The role of SnO2 surface coating on the electrochemical performance of LiFePO4 cathode materials

Ziółkowska, Dominika A.; Korona, K. P.; Hamankiewicz, Bartosz; Wu, She‐Huang; Chen, Mao‐Sung; Jasiński, Jacek B.; Kamińska, M.; Czerwiński, Andrzej

doi:10.1016/j.electacta.2013.06.075

Cited by 33 publications

(17 citation statements)

References 45 publications

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“…Several approaches have been explored to solve the conductivity problem. These approaches have been carried out including the reduction of particle size, [7,8] surface coatings, [9,10] or aliovalent cation doping. [11][12][13][14][15][16] The first principles' investigation revealed that LiFePO 4 is most affected by F ion doping at O site with the narrowest band gap, followed by Mn ion doping at Fe site and Na ion doping at Li site, indicating that appropriate ion doping in LiFePO 4 could improve its electronic conductivity.…”

Section: Lithium-ion Batteries Have Been Considered Asmentioning

confidence: 99%

Lithium-Ion Insertion Kinetics of Na-Doped LiFePO4 as Cathode Materials for Lithium-Ion Batteries

Zhu

Zhang

Deng

et al. 2015

Metallurgical and Materials Transactions E

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Na-doped Li 1Àx Na x FePO 4 (x = 0, 0.05, 0.1, and 0.2) materials were synthesized by a simple high-temperature solid-state method. The structure, morphology, and kinetic performances of the samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). XRD indicates that all samples are in accordance with the standard LiFePO 4 with olivine structure. SEM reveals that the particle size of all samples is about 1 to 2 lm. CV exhibits that Na doping obviously improves the reversibility and dynamic behaviors of lithium intercalation and deintercalation. EIS shows that Na doping decreases the charge transfer resistance of LiFePO 4 and improves the lithium diffusion coefficients. It can be concluded that Na doping results in lower electrode polarization and higher lithium-ion diffusion coefficient, which can effectively improve the kinetic performance of LiFePO 4 .

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Section: Lithium-ion Batteries Have Been Considered Asmentioning

confidence: 99%

Lithium-Ion Insertion Kinetics of Na-Doped LiFePO4 as Cathode Materials for Lithium-Ion Batteries

Zhu

Zhang

Deng

et al. 2015

Metallurgical and Materials Transactions E

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“…The analyzed samples were LiFePO 4 precursors synthesized by a simple, low cost sol–gel method . First, iron powder (Fe), phosphoric acid (H 3 PO 4 ), and lithium hydroxide monohydrate (LiOH·H 2 O) were dissolved in an aqueous solution of citric acid by continuous stirring.…”

Section: Methodsmentioning

confidence: 99%

“…The Raman analysis, which provided additional chemical and structural data (including chemical maps), was performed using a Renishaw in Via Raman Microscope, equipped with a Nd:YAG laser with an emission line of 532 nm. In order to avoid any possible laser-induced thermal decomposition of the samples, its power was significantly reduced for these measurements. ,, The micro-Raman point maps were based on spectra recorded in the sample areas of 900 μm 2 using the 0.5 μm step (3721 points), and the most intense peak from each of the phases observed in the spectra was mapped. The morphology of the ex situ annealed (700 °C) samples was also analyzed using scanning electron microscopy (SEM) in a FEI Nova 600 microscope.…”

Section: Methodsmentioning

confidence: 99%

In Situ XRD and TEM Studies of Sol-Gel-Based Synthesis of LiFePO₄

Ziółkowska

Jasiński

Hamankiewicz

et al. 2016

Crystal Growth & Design

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Parallel in situ TEM and XRD heating experiments of LiFePO4 precursors obtained by sol-gel method were conducted to study changes and to understand structural and morphological evolution during synthesis annealing, which is one of the most critical stages in preparing rechargeable cathodes based on these materials. Raman spectroscopy and electrochemical testing were also performed and a basic optimization of the final step of the sol-gel process was demonstrated by comparing in situ heating data with the electrochemical performance of materials annealed at different temperatures. The results obtained from these in situ measurements, at different length scales, provided a detailed picture of the structural and morphological changes and provided a better understanding of the electrochemical behavior of the final LiFePO4 material. The study showed a strong dependence between the electrochemical performance of LiFePO4 synthesized by sol-gel method and annealing temperature. The best performance was obtained with a material annealed at 800 °C.

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“…The coated materials contribute to more stable SEI film, which can slow down the decomposition of electrolyte and protect bulk materials from corrosion during charging and discharging. For instance, SnO 2 was adopted to improve the electrochemical properties in many cathode materials with better results such as LiCoO 2 (Hudaya et al, 2014), LiFePO 4 (Ziolkowska et al, 2013), and LiMn 2 O 4 (Ma et al, 2017), LiNi 1/3 Co 1/3 Mn 1/3 O 2 (Luo et al, 2015) (He et al, 2017;Xie et al, 2019). However, the influence of SnO 2 modification on electrochemical properties of LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode materials has rarely been researched.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Nano SnO2 Modification on LiNi0.8Mn0.1Ni0.1O2 Cathode Materials for Lithium Ion Batteries

Wang

Peng

et al. 2019

Front. Energy Res.

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The precursor material of Ni 0. 8Co 0.1 Mn 0.1 (OH) 2 was prepared by a co-precipitation method to obtain the layered cathode materials LiNi 0.8 Co 0.1 Mn 0.1 O 2 (811) through roasting with LiOH•H 2 O. Then the SnO 2-modified samples were obtained by adding tin oxide into the ball mill. It was found by XRD characterization of the original and modified samples, that the addition of SnO 2 did not change the layered structure of the raw materials. Microstructure and distribution of the SnO 2 were analyzed with SEM and EDS. Charge/discharge tests indicated that the SnO 2-modified phases improved the cycling stability and rate capability. The results of CV test showed that the polarization of SnO 2 modified electrode was smaller. AC impedance showed that SnO 2 /LiNi 0.8 Co 0.1 Mn 0.1 O 2 electrode had smaller R ct and R f value. The above test results indicate that the modification of SnO 2 improves the electrochemical performance of cathode material LiNi 0.8 Co 0.1 Mn 0.1 O 2 .

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The role of SnO2 surface coating on the electrochemical performance of LiFePO4 cathode materials

Cited by 33 publications

References 45 publications

Lithium-Ion Insertion Kinetics of Na-Doped LiFePO4 as Cathode Materials for Lithium-Ion Batteries

Lithium-Ion Insertion Kinetics of Na-Doped LiFePO4 as Cathode Materials for Lithium-Ion Batteries

In Situ XRD and TEM Studies of Sol-Gel-Based Synthesis of LiFePO₄

Synthesis and Characterization of Nano SnO2 Modification on LiNi0.8Mn0.1Ni0.1O2 Cathode Materials for Lithium Ion Batteries

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The role of SnO2 surface coating on the electrochemical performance of LiFePO4 cathode materials

Cited by 33 publications

References 45 publications

Lithium-Ion Insertion Kinetics of Na-Doped LiFePO4 as Cathode Materials for Lithium-Ion Batteries

Lithium-Ion Insertion Kinetics of Na-Doped LiFePO4 as Cathode Materials for Lithium-Ion Batteries

In Situ XRD and TEM Studies of Sol-Gel-Based Synthesis of LiFePO4

Synthesis and Characterization of Nano SnO2 Modification on LiNi0.8Mn0.1Ni0.1O2 Cathode Materials for Lithium Ion Batteries

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In Situ XRD and TEM Studies of Sol-Gel-Based Synthesis of LiFePO₄