Electrochemical Characteristics of Spinel Phase LiMn2 O 4‐Based Cathode Materials Prepared by the Pechini Process: Influence of Firing Temperature and Dopants

Liu, W.; Kowal, K.; Farrington, G. C.

doi:10.1149/1.1837257

Cited by 101 publications

(51 citation statements)

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“…The energies of (001) and (111) [44][45][46] which will lead to poor electrochemical performance. 44,45 We should note that above conclusions are for synthesis of LMO under equilibrium conditions …”

Section: Iii3 Stability Diagram For Bulk Lmo and Lmo Surfacesmentioning

confidence: 99%

Surface phase diagram and stability of (001) and (111)LiMn2O4spinel oxides

2015

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The (001) and (111) surface structures of the LiMn 2 O 4 (LMO) spinel are examined using density functional theory (DFT) calculations within the generalized gradient approximation (GGA)+U approach. In order to clarify discrepancies in the literature for previous DFT calculations of these surfaces, we first carefully study the effects of surface termination/reconstruction, slab construction, and relaxation schemes, as well as magnetic ordering and U values for Mn on the calculated surface energies of LMO. We explain these discrepancies and show that the relaxation scheme and surface reconstruction play the key role in determining the relative stability of (001) and (111) surfaces. We have further analyzed the thermodynamic stability of LMO surfaces as a function of oxygen and lithium chemical potentials. We have found that the ratio of (001)

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Section: Iii3 Stability Diagram For Bulk Lmo and Lmo Surfacesmentioning

confidence: 99%

Surface phase diagram and stability of (001) and (111)LiMn2O4spinel oxides

2015

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“…Other methods, such as the freeze-drying method [4], polyaspartic-acid-pyrolysis method [71], melt-impregnation method [72,73], Pechini method [74,75], liquid source misted chemical deposition (LSMCD) [76], spray-drying method [28], rheological phase reaction [77] are also used to prepare doped LiMn 2 O 4 .…”

Section: Other Methodsmentioning

confidence: 99%

Preparation and Doping Mode of Doped LiMn2O4 for Li-Ion Batteries

et al. 2013

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Spinel LiMn 2 O 4 is an appealing candidate cathode material for Li-ion rechargeable batteries, but it suffers from severe capacity fading, especially at higher temperature (55 °C) during discharging/charging. In recent years, many attempts have been made to synthesize modified LiMn 2 O 4 . This paper reviews the recent research on the preparation and doping modes of doped LiMn 2 O 4 for modifying the LiMn 2 O 4. We firstly compared preparation methods for doped spinel LiMn 2 O 4 , such as solid state reactions and solution synthetic methods. Then we mainly discuss doping modes reported in recent years, such as bulk doping, surface doping and combined doping. A comparison of different doping modes is also provided. The research shows that the multiple-ion doping and combined doping modes of LiMn 2 O 4 used in Li-ion battery are excellent for improving different aspects of the electrochemical performance which holds great promise in the future. From this paper, we also can see that spinel LiMnO 4 as an attractive candidate cathode material for Li-ion batteries.

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“…Therefore, to overcome these disadvantages, various new techniques have been developed. Such techniques are based on the processes of coprecipitation, ion-exchange, or thermal decomposition at low temperatures of appropriate organic precursors obtained by sol-gel [10], Pechini [11], freeze-drying [12], melt-impregnation [13], or citric acid gel [14] methods. These methods lead to homogeneous spinel materials with small particle size at the low cost of expensive reagents and process complexity.…”

Section: Introductionmentioning

confidence: 99%

A novel approach to synthesize lithium ion battery spinel cathode materials

Suryakala

Marikkannu

Kalaignan

et al. 2007

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Spinel LiMn 2 O 4 and LiMg 0.2 Mn 1.8 O 4 have been synthesized by a soft chemistry method using citric acid as the chelating agent and acryl amide as the gelling agent. This technique offers better homogeneity, preferred surface morphology, reduced heat treatment conditions, sub-micron-sized particles, and better crystallinity. The synthesized spinel materials are characterized by X-ray diffraction, scanning electron microscopy, cyclic voltammetry, and charge-discharge studies.

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Electrochemical Characteristics of Spinel Phase LiMn2 O 4‐Based Cathode Materials Prepared by the Pechini Process: Influence of Firing Temperature and Dopants

Cited by 101 publications

References 0 publications

Surface phase diagram and stability of (001) and (111)LiMn2O4spinel oxides

Surface phase diagram and stability of (001) and (111)LiMn2O4spinel oxides

Preparation and Doping Mode of Doped LiMn2O4 for Li-Ion Batteries

A novel approach to synthesize lithium ion battery spinel cathode materials

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