Nanoanalysis and Ion Conductivity of Thin Film Battery Materials

Schmitz, Guido; Abouzari, R.; Berkemeier, Frank; Gallasch, Tobias; Greiwe, G.; Stockhoff, T.; Wunde, F.

doi:10.1524/zpch.2010.0055

Cited by 7 publications

(7 citation statements)

References 39 publications

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“…Hu et al 260 and Gorman et al 262 used APT to map atomic distributions around heterojunctions in semi-conductor solar cell materials, while Cojocaru-Mire ´din et al 261 applied APT tomography to investigate impurity distributions. Similar measurements have been demonstrated for LiCoO 2 thin films deposited on a tungsten substrate, 263 which could aid in the development of thin film batteries. Potential applications of APT could include the analysis of grain boundaries in the ion conducting ceramics used as SOFC electrolytes and the investigation of contamination and secondary phases in SOFCs.…”

Section: Fuel Cellssupporting

confidence: 70%

Three-dimensional microstructural imaging methods for energy materials

Cocco

Nelson

Harris

et al. 2013

Phys. Chem. Chem. Phys.

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Advances in the design of materials for energy storage and conversion (i.e., "energy materials") increasingly rely on understanding the dependence of a material's performance and longevity on three-dimensional characteristics of its microstructure. Three-dimensional imaging techniques permit the direct measurement of microstructural properties that significantly influence material function and durability, such as interface area, tortuosity, triple phase boundary length and local curvature. Furthermore, digital representations of imaged microstructures offer realistic domains for modeling. This article reviews state-of-the-art methods, across a spectrum of length scales ranging from atomic to micron, for three-dimensional microstructural imaging of energy materials. The review concludes with an assessment of the continuing role of three-dimensional imaging in the development of novel materials for energy applications.

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Section: Fuel Cellssupporting

confidence: 70%

Three-dimensional microstructural imaging methods for energy materials

Cocco

Nelson

Harris

et al. 2013

Phys. Chem. Chem. Phys.

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“…While mobility of species during atom probe analysis is undesired when aiming for microstructural characterisation (cf. Schmitz et al (2010); Santhanagopalan et al (2015); Devaraj et al (2015); Maier et al (2016)) it offers a strategy for controlled specimen manipulation in an atom probe.…”

Section: Introductionmentioning

confidence: 99%

In SituAtom Probe Deintercalation of Lithium-Manganese-Oxide

et al. 2017

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Atom probe tomography is routinely used for the characterization of materials microstructures, usually assuming that the microstructure is unaltered by the analysis. When analyzing ionic conductors, however, gradients in the chemical potential and the electric field penetrating dielectric atom probe specimens can cause significant ionic mobility. Although ionic mobility is undesirable when aiming for materials characterization, it offers a strategy to manipulate materials directly in situ in the atom probe. Here, we present experimental results on the analysis of the ionic conductor lithium-manganese-oxide with different atom probe techniques. We demonstrate that, at a temperature of 30 K, characterization of the materials microstructure is possible without measurable Li mobility. Also, we show that at 298 K the material can be deintercalated, in situ in the atom probe, without changing the manganese-oxide host structure. Combining in situ atom probe deintercalation and subsequent conventional characterization, we demonstrate a new methodological approach to study ionic conductors even in early stages of deintercalation.

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“…[15] Atom probe tomography (APT)i samethod with elementindependent detection efficiencyf or Li and Mn, and it is thus suitable for characterizationo fLMO. It provides 3D chemical information of solids with sub-nanometer spatial resolution by combining atomic-scale microscopy and singleatom/molecule time-of-flight spectroscopy.T he fundamental mechanism of APT is field evaporation of surface atoms from nanoscopic needle-shaped samples.A PT studies have been performed on materials such as LiCoO 2 , [16] Li 0. 26 Ni 0.…”

Section: Introductionmentioning

confidence: 99%

Three‐Dimensional Microstructural Characterization of Lithium Manganese Oxide with Atom Probe Tomography

et al. 2016

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The microstructure of the active material of Li‐ion batteries has a crucial influence on local ion‐transport processes but is not yet well characterized. Atom probe tomography (APT), a method combining sub‐nanometer spatial resolution with sub‐parts‐per‐thousand chemical resolution is well suited for 3 D microstructural characterization. Herein, the results of the characterization of lithium (nickel)manganese oxides [L(N)MO] with APT are presented. Structural and chemical defects of different dimensions such as the segregation of Na impurities to grain boundaries and the appearance of a Ni‐rich foreign phase are detected. Furthermore, a lamellar microstructure correlated to fluctuations in the local Li content was observed, and its influence on Li transport in the material is discussed. In defect‐free regions, the lattice planes of LMO are reconstructed for the first time, and the high spatial resolution of APT is revealed. Thus, the results demonstrate the potential of APT for the 3 D microstructural characterization of LMO.

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Nanoanalysis and Ion Conductivity of Thin Film Battery Materials

Cited by 7 publications

References 39 publications

Three-dimensional microstructural imaging methods for energy materials

Three-dimensional microstructural imaging methods for energy materials

In SituAtom Probe Deintercalation of Lithium-Manganese-Oxide

Three‐Dimensional Microstructural Characterization of Lithium Manganese Oxide with Atom Probe Tomography

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