2.55/2.60 V can also be found, which are the reactions of TiO 2 , titanium phosphate, and TiP 2 O 7 .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Decorating Lithium Titanium-Phosphate Carbon Layers with Mo₂C as Efficient Li-Ion Storage Electrode

Guo

Zhang

Liu

et al. 2023

ACS Appl. Energy Mater.

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Rapid charging technology is increasingly needed, especially in the case of continuous energy consumption. Na superionic conductor (NASICON)type materials are considered one of the most attractive candidates for lithium-ion batteries (LIBs) due to their multiple ionic channels and efficient kinetics. LiTi 2 (PO 4 ) 3 as a representative of the NASICON-type has been widely studied because of its own advantages. LiTi 2 (PO 4 ) 3 's own poor electronic conductivity restricts its further development. Herein, Mo 2 C was used to decorate the external carbon layer of the LiTi 2 (PO 4 ) 3 to alleviate this problem. The excellent conductivity of Mo 2 C can enhance the concentration of electrons in the carbon layer and improve the Li + /e − conversion efficiency of electrodes. Therefore, the LiTi 2 (PO 4 ) 3 /C@Mo 2 C composites displayed outstanding capacity retention of 86.8% after 4000 cycles under a high current density of 10 C, showing excellent and stable electrochemical performance. This work provides a fungible and convenient route for the hybrid of NASICON-type and carbon-layer materials as high-performance electrodes for Li-ion batteries. KEYWORDS: NASICON-type, LiTi 2 (PO 4 ) 3 , Mo 2 C nanoparticle, carbon layer, lithium-ion batteries

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Orthorhombic Lithium Titanium Phosphate as an Anode Material for Li-ion Rechargeable Battery

Cited by 14 publications

References 17 publications

Insight into the limited electrochemical activity of NaVP₂O₇

Insight into the limited electrochemical activity of NaVP₂O₇

Charge/discharge Behavior of Triclinic LiTiOPO<sub>4</sub> Anode Materials for Lithium Secondary Batteries

Decorating Lithium Titanium-Phosphate Carbon Layers with Mo₂C as Efficient Li-Ion Storage Electrode

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Orthorhombic Lithium Titanium Phosphate as an Anode Material for Li-ion Rechargeable Battery

Cited by 14 publications

References 17 publications

Insight into the limited electrochemical activity of NaVP2O7

Insight into the limited electrochemical activity of NaVP2O7

Charge/discharge Behavior of Triclinic LiTiOPO<sub>4</sub> Anode Materials for Lithium Secondary Batteries

Decorating Lithium Titanium-Phosphate Carbon Layers with Mo2C as Efficient Li-Ion Storage Electrode

Contact Info

Product

Resources

About

Insight into the limited electrochemical activity of NaVP₂O₇

Insight into the limited electrochemical activity of NaVP₂O₇

Decorating Lithium Titanium-Phosphate Carbon Layers with Mo₂C as Efficient Li-Ion Storage Electrode