Porous Li2FeSiO4/C nanocomposite as the cathode material of lithium-ion batteries

Zheng, Zongmin; Wang, Yan; Ai, Zhang; Zhang, Tianran; Cheng, Fangyi; Tao, Zhanliang; Chen, Jun

doi:10.1016/j.jpowsour.2011.09.066

Cited by 178 publications

(110 citation statements)

References 31 publications

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“…The capacity retention reaches 135 mAh g À1 at rate C/16, and is stable over 40 cycles [222]. Porous Li 2 FeSiO 4 / C nanocomposite with 8.06 wt% carbon showed a capacity of 176.8 mAh g À1 at 0.5C in the first cycle and a reversible capacity of 132 mAh g À1 at 1C (1C ¼ 160 mA g À1 ) in the 50th cycle [223]. If the voltage range extends from 1.5 to 4.8 V, a capacity of 220 mAh g À1 has been reported at low current density 10 mA g À1 , but after three cycles, the capacity was already decreased to circa 190 mAh g À1 [224] [227,228] have been obtained for Li 2 FeSiO 4 annealed at 800 C, while another polymorph has been found upon quenching from 900 C to room temperature [229].…”

Section: Nasicon-like Compoundsmentioning

confidence: 97%

Polyanionic Compounds as Cathode Materials

et al. 2016

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Section: Nasicon-like Compoundsmentioning

confidence: 97%

Polyanionic Compounds as Cathode Materials

et al. 2016

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“…The crystal structure can be controlled by adjusting the synthetic methods. Generally, the Pmn2 1 phase is prepared by hydrothermal method, and P2 1 /n and Pmnb phase are synthesized via solid state reactions at different tenperatures (600-800°C for P2 1 /n and ≥900°C for Pmnb) [31][32][33][34]. Dominko's group [31] demonstrated that the stronger Fe-O bonds resulted in a lower Fe 2+ /Fe 3+ redox potential.…”

Section: Inorganic Cathode Materialsmentioning

confidence: 99%

“…Therefore, intensive efforts are focused on solving the above mentioned difficulties. According to recent published papers, the effective methods include carbon modification, ion-doping, and nanocrystallization [15,32].…”

Section: Inorganic Cathode Materialsmentioning

confidence: 99%

“…Our group synthesized porous LFSO@C composite through tartaric-acid assisted sol-gel method. The as-prepared particles had a size of 5−20 nm [32]. The optimized sample showed the discharge capacities of ~180 mA h g −1 at 0.5 C and 102 mA h g −1 at 5 C. The uniformly dispersed nanoparticles with homogeneous carbon coating are the key factor for the high performance.…”

Section: +mentioning

confidence: 99%

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Inorganic & organic materials for rechargeable Li batteries with multi-electron reaction

Zhang

Tao

2014

Sci. China Mater.

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where ΔG is the Gibbs free energy difference, n the transfer electron number, F the Faraday constant, M w the molecular weight. It is very important to choose the electrode materials with high specific capacity and suitable voltage. The high specific capacity is attributed to high transfer electron number and low molecular weight. Fig. 1 Rechargeable Li batteries as electrochemical energy storage and conversion devices are continuously changing human life. In order to meet the increasing demand for energy and power density, it is essential and urgent to exploit the electrode materials with high capacity and fast charge transfer (for Li-ion and Li-S batteries) and electrocatalysts with high activity (for rechargeable Li-O 2 batteries). The high capacity is attributed to high electron transfer number and low molecular weight of the electrode materials. Combined with proper nanostructure design, the electronic transfer and ionic conductivity will be improved. This review summarizes recent efforts to apply electrode materials for Li-ion batteries with multi-electron reaction, Li-S batteries, and efficient electrocatalysts for Li-O 2 batteries. The methods to enhance the cycling and rate performance have been discussed in detail. Advanced rechargeable Li batteries with multi-electron reaction will become the research emphasis in the future.

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“…With respect to the first two, some approaches to minimize the particle size and coat the electron-conducting phase using more conductive materials have been carried out and found to be effective in improving both the electronic conductivity and lithium ion diffusion rate of LiFePO 4 [6][7][8][9][10][11][12]. In general, coating electrode materials with carbon could improve the electronic conductivity between particles and provide electronic tunnels.…”

Section: Introductionmentioning

confidence: 99%

Surfactant effect on synthesis of core-shell LiFePO4/C cathode materials for lithium-ion batteries

Wang

Zheng

Huang

et al. 2014

J Solid State Electrochem

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Nanospherical LiFePO 4 particle with a uniform carbon coating layer (core-shell structure expressed as LiFePO 4 /C) in the presence of both low-cost FeOOH as iron resource and polyoxyethylene sorbitan monopalmitate (Tween 40) as surfactant is synthesized via a solid-liquid reaction milling method consisting of high-energy milling and pyrolysis steps. X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (SEM), and transmission electron microscopy (TEM) are used for structure, morphology, and composition characterization. Both XRD and FTIR results confirm the existence of interactions between surfactant molecules and precursor, which can benefit the formation of the core-shell structure with an average particle size of about 200 nm and a high tap density of 1.7 g cm −3 . The electrochemical properties of as-prepared LiFePO 4 /C as cathode material are investigated by electrochemical impedance spectroscopy (EIS), charge-discharge, and cycling tests. The results show that the LiFePO 4 /C can achieve high discharge capacities of 163.6 and 131.3 mAh g −1 under 0.1°C at room temperature (25°C) and sub-zero temperature (−20°C), respectively, due to its improved conductivity. In addition, the material also shows an excellent cycling performance with capacity retention of 98.8 % (0.1°C) after 120 cycles at 25°C and 102.9 mAh g −1 at the ends of the 200th cycle corresponding to a fading of 0.01 % per cycle.

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Porous Li2FeSiO4/C nanocomposite as the cathode material of lithium-ion batteries

Cited by 178 publications

References 31 publications

Polyanionic Compounds as Cathode Materials

Polyanionic Compounds as Cathode Materials

Inorganic & organic materials for rechargeable Li batteries with multi-electron reaction

Surfactant effect on synthesis of core-shell LiFePO4/C cathode materials for lithium-ion batteries

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