Comparative studies of laser annealing technique and furnace annealing by X-ray diffraction and Raman analysis of lithium manganese oxide thin films for lithium-ion batteries

Pröll, J.; Weidler, Peter G.; Kohler, Robert Ε.; Mangang, A.; Heißler, Stefan; Seifert, Hans Jürgen; Pfleging, Wilhelm

doi:10.1016/j.tsf.2013.01.015

Cited by 11 publications

(7 citation statements)

References 58 publications

(78 reference statements)

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“…As expected, post-deposition annealing at 800 C induces a slight Li loss in the spinel structure according to lattice parameter evolution. But, contrary to some authors, we have not detected additional crystallized impurity phases such as Li 2 MnO 3 [30]. The corresponding grain size was estimated from the Scherrer's law and was found to be in the 10-40 nm range.…”

Section: Structure and Morphology Of Thin Filmscontrasting

confidence: 99%

“…The electrochemical response of Li-rich spinel films is thus highly dependent on the annealing temperature. Some authors have suggested that the formation of electrochemically inactive Li 2 MnO 3 [30] or Mn 3 O 4 phase which forms from 800 C may suppress the Li ion migration [33]. Consequently, the irreversibility and the capacity fading for thin films annealed at higher temperatures probably result from the presence of large grains (micron size) in these films (Fig.…”

Section: Structure and Morphology Of Thin Filmsmentioning

confidence: 99%

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Lithium-rich manganese oxide spinel thin films as 3 V electrode for lithium batteries

Cotte

Pecquenard

Cras

et al. 2015

Electrochimica Acta

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Section: Structure and Morphology Of Thin Filmscontrasting

confidence: 99%

Section: Structure and Morphology Of Thin Filmsmentioning

confidence: 99%

Lithium-rich manganese oxide spinel thin films as 3 V electrode for lithium batteries

Cotte

Pecquenard

Cras

et al. 2015

Electrochimica Acta

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“…38 On the other hand, the empty tetrahedral 8a sites in the lithium-deficient spinel could be partially occupied by a transition metal, thereby creating a rocksalt phase. 40,44 Table 1 summarizes relevant information obtained from the refinement of the XRD patterns of the spinel material prepared at different cooling rates (Figure 4). For all spinel materials, the calculated crystallite size of approximately 40 nm from peak 111 did not significantly vary.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Kinetic Control of the Li_0.9Mn_1.6Ni_0.4O₄ Spinel Structure with Enhanced Electrochemical Performance

Vásquez

Rosero-Navarro

Miura

et al. 2021

ACS Appl. Mater. Interfaces

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The development of more sustainable societies has become an urgent goal worldwide. Electrical batteries are currently seen as one of the most important energy storage technologies for the development of decarbonized societies. However, many lithium-ion battery manufacturers currently utilize cobalt, a toxic and hazardous mineral, in their batteries. Lithium-deficient manganese nickel oxide spinels are considered promising candidates owing to their high potential and environmental friendliness. Their electrochemical performance highly depends on their average and local structures, such as phase purities, lattice parameters, and cation sites. Thus, a synthesis protocol should be designed to control these structural parameters to improve their electrochemical performance. In this study, we controlled the average and local structures of Li 0.9 Mn 1.6 Ni 0.4 O 4 spinels obtained by co-precipitation by optimizing their cooling rates. Highresolution techniques, including transmission electron microscopy, synchrotron X-ray diffraction, and Auger-composition analysis combined with density functional theory calculations, X-ray absorption spectroscopy, and electrochemical analysis, were used to understand the average and local structural variations and their effects on the electrochemical properties. As a result, the control of oxygen diffusion at different cooling rates can promote the rearrangement of the structure, resulting in a cation-disordered spinel with minimal variations in lattice parameters and composition. Excellent electrochemical properties were noted in the cation-disordered spinel with high crystallinity and a slightly oxygen-rich surface produced via optimized cooling rates.

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“…Both scenario types could find application in battery manufacturing. For example, the pure laser annealing of compact thin film electrodes was developed as versatile tool for adjusting battery-active crystalline phases [28][29][30]. On the other side, cold ablation by ultrafast laser direct writing could be applied to create advanced 3D electrode architectures.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond Laser Processing of Thick Film Cathodes and Its Impact on Lithium-Ion Diffusion Kinetics

Pfleging

Gotcu-Freis

2019

Applied Sciences

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Quantitative experiments of lithiation/delithiation rates were considered for a better understanding of electrochemical intercalation/deintercalation processes in laser structured thick film cathodes. Besides galvanostatic cycling for evaluation of specific discharge capacities, a suitable quantitative approach for determining the rate of Li-ion insertion in the active material and the rate of Li-ion transport in the electrolyte is expressed by chemical diffusion coefficient values. For this purpose, the galvanostatic intermittent titration technique has been involved. It could be shown that laser structured electrodes provide an enhanced chemical diffusion coefficient and an improved capacity retention at high charging and discharging rates.

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Comparative studies of laser annealing technique and furnace annealing by X-ray diffraction and Raman analysis of lithium manganese oxide thin films for lithium-ion batteries

Cited by 11 publications

References 58 publications

Lithium-rich manganese oxide spinel thin films as 3 V electrode for lithium batteries

Lithium-rich manganese oxide spinel thin films as 3 V electrode for lithium batteries

Kinetic Control of the Li_0.9Mn_1.6Ni_0.4O₄ Spinel Structure with Enhanced Electrochemical Performance

Femtosecond Laser Processing of Thick Film Cathodes and Its Impact on Lithium-Ion Diffusion Kinetics

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Comparative studies of laser annealing technique and furnace annealing by X-ray diffraction and Raman analysis of lithium manganese oxide thin films for lithium-ion batteries

Cited by 11 publications

References 58 publications

Lithium-rich manganese oxide spinel thin films as 3 V electrode for lithium batteries

Lithium-rich manganese oxide spinel thin films as 3 V electrode for lithium batteries

Kinetic Control of the Li0.9Mn1.6Ni0.4O4 Spinel Structure with Enhanced Electrochemical Performance

Femtosecond Laser Processing of Thick Film Cathodes and Its Impact on Lithium-Ion Diffusion Kinetics

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Kinetic Control of the Li_0.9Mn_1.6Ni_0.4O₄ Spinel Structure with Enhanced Electrochemical Performance