One-pot synthesis of Li2FePO4F nanoparticles via a supercritical fluid process and characterization for application in lithium-ion batteries

Devaraju, Murukanahally Kempaiah; Honma, Itaru

doi:10.1039/c3ra42686f

Cited by 15 publications

(4 citation statements)

References 27 publications

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“…The observed diffraction peaks of both LiCoPO 4 particles are well matched with JCPDS file (# 00-085-0002), and belongs to orthorhombic crystal system with Pnma space group. The XRD patterns are in agreement with the reported pattern [23,31,[46][47][48][49]. The calculated cell parameters and the Rietveld reliability factors for LiCoPO 4 [50][51][52].…”

Section: X-ray Powder Diffraction Analysissupporting

confidence: 88%

“…The peak below 0.3 eV is corresponds to the carbon peak, the intensity of C peak is higher for the LiCoPO 4 nanoparticles synthesized using C 4 H 6 CoO 4 4H 2 O as starting material due to the formation of carbon after dissociation reaction of C 4 H 6 CoO 4 4H 2 O at supercritical fluid conditions. However, presence of carbon in these cathode materials is beneficial in order improve the conductivity of the LiCoPO 4 nanoparticles during electrochemical reactions [46,47].…”

Section: Elemental Mappingmentioning

confidence: 99%

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Supercritical Fluid Synthesis of LiCoPO4 Nanoparticles and Their Application to Lithium Ion Battery

et al. 2014

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In this work, LiCoPO 4 nanoparticles were synthesized by supercritical fluid method using cobalt nitrate hexahydrate (Co(NO 3) 2 6H 2 O) and cobalt acetate tetrahydrate (C 4 H 6 CoO 4 4H 2 O) as starting materials. The effect of starting materials on particle morphology, size, and the crystalline phase were investigated. The as-synthesized samples were systematically characterized by XRD, TEM, STEM, EDS, BET, and TG and charge-discharge measurements. In addition, Rietveld refinement analysis was performed. The electrochemical measurements of LiCoPO 4 nanoparticles have shown differences in capacities depending on the starting materials used in the synthesis and the results have been discussed in this paper.

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Section: X-ray Powder Diffraction Analysissupporting

confidence: 88%

Section: Elemental Mappingmentioning

confidence: 99%

Supercritical Fluid Synthesis of LiCoPO4 Nanoparticles and Their Application to Lithium Ion Battery

et al. 2014

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“…Using supercritical fluid process we achieved direct synthesis of phase pure LiNiPO 4 due to the overwhelming advantages of this process as we reported in many of our previously published papers151617181920. The synthesis procedure for LiNiPO 4 cathode materials is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…To control the shape and morphology of cathode materials solution based synthesis is more suitable1. Recently, we have reported size and morphology controlled synthesis of variety of cathode materials such as phosphate, silicates and flurophosphates via a supercritical fluid process151617181920212223 and observe the improvement of electrochemical performances with related to size and shape.…”

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confidence: 99%

Synthesis, characterization and observation of antisite defects in LiNiPO4 nanomaterials

Devaraju

Truong

Hyodo

et al. 2015

Sci Rep

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Structural studies of high voltage cathode materials are necessary to understand their chemistry to improve the electrochemical performance for applications in lithium ion batteries. LiNiPO4 nanorods and nanoplates are synthesized via a one pot synthesis using supercritical fluid process at 450 oC for 10 min. The X-ray diffraction (XRD) analysis confirmed that LiNiPO4 phase is well crystallized, phase purity supported by energy dispersive spectroscopy (EDS) and elemental mapping by scanning electron transmission electron microscopy (STEM). For the first time, we have carried out direct visualization of atom-by-atom structural observation of LiNiPO4 nanomaterials using high-angle annular dark-field (HAADF) and annular bright-field (ABF) scanning transmission electron microscopy (STEM) analysis. The Rietveld refinement analysis was performed to find out the percentage of antisite defects presents in LiNiPO4 nanoplates and about 11% of antisite defects were found. Here, we provide the direct evidence for the presence of Ni atoms in Li sites and Li in Ni sites as an antisite defects are provided for understanding of electrochemical behavior of high voltage Li ion battery cathode materials.

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Review on Synthesis, Characterization, and Electrochemical Properties of Fluorinated Nickel‐Cobalt‐Manganese Cathode Active Materials for Lithium‐Ion Batteries

Breddemann

Krossing

2020

ChemElectroChem

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In this Review, we report and compare non‐fluorinated with fluorinated cathode active materials (CAMs) based on a nickel‐cobalt‐manganese (NCM) composition such as HE‐NCM, NCM, Ni‐rich, Co‐rich, and Mn‐rich CAMs. We evaluate the CAMs according to their fluoride concentration, the F sources used in the synthesis method, characterization techniques, and battery performance [(initial) capacity or coulombic efficiency at C‐rate before/after cycles and the temperature]. In detail, we address 33 publications with “single” fluorinated NCM CAMs, including F sources such as LiF, [NH4]F, [NH4]FHF, NaF, NiF2, and F2. Furthermore, we give a short overview of 52 articles for “multiple” (anion and cation) treated NCM CAMs. For all reported articles (single and multiple treated NCM CAMs), we give the CAMs, conductive additives, and binder materials, as well their electrolyte compositions.

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One-pot synthesis of Li2FePO4F nanoparticles via a supercritical fluid process and characterization for application in lithium-ion batteries

Cited by 15 publications

References 27 publications

Supercritical Fluid Synthesis of LiCoPO4 Nanoparticles and Their Application to Lithium Ion Battery

Supercritical Fluid Synthesis of LiCoPO4 Nanoparticles and Their Application to Lithium Ion Battery

Synthesis, characterization and observation of antisite defects in LiNiPO4 nanomaterials

Review on Synthesis, Characterization, and Electrochemical Properties of Fluorinated Nickel‐Cobalt‐Manganese Cathode Active Materials for Lithium‐Ion Batteries

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