Hydrothermal preparation of LiFePO4 nanocrystals mediated by organic acid

Ni, Jiangfeng; Morishita, Masao; Kawabe, Yoshiteru; Watada, Masaharu; Takeichi, Nobuhiko; Sakai, Tetsuo

doi:10.1016/j.jpowsour.2009.11.017

Cited by 136 publications

(64 citation statements)

References 32 publications

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“…TEM analysis revealed that the LFP nanowires grew along the c-axis, leading to facile Li + transport and a potentially high-rate response along the shortened b-and a-axis, while the carbon coating ensured adequate electrical conductivity and minimal aggregation throughout the electrode. LiFePO4/C/PPy Nanocrystals ~155 (0.1 C) ~155 (20) [438] LiFePO4/C Porous spheres 153 (0.1 C) ~150 (5) [439] LiFePO4/C Nanoparticles 126 (20 C) ~112 (1000) [440] LiFePO4/C Nanoplates ~165 (0.1 C) ~160 (50) [441] LiFePO4/C Nanocrystals ~160 (0.2 C) 158 (100) [442] LiFePO4/C Nanowires 150 (1 C) 146 (100) [392] LiFePO4/C Nanocomposite ~163 (0.1 C) 162 (100) [406] LiFePO4/C Nanoplates ~165 (0.1 C) ~165 (50) [402] LiFePO4/C Nanocomposite ~168 (0.1 C) ~160 (1100) [384] LiFePO4/C Nanorods ~160 (0.1 C) ~160 (30) [403] LiFePO4/CNT Nanocomposite ~160 (10 mA g -1 ) ~160 (10) [399] LiFePO4/GO Nanocomposite ~145 (1 C) ~145 (5) [443] LiFePO4/ZnO2 Particles ~140 (0.1 C) ~143 (100) [444] Li-ion performance (Fig. 32), was recorded over several discharge rates with a first discharge capacity of 169 mA h g -1 (between 2.5-4.3 V vs. Li/Li + ), and as much as 93 mA h g -1 at the high discharge rate of 10 C. Cycling of the LFP nanowires resulted in stable performance with 146 mA h g -1 obtained after 100 cycles at the C rate.…”

Section: Lifepo4 (Lfp)mentioning

confidence: 99%

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

et al. 2013

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Access to the full text of the published version may require a subscription. Rights © Tsinghua University Press and Springer-Verlag Berlin ABSTRACTThe performance of the lithium-ion cell is heavily dependent on the ability of the host electrodes to accommodate and release Li + ions from the local structure. While the choice of electrode materials may define parameters such as cell potential and capacity, the process of intercalation may be physically limited by the rate of solid-state Li + diffusion. Increased diffusion rates in lithium-ion electrodes may be achieved through a reduction in the diffusion path, accomplished by a scaling of the respective electrode dimensions.In addition, some electrodes may undergo large volume changes associated with charging and discharging, the strain of which, may be better accommodated through nanostructuring. Failure of the host to accommodate such volume changes may lead to pulverisation of the local structure and a rapid loss of capacity. In this review article, we seek to highlight a number of significant gains in the development of nanostructured lithium-ion battery architectures (both anode and cathode), as drivers of potential next-generation electrochemical energy storage devices.

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Section: Lifepo4 (Lfp)mentioning

confidence: 99%

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

et al. 2013

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“…[6] However, the diffusion necessary for a complete reaction needs the condition at high temperature for long-time. As the synthesis method at lower temperature, many methods such as hydrothermal method [7], sol-gel method [8,9], and splay pyrolysis method [10] are reported. In this study, using the hydrothermal process, the synthesis of LiFePO 4 composed of a fine particle was attempted.…”

Section: Lifepo 4 → LI 1-x Fepomentioning

confidence: 99%

Synthesis and Evaluation of Olivine Material Coated with Carbon

Togo

Nakahira

2017

MATEC Web Conf.

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Abstract. Lithium iron phosphate, LiFePO4, was synthesized by hydrothermal process and subsequently coated with carbon by the thermal decomposition of acetylene gas. The products were characterized by XRD, SEM, and TG-DTA. As-synthesized LiFePO4 was submicron sized plate-like particle. After heating at various temperature in nitrogen atmosphere, the particle size and the crystalline sizes were grown with increasing the heating temperature. Above 700°C, the grain growth was remarkably. Carbon coating temperature was set at 500-600°C because of fine particle and good crystallinity. As a carbon raw material, acetylene gas was flowing to the as-synthesized LiFePO4 in nitrogen atmosphere, and the LiFePO4/C composite was obtained. TG curves showed weight loss above 500°C, which was thought to be associated with carbon layer composition.

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“…In addition, for the electrode material, morphology is also the important factor for improvements in the reactivity and cycle performance as well as the particle size. Many studies on LiFePO 4 synthesis by hydrothermal reaction has been reported [10][11][12], and the morphology and particle size are well-known to be affected under synthetic parameters such as pH of reaction solution, reaction temperature, and reaction time. LiFePO 4 has one-dimensional Li + conduction pass, and the domino-cascade conduction model was suggested [13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Evaluation of Olivine Nanosheets from Layered Ammonium Iron Phosphate Monohydrate

Togo¹,

Nakahira²

2017

J Material Sci Eng

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The synthesis of novel microstructured LiFePO 4 with advantageous nanosheets for Li ion conductivity was attempted. Using layered NH 4 FePO 4 •H 2 O as raw material, LiFePO 4 nanosheet was synthesized by the hydrothermal process in LiCl solution. Prepared NH 4 FePO 4 •H 2 O was several tens micrometer sized sheet with about 200 nm in thickness. As Li ion resource, various LiCl solution like deionized water, ethanol, and ethylene glycol were prepared through subsequent hydrothermal process and the effect of a kind of solvents for LiCl solution on the microstructure of products treated by the hydrothermal process was investigated for LiFePO 4 nanosheets synthesis. The products of LiFePO 4 nanosheet were characterized by XRD, SEM, TEM, FT-IR and ICP. Regardless of a kind of solvents, LiFePO 4 nanosheet was composed of arranged nano-blocks, although the size and morphology of nano-blocks was different in each solvent.

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Hydrothermal preparation of LiFePO4 nanocrystals mediated by organic acid

Cited by 136 publications

References 32 publications

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

Evaluating the performance of nanostructured materials as lithium-ion battery electrodes

Synthesis and Evaluation of Olivine Material Coated with Carbon

Synthesis and Evaluation of Olivine Nanosheets from Layered Ammonium Iron Phosphate Monohydrate

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