MW-assisted synthesis of LiFePO4 for high power applications

Beninati, Sabina; Damen, Libero; Mastragostino, Marina

doi:10.1016/j.jpowsour.2008.02.066

Cited by 77 publications

(34 citation statements)

References 23 publications

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“…Alternatively, significant effort has been devoted to coating the LFP surfaces with electrically conductive materials, such as amorphous carbon and conducting polymers to ARTICLE enhance the electrical conductivity of LFP surfaces [27][28][29][30][31][32] . Recent studies have adopted rGO or GO to cover the LFP surfaces [16][17][18][19] .…”

Section: Resultsmentioning

confidence: 99%

Graphene-modified LiFePO4 cathode for lithium ion battery beyond theoretical capacity

Lin

et al. 2013

Nat Commun

500

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The specific capacity of commercially available cathode carbon-coated lithium iron phosphate is typically 120-160 mAh g À 1 , which is lower than the theoretical value 170 mAh g À 1 . Here we report that the carbon-coated lithium iron phosphate, surface-modified with 2 wt% of the electrochemically exfoliated graphene layers, is able to reach 208 mAh g À 1 in specific capacity. The excess capacity is attributed to the reversible reduction-oxidation reaction between the lithium ions of the electrolyte and the exfoliated graphene flakes, where the graphene flakes exhibit a capacity higher than 2,000 mAh g À 1 . The highly conductive graphene flakes wrapping around carbon-coated lithium iron phosphate also assist the electron migration during the charge/discharge processes, diminishing the irreversible capacity at the first cycle and leading to B100% coulombic efficiency without fading at various C-rates. Such a simple and scalable approach may also be applied to other cathode systems, boosting up the capacity for various Li batteries.

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Section: Resultsmentioning

confidence: 99%

Graphene-modified LiFePO4 cathode for lithium ion battery beyond theoretical capacity

Lin

et al. 2013

Nat Commun

500

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“…The one-pot synthesis was developed for preparing LiMPO 4 /C (M ¼ Mn, Fe, Co) nanocomposites by a microwave assisted hydrothermal process involving hydrothermal carbonization of glucose [61]. Recently, Beninati et al [62] and Wang et al [63] reported the synthesis of LiFePO 4 by irradiating the solid-state raw materials with carbon in a domestic microwave oven. An in situ coating of carbon on LiFePO 4 was attempted during the MW-HT process, employing glucose as the carbon source.…”

Section: Hydrothermal Methodsmentioning

confidence: 99%

Nanotechnology for Energy Storage

et al. 2016

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Nanomaterials of metal oxides have been intensively studied as anode and cathode materials for lithium-ion batteries (LiBs) aimed at achieving higher specific capacities and high power density. It is worth pointing out that the word "nanotechnology" has become very popular and is used to describe many types of research where the characteristic dimensions are much less than 1 μm. For example, continued improvements in lithography to design computer components have resulted in line widths that are less than one micron: this work is often called "nanotechnology." Many of the exponentially improving trends in computer hardware capability have remained steady for the last 50 years. Today "nanosciences" are fairly widespread with the belief that these trends are likely to continue for at least several years; however, new aspects are now considered in the field of energy transformation. In this respect, the classic 1959 article "There's plenty of room at the bottom" by Richard P. Feynman discusses the limits of miniaturization and forecast the ability to ". . .arrange the atoms the way we want; the very atoms, all the way down!" [1]. Nano-structured materials are distinguished from conventional polycrystalline materials by the size of the structural entities that comprises them, microstructures comprising nanoscale domains in at least one dimension. The ability to control a material's structure and composition at the nano-level has demonstrated that materials and devices having properties intrinsically different from their polycrystalline counterparts can be fabricated. As tailoring of fundamental properties becomes possible at the atomic level, the prospect of developing novel materials and devices with new applications become viable.Conventional rechargeable Li batteries exhibit rather poor rate performance, even compared with old technologies such as lead-acid [2]. Achieving high rate rechargeable Li-ion batteries depends ultimately of the dimension of the active particles for both negative and positive electrodes. One of the prospective solutions for the preparation of electrodes with high power density is the choice of

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“…However, the main problem arises from the nonuniformity of components in the precursor, especially after the addition of carbon. Recently, Beninati et al [48] and Wang et al [49] reported the synthesis of LiFePO 4 by irradiating the solid-state raw materials with carbon in a domestic microwave oven. However, they were unable to control the particle size, and the electrochemical properties were not as good as expected.…”

Section: Microwave Synthesismentioning

confidence: 99%