In situ LiFePO4 nano-particles grown on few-layer graphene flakes as high-power cathode nanohybrids for lithium-ion batteries

Longoni, Gianluca; Panda, Jaya Kumar; Gagliani, Luca; Brescia, Rosaria; Manna, Liberato; Bonaccorso, Francesco; Pellegrini, Vittorio

doi:10.1016/j.nanoen.2018.07.013

Cited by 62 publications

(27 citation statements)

References 86 publications

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“…3a). The satisfactory small particle size is conducive to speeding up the extraction and embedding of Li + in the process of electrochemical reaction by decreasing the transmission path of Li ions, shortening the transportation time, and ultimately endowing the material with an excellent rate performance [42][43][44]. In addition, such a small particle size of the cathode material endows it with a large specific surface area, which is instrumental in the complete interpenetration between the electrode and electrolyte, thus promoting the adequate diffusion of Li ions [45].…”

Section: Resultsmentioning

confidence: 99%

A unique co-recovery strategy of cathode and anode from spent LiFePO4 battery

Meng

Zhao

et al. 2021

Sci. China Mater.

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Along with the explosive growth in the market of new energy electric vehicles, the demand for Li-ion batteries (LIBs) has correspondingly expanded. Given the limited life of LIBs, numbers of spent LIBs are bound to be produced. Because of the severe threats and challenges of spent LIBs to the environment, resources, and global sustainable development, the recycling and reuse of spent LIBs have become urgent. Herein, we propose a novel green and efficient direct recycling method, which realizes the concurrent reuse of LiFePO 4 (LFP) cathode and graphite anode from spent LFP batteries. By optimizing the proportion of LFP and graphite, a hybrid LFP/ graphite (LFPG) cathode was designed for a new type of dualion battery (DIB) that can achieve co-participation in the storage of both anions and cations. The hybrid LFPG cathode combines the excellent stability of LFP and the high conductivity of graphite to exhibit an extraordinary electrochemical performance. The best compound, i.e., LFP:graphite = 3:1, with the highest reversible capacity (~130 mA h g −1 at 25 mA g −1 ), high voltage platform of 4.95 V, and outstanding cycle performance, was achieved. The specific diffusion behavior of Li + and PF 6 − in the hybrid cathode was studied using electrode kinetic tests, further clarifying the working mechanism of DIBs. This study provides a new strategy toward the large-scale recycling of positive and negative electrodes of spent LIBs and establishes a precedent for designing new hybrid cathode materials for DIBs with superior performance using spent LIBs.

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Section: Resultsmentioning

confidence: 99%

A unique co-recovery strategy of cathode and anode from spent LiFePO4 battery

Meng

Zhao

et al. 2021

Sci. China Mater.

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“…The charge transfer resistance is 151.5 and 183 Ω before and after 50 cycles, respectively. The small potential difference (ΔE = 1.095 V) and impedance change value (ΔR ct = 31.5 Ω) indicate that the rod-like α-LiFeO 2 has a good electronic conductivity [20][21][22]. The lithium-ion diffusion coefficient can be calculated using following equations [23]…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

A novel method for preparing α-LiFeO2 nanorods for high-performance lithium-ion batteries

Liu

2019

Ionics

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One-dimensional (1D) α-LiFeO 2 nanorods are successfully prepared via a low-temperature solid-state reaction from α-FeOOH nanorods synthesized by hydrothermal process and used as cathode materials in lithium-ion batteries. As cathode material for lithium-ion batteries, the nanorods can achieve a high initial specific capacity of 165.85 mAh/g at 0.1 C for which a high capacity retention of 81.65% can still be obtained after 50 cycles. The excellent performance and cycling stability are attributed to the unique 1D nanostructure, which facilitates the rapid electron exchange and fast lithium-ion diffusion between electrolyte and cathode materials. Keywords α-LiFeO 2 nanorod. Energy storage and conversion. Nanocrystalline materials. Cathode

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“…Recently, Li 2 FeSiO 4 composited with graphene attracts much attention due to the high mechanical and electronic properties and high specific capacity of graphene during charge/ discharge processes [8]. The two-dimensional structure of graphene with sp 2 hybridization carbon atoms promotes its super electronic conductivity, hence, increasing the kinetics of the redox reaction [15][16][17]. Besides, cation doping with Li 2-x M x FeSiO 4 formula (M = Mg, Y, Cr, Cu, Ni, etc.)…”

Section: Introductionmentioning

confidence: 99%

Synthesis and electrochemical characterization of F- and Cl-doped Li2FeSiO4 cathode material for lithium-ion battery

Tahertalari

Massoudi

et al. 2021

J Mater Sci: Mater Electron

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As a high-capacity cathode material with a considerable cycle life, lithium metal orthosilicates have attracted much attention. In this paper, Li 2 FeSiO 4 , Li 2-FeSiO 4-x Cl x and Li 2 FeSiO 4-x F x are successfully synthesized via solid-state method. Li 2 FeSiO 4-x F x is also composited with reduced graphene oxide (rGO). The X-ray diffraction patterns show 0.2% expansion in the lattice volume of Li 2 FeSiO 4-x F x and 0.7% shrinkage for Li 2 FeSiO 4-x Cl x due to the doping effect. Fourier-transform infrared spectroscopy also indicates a frequency shift for [SiO 4 ] 4and [LiO 4 ] functional groups due to ion doping. The SEM images confirm that rGO surrounded Li 2 FeSiO 4-x F x microparticles. The electrochemical performance illustrates a reversible ox/red reaction of Fe 2? /Fe 3? couple at the potential of 3/2.6 V for Li 2 FeSiO 4 , 3.5/2.9 V for Li 2 FeSiO 4-x F x , and 3.3/2.3 V for Li 2 FeSiO 4-x Cl x . Lithiation curves at 0.05C rate show the first specific capacity of 168 mAh g -1 for Li 2 FeSiO 4 with 84% retention after 25th cycles, 190 mAh g -1 for Li 2 FeSiO 4-x F x with 100% retention, and 120 mAh g -1 for Li 2 FeSiO 4-x Cl x with 73% retention. Li 2 FeSiO 4-x F x /rGO cathode delivers 265 mAh g -1 with 88% retention after 25th cycles.

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In situ LiFePO4 nano-particles grown on few-layer graphene flakes as high-power cathode nanohybrids for lithium-ion batteries

Cited by 62 publications

References 86 publications

A unique co-recovery strategy of cathode and anode from spent LiFePO4 battery

A unique co-recovery strategy of cathode and anode from spent LiFePO4 battery

A novel method for preparing α-LiFeO2 nanorods for high-performance lithium-ion batteries

Synthesis and electrochemical characterization of F- and Cl-doped Li2FeSiO4 cathode material for lithium-ion battery

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