LiFePO4 doped with magnesium prepared by hydrothermal reaction in glucose solution

Ou, Xiu Qin; Liang, Guang Chuan; Liang, Jin; Xu, Sheng Zhao; Zhao, Xing

doi:10.1016/j.cclet.2007.10.052

Cited by 21 publications

(7 citation statements)

References 21 publications

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“…diffuse through the LiFePO 4 structure difficultly, which is compatible with Jiang's result [36]. Also, annealing the samples completes the carbonization of citric acid as well as increases the crystallinity of LiFePO 4 powders for better ion diffusion [15]. It is pointed out that excellent electrochemical performance can be achieved by optimizing other factors during synthesis, including particle size, morphology, homogeneity, crystallinity, and purity of the material.…”

Section: Resultsmentioning

confidence: 89%

“…The disadvantage of pristine LiFePO 4 is low electrical conductivity (1 9 10 -9 SÁcm -1 ) and poor ability to diffuse ions (1 9 10 -14 cm 2 Ás -1 ), which limit its practical use in large applications [11]. To solve these problems, various strategies, including particle size reduction, carbon coating and metal doping, were proposed [12][13][14][15]. However, experimental results show that carbon coating has a more significant effect on performance than doping and particle size reduction, so most researchers in this field are of the opinion that carbon coating is worth further study [16,17].…”

Section: Introductionmentioning

confidence: 99%

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Improvement of electrochemical and electrical properties of LiFePO4 coated with citric acid

Talebi‐Esfandarani

Savadogo

2015

Rare Met.

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LiFePO 4 was synthesized using hydrothermal method and coated with different amounts of citric acid as carbon source. The samples were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), surface area measurement-Brunauer-Emmett-Teller (BET), discharge capability, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The results show that the quality and thickness of the carbon coating on the surface of LiFePO 4 particles are very important. The optimum carbon content (about 30 wt%) can lead to a more uniform carbon distribution. Electrochemical results show that the samples containing 20 wt%, 30 wt%, 40 wt%, and 50 wt% carbon deliver a discharge capacity of 105, 167, 151, and 112 mAhÁg -1 , respectively, at the rate of 0.1C. The increase of carbon content leads to the decrease of discharge capacity of LiFePO 4 /C, owing to the fact that excess carbon delays the diffusion of Li ? through the carbon layers during charge/discharge procedure. The LiFePO 4 /C with low carbon content exhibits poor electrochemical performance because of its low electrical conductivity. Therefore, the amount of carbon must be optimized in order to achieve excellent electrochemical performance of LiFePO 4 /C for its application in a lithium ion battery.

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Section: Resultsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Improvement of electrochemical and electrical properties of LiFePO4 coated with citric acid

Talebi‐Esfandarani

Savadogo

2015

Rare Met.

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“…Finally, carbon microspheres with hydrophilic shells (hydroxyl, carbonyl, carboxyl, ester) were formed, which can attract ions in solution, such as metal ions. The diameter of these spheres can be regulated by adjusting the hydrothermal time and the concentration of the glucose solution, and the whole process is green and chemical-free [19]. The nanostructured hollow MgO microspheres were prepared by the template method.…”

Section: Methodsmentioning

confidence: 99%

Preparation and Characterization of Nanostructured Hollow MgO Spheres

Han

Yuan

2019

Materials

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Nanostructured hollow MgO microspheres were prepared by the template method. First, D-Anhydrous glucose was polymerized by the hydrothermal method to form a template. Second, a colorless solution was obtained by mixing magnesite with hydrochloric acid in a 1:2 proportion and heating in an 80 °C water bath for 2 h. Finally, the template from the first step was placed in the colorless solution, and the resulting precipitate was calcined at 550 °C for 2 h. The phase composition and microstructure of the calcined samples were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The XRD results indicated that the main crystal is periclase. The SEM results indicates that the template carbon microsphere surface is smooth, and the its size is uniform and concentrated in the range of 100–200 nm. The diameters of the samples range from 60 to 90 nm, which is smaller than the size of the carbon microsphere. The TEM results indicates that the sample is hollow with a shell thickness of about 6–10 nm. The specific surface area of the calcined hollow sphere is 59.5 m²·g−1.

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“…It is a usual method to deal with hydrothermally synthesized LiFePO 4 by post annealing treatment [32]. After annealing, its crys- tallization as well as electrochemical properties can be improved.…”

Section: Electrochemical Characteristicsmentioning

confidence: 99%

Electrochemical performances of Co-doped LiFePO4/C obtained by hydrothermal method

Yang

Bai

Qing

et al. 2011

Journal of Alloys and Compounds

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LiFePO4 doped with magnesium prepared by hydrothermal reaction in glucose solution

Cited by 21 publications

References 21 publications

Improvement of electrochemical and electrical properties of LiFePO4 coated with citric acid

Improvement of electrochemical and electrical properties of LiFePO4 coated with citric acid

Preparation and Characterization of Nanostructured Hollow MgO Spheres

Electrochemical performances of Co-doped LiFePO4/C obtained by hydrothermal method

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