Fabrication and characterization of carbon-coated Li2FeSiO4 nanoparticles reinforced by carbon nanotubes as high performance cathode materials for lithium-ion batteries

Zhang, Zheng; Liu, Xingquan; Wang, Liping; Wu, Yue; Zhao, Hongyuan; Chen, Bing; Xiong, Weiqiang

doi:10.1016/j.electacta.2015.04.002

Cited by 44 publications

(11 citation statements)

References 35 publications

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“…In addition, the binding energies of the Fe2 p , Li1s, O1 s , Si2 p for Ag 1+ , Zn 2+ , Cr 3+ , and Ti 4+ ‐doped samples (Figure B‐F) are very close to that of LFSO/C, which demonstrates that the metal ions doping does not change the oxidation state of Fe 2+ , Li 1+ , Si 4+ , and O 2− . Moreover the C 1 s XPS spectra originated a peak at 290 eV attributed to CO 3 2− which is evidence of the presence of Li 2 CO 3 , however, its intensity was found to be very small which indicated that the presence is only in trace amount . The atomic % of the dopant elements (Ag 1+ , Zn 2+ , Cr 3+ , and Ti 4+ ), that is present in the LFSO/C has been estimated by the XPS peak area calculation using the CASA XPS Software and tabulated in Table .…”

Section: Resultsmentioning

confidence: 99%

“…Moreover the C 1s XPS spectra originated a peak at 290 eV attributed to CO 3 2− which is evidence of the presence of Li 2 CO 3 , however, its intensity was found to be very small which indicated that the presence is only in trace amount. 23,24 The atomic % of the dopant elements (Ag 1+ , Zn 2+ , Cr 3+ , and Ti 4+ ), that is present in the LFSO/C has been estimated by the XPS peak area calculation using the CASA XPS Software and tabulated in Table 1. From Table 1, the estimated content of dopant elements Ag, Zn, Cr, and Ti at Fe site in the LFSO/C sample is 0.671, 1.170, 1.172, and 1.169 (at.%), respectively.…”

Section: Structural and Morphological Characterizationsmentioning

confidence: 99%

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Insight into cations substitution on structural and electrochemical properties of nanostructured Li₂FeSiO₄/C cathodes

et al. 2019

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Structural instability is the major obstacle in the Li2FeSiO4/C cathode during charge and discharge process, which can be improved by the substitution of cations in the host cage. In this study, the transition metal ions with different valence (Ag1+, Zn2+, Cr3+, and Ti4+) have been substituted in Li2FeSiO4/C via modified sol‐gel method and the impact on the structural, electrical, and electrochemical performances has been systematically explored. The Rietveld‐refined XRD pattern and HR‐TEM (SAED) result reveal that all the prepared samples maintain orthorhombic structure (S.G‐ Pmn21). The FE‐SEM and TEM micrographs of bare and doped Li2FeSiO4/C display nanoparticle formation with 20‐40 nm size. Among different cation‐substituted silicates, Li2Fe0.9Ti0.1SiO4/C sample exhibits an excellent total conductivity of 1.20 × 10−4 S cm−1 which is one order of magnitude higher than the bare Li2FeSiO4/C sample. The galvanostatic charge‐discharge curves and cyclic voltammetric analysis reveal that the Li2Fe0.9Ti0.1SiO4/C material provides an excellent initial specific capacity of 242 mAh g−1 and maintains a capacity of 226 mAh g−1 after 50 cycles with capacity retention of 93.38%. The Ti doping is a promising strategy to overcome the capacity fading issues, by preventing the structural collapse during Li‐ion intercalation/de‐intercalation processes in the Li2FeSiO4/C electrode through the strong hybridization between the 3d and 4s orbitals in titanium and 2p orbital in oxygen.

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Section: Resultsmentioning

confidence: 99%

Section: Structural and Morphological Characterizationsmentioning

confidence: 99%

Insight into cations substitution on structural and electrochemical properties of nanostructured Li₂FeSiO₄/C cathodes

et al. 2019

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“…This particle size is improved size as compared with Li2FeSiO4 and Li2MnSiO4. It is reported in literature that material with lesser particle size reveals better electrochemical properties due to reduction path length of Li + ions [4]. Further particle size also decreases on addition of MWCNT.…”

Section: Fig1 Fesem Analysis Of Li2mnfesio4 (Lmfs)mentioning

confidence: 90%

Development of Novel Cathode Materials Based on MWCNT for Energy Storage/Conversion Devices

Agnihotri¹,

Rattan²,

Sharma³

2016

Springer Proceedings in Physics

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Novel compound comprising of Li2FexMn(1-x)SiO4/MWCNT were prepared by using Sol-Gel technique. In this study, improved electrochemical properties are observed by substituting Fe to replace Mn. and further multiwalled carbon nano tubes are used to prepare composite with prepared cathode material in Lithium ion battery and electrode materials in super capacitors. Various characterization techniques like: FESEM, EDX confirms the structure, morphology and texture of the material. Average particle size is found to be of order of 20-30 nm. As particles with smaller size reveal better electrical conductivity/electrochemical properties, which are confirmed by A.C Impedence spectroscopy and cyclic voltammetery results.Index Terms Cathode material, Multi walled carbon nano tubes,Li ion battery, supercapacitors , electrical conductivity, Cyclic Voltametry.

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“…In the case of titanate or silicate electrode materials, the preparation of solutions is more difficult because few precursors are soluble in aqueous solutions of less-than-extreme pH. Chloride and/or alkoxide precursors (such as TEOS Si(OC 2 H 5 ) 4 [350,352], titanium isopropoxide Ti(OC 3 H 7 ) 4 [128,132,212,227,235,243,248,251] or tert-butoxide Ti(OC 4 H 9 ) 4 [211,222,229,238,239,240,241,249,250,265], …) can be solubilized in alcohol but hydrolysis takes place when mixing with water, leading to the precipitation of SiO 2 or TiO 2 unless special care is taken as in the strategies summarized in Figure 4.…”

Section: Formulation Of Solutions/suspensions: Inorganic Componentsmentioning

confidence: 99%

Spray-Drying of Electrode Materials for Lithium- and Sodium-Ion Batteries

et al. 2018

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The performance of electrode materials in lithium-ion (Li-ion), sodium-ion (Na-ion) and related batteries depends not only on their chemical composition but also on their microstructure. The choice of a synthesis method is therefore of paramount importance. Amongst the wide variety of synthesis or shaping routes reported for an ever-increasing panel of compositions, spray-drying stands out as a versatile tool offering demonstrated potential for up-scaling to industrial quantities. In this review, we provide an overview of the rapidly increasing literature including both spray-drying of solutions and spray-drying of suspensions. We focus, in particular, on the chemical aspects of the formulation of the solution/suspension to be spray-dried. We also consider the post-processing of the spray-dried precursors and the resulting morphologies of granules. The review references more than 300 publications in tables where entries are listed based on final compound composition, starting materials, sources of carbon etc.

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Fabrication and characterization of carbon-coated Li2FeSiO4 nanoparticles reinforced by carbon nanotubes as high performance cathode materials for lithium-ion batteries

Cited by 44 publications

References 35 publications

Insight into cations substitution on structural and electrochemical properties of nanostructured Li₂FeSiO₄/C cathodes

Insight into cations substitution on structural and electrochemical properties of nanostructured Li₂FeSiO₄/C cathodes

Development of Novel Cathode Materials Based on MWCNT for Energy Storage/Conversion Devices

Spray-Drying of Electrode Materials for Lithium- and Sodium-Ion Batteries

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Fabrication and characterization of carbon-coated Li2FeSiO4 nanoparticles reinforced by carbon nanotubes as high performance cathode materials for lithium-ion batteries

Cited by 44 publications

References 35 publications

Insight into cations substitution on structural and electrochemical properties of nanostructured Li2FeSiO4/C cathodes

Insight into cations substitution on structural and electrochemical properties of nanostructured Li2FeSiO4/C cathodes

Development of Novel Cathode Materials Based on MWCNT for Energy Storage/Conversion Devices

Spray-Drying of Electrode Materials for Lithium- and Sodium-Ion Batteries

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Insight into cations substitution on structural and electrochemical properties of nanostructured Li₂FeSiO₄/C cathodes

Insight into cations substitution on structural and electrochemical properties of nanostructured Li₂FeSiO₄/C cathodes