Study on the influences of calcination temperature on structure and its electrochemical performance of Li2FeSiO4/C nano cathode for Lithium Ion Batteries

Sivaraj, P.; Nalini, B.; Abhilash, K.P.; Lakshmi, D.; Selvin, P. Christopher; Balraju, P.

doi:10.1016/j.jallcom.2018.01.051

Cited by 27 publications

(17 citation statements)

References 27 publications

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“…The XRD pattern of bare and cations (Ag 1+ , Zn 2+ , Cr 3+ , and Ti 4+ )‐doped LFSO/C nano cathode is shown in Figure A. The XRD peaks of bare LFSO/C can be assigned to an orthorhombic structure ( a = 6.27Å, b = 5.33Å, and c = 4.96 Å, α = γ = β = 90°) with the Pmn 2 1 space group which are consistent with the previous reports . It is noticed that the LFSO/C does not exhibit any kind of impurities such as Fe 3 O 4 , Fe 2 O 3, and LiSiO 3 , which indicates the formation of a pure phase.…”

Section: Resultssupporting

confidence: 87%

“…an orthorhombic structure (a = 6.27Å, b = 5.33Å, and c = 4.96 Å, α = γ = β = 90°) with the Pmn2 1 space group which are consistent with the previous reports. 15,16 It is noticed that the LFSO/C does not exhibit any kind of impurities such as Fe 3 O 4 , Fe 2 O 3, and LiSiO 3 , which indicates the formation of a pure phase. The Li 2 Fe 0.9 Ag 0.1 SiO 4 /C cathode material possesses the same orthorhombic structure with the Pmn2 1 space group.…”

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: Resultssupporting

confidence: 87%

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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“…The SiO 4 tetrahedrons are not directly connected instead of sharing one point (O 2 − ) with the adjacent MO 4 tetrahedron to form a layer that could infinitely extend over two degrees of the space for providing channels for the intercalation/de-intercalation of Li + ( Fig. 2 (f [52] . Followed by that, the exploration of the mechanism of exact transition between cationic and anionic redox activities in this cathode material demonstrated that this material potentially has a remarkable high energy density [53] .…”

Section: Silicate LI 2 Msiomentioning

confidence: 99%

Recent progress of surface coating on cathode materials for high-performance lithium-ion batteries

Guan

Zhou

et al. 2020

Journal of Energy Chemistry

313

142

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“…The carbon‐coated Li 2 FeSiO 4 nanoparticles (40–80 nm) were prepared via hydrothermal assisted sol‐gel method [59] delivered a specific discharge capacity of 160, 91 and 78 mAh g −1 at C/16, 5 C and 10 C rates. The impact of the calcination temperature on the structural and electrochemical stability of the Li 2 FeSiO 4 /C nano‐cathode was investigated by optimising the calcination temperature (400–1000 °C) using the sol‐gel process [60] . The investigation found that the sample calcined at 700 °C and 850 °C exhibited the orthorhombic (Pmn2 1 ) and monoclinic (P2 1 /n) structures (Figure 3(ii))).…”

Section: Silicates: An Alternative Viable Cathode?mentioning

confidence: 99%

A Critical Review on Electrochemical Properties and Significance of Orthosilicate‐Based Cathode Materials for Rechargeable Li/Na/Mg Batteries and Hybrid Supercapacitors

2021

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The polyanion orthosilicates such as Li2XSiO4 (X=Fe, Mn, Co, Ni), Na2XSiO4 (X=Fe, Mn, Co, Ni) and MgXSiO4 (X=Fe, Mn, Co, Ni) have been considered as viable cathode materials for the Li/Na/Mg batteries and hybrid supercapacitors. Significant capacity fading, structural instability, and low conductivity are the major impediments in silicate‐based cathode materials, which limit their practical applicability and industrial implementation. Identifying the source of capacity fading in these compounds upon cycling would offer better insight which merely reporting in previous efforts. The primary aim of this systematic review is to provide a clear insight on structure, morphology, electrical and electrochemical advances, and major impediments in the Li2XSiO4, Na2XSiO4 and MgXSiO4 type electrode materials. This study also compared the electrochemical results of various orthosilicate materials and discussed the mechanism of structural fracture during cycling. Among the numerous silicates, Li2FeSiO4 and Li2MnSiO4 are considered as promising cathode materials for advanced LIBs. This review also offers future opportunities and possible solutions to the structural and electrochemical inhibitions in Li2XSiO4, Na2XSiO4 and MgXSiO4 based‐electrodes for the development of rechargeable Li/Na/Mg batteries and hybrid supercapacitors.

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Study on the influences of calcination temperature on structure and its electrochemical performance of Li2FeSiO4/C nano cathode for Lithium Ion Batteries

Cited by 27 publications

References 27 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

Recent progress of surface coating on cathode materials for high-performance lithium-ion batteries

A Critical Review on Electrochemical Properties and Significance of Orthosilicate‐Based Cathode Materials for Rechargeable Li/Na/Mg Batteries and Hybrid Supercapacitors

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Study on the influences of calcination temperature on structure and its electrochemical performance of Li2FeSiO4/C nano cathode for Lithium Ion Batteries

Cited by 27 publications

References 27 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

Recent progress of surface coating on cathode materials for high-performance lithium-ion batteries

A Critical Review on Electrochemical Properties and Significance of Orthosilicate‐Based Cathode Materials for Rechargeable Li/Na/Mg Batteries and Hybrid Supercapacitors

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Product

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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