A simple, cheap soft synthesis routine for LiFePO4 using iron(III) raw material

Wang, L.N.; Zhang, Z.G.; Zhang, K.L.

doi:10.1016/j.jpowsour.2007.02.002

Cited by 68 publications

(43 citation statements)

References 27 publications

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“…[10][11][12] Past efforts have used various carbon sources to coat LiFePO 4 particles. These sources include sucrose, [13][14][15][16][17] poly(ethylene glycol), [17][18][19] citric acid, 20 and poly(vinyl alcohol). 7,21,22 Graphene, as a twodimensional macromolecular sheet of carbon atoms with a honeycomb structure, has excellent electronic conductivity and mechanical properties, and may be the ideal conductive additive for hybrid nanostructured electrodes.…”

Section: -4mentioning

confidence: 99%

Graphene wrapped LiFePO4/C composites as cathode materials for Li-ion batteries with enhanced rate capability

et al. 2012

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To reduce the reaction time, electrical energy consumption, and cost, LiFePO 4 /C/graphene has been synthesized by a rapid, one-pot, microwave-assisted hydrothermal method within 15 min at a temperature of 200 C, followed by sintering at 600 C for 2 h under a H 2 /Ar (5 : 95, v/v) atmosphere.The microstructure and morphology of the LiFePO 4 /C/graphene products were characterized by means of X-ray diffraction, Raman spectroscopy, field emission scanning electron microscopy, and transmission electron microscopy. The carbon coated LiFePO 4 /C nanoparticles, around 200 nm in size, are thoroughly wrapped by crumpled micrometer-size graphene sheets. In this kind of structure, the bridging graphene nanosheets can form an effective conducting network and provide interconnected open pores that favor electrolyte absorption and reduce the diffusion path of the lithium ions. The cyclic voltammograms, charge/discharge profiles, and AC impedance measurements indicated that the kinetics of the LiFePO 4 /C/graphene was better than that of LiFePO 4 /C. The LiFePO 4 /C/graphene composite exhibited a discharge capacity of 165 mA h g À1 at 0.1 C and 88 mA h g À1 at 10 C, respectively.Therefore, the LiFePO 4 /C/graphene composite is a promising candidate for the development of highperformance, cost-effective lithium batteries for the hybrid vehicle and electric vehicle markets.

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Section: -4mentioning

confidence: 99%

Graphene wrapped LiFePO4/C composites as cathode materials for Li-ion batteries with enhanced rate capability

et al. 2012

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“…Olivine phase LiFePO 4 , with a theoretical capacity of 170 mA h g -1 and a flat voltage plateau at 3.4 V (vs. Li + /Li), has been considered as a promising electrode material for these rechargeable lithium-ion batteries [5][6][7][8] . Although LiFePO 4 possesses many advantages, it has suffered from poor electronic conductivity and Li-ion diffusion coefficient.…”

Section: Introductionmentioning

confidence: 99%

Effect of reaction time on the FePO4 synthesized for the LiFePO4/C cathode material of lithium ion batteries

Ma¹,

Zhao²,

Zhang³

2015

Proceedings of the 2015 4th International Conference on Computer, Mechatronics, Control and Electronic Engineering

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Abstract. Phase-pure, monoclinic, and nanostructured FePO 4 composites have been synthesized by a hydrothermal method at different waterbath reaction time and characterized by XRD, SEM. The results showed that calcination time have great influence on the FePO 4 composite. When the waterbath reaction time was 7 days, the LiFePO 4 /C composite showed high coulombic efficiency and excellent cyclabilities.

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“…Due to this drawback, LiFePO 4 has to be coated with conductive material before it can be used as cathode material for battery system. Synthesis process of cathode material can be done in various ways such as hydro thermal, coprecipitation, sol-gel, solid-state process etc [9,10]. The solid-state process is the most applicable method in battery industries.…”

Section: Introductionmentioning

confidence: 99%

The characteristic of carbon-coated LiFePO4 as cathode material for lithium ion battery synthesized by sol-gel process in one step heating and varied pH

Triwibowo¹,

Yuniarti²,

Suharyadi³

2014

AIP Conference Proceedings

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Abstract. This research has been done on the synthesis of carbon coated LiFePO 4 through sol-gel process. Carbon layer serves for improving electronic conductivity, while the variation of pH in the sol-gel process is intended to obtain the morphology of the material that may improve battery performance. LiFePO 4 /C precursors are Li 2 CO 3 , NH 4 H 2 PO 4 and FeC 2 O 4 .H 2 O and citric acid. In the synthesis process, consisting of a colloidal suspension FeC 2 O 4 .H 2 O and distilled water mixed with a colloidal suspension consisting of NH 4 H 2 PO 4 , Li 2 CO 3 , and distilled water. Variations addition of citric acid is used to control the pH of the gel formed by mixing two colloidal suspensions. Sol in this study had a pH of 5, 5.4 and 5.8. The obtained wet gel is further dried in the oven and then sintered at a temperature 700°C for 10 hours. The resulting material is further characterized by XRD to determine the phases formed. The resulting powder morphology is observed through SEM. Specific surface area of the powder was tested by BET, while the electronic conductivity characterized with EIS.

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A simple, cheap soft synthesis routine for LiFePO4 using iron(III) raw material

Cited by 68 publications

References 27 publications

Graphene wrapped LiFePO4/C composites as cathode materials for Li-ion batteries with enhanced rate capability

Graphene wrapped LiFePO4/C composites as cathode materials for Li-ion batteries with enhanced rate capability

Effect of reaction time on the FePO4 synthesized for the LiFePO4/C cathode material of lithium ion batteries

The characteristic of carbon-coated LiFePO4 as cathode material for lithium ion battery synthesized by sol-gel process in one step heating and varied pH

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