Fast Interfacial Ionic Conduction in Nanostructured Glass Ceramics

Schirmeisen, André; Taskiran, Ahmet; Fuchs, Harald; Bracht, H.; Murugavel, Sevi; Roling, Bernhard

doi:10.1103/physrevlett.98.225901

Cited by 64 publications

(46 citation statements)

References 15 publications

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“…Below room temperature, the Arrhenius fit yields an activation energy of 0.04 and 0.08 eV for the two investigated samples, which indicate ionic movements at the interfaces with activation energies of only a few times k B T [32]. This result for the interfacial activation energy clearly shows that the interfacial areas do not form percolating pathways through the glass ceramic.…”

Section: Nanostructured Solid Ion Conductorsmentioning

confidence: 49%

Ion Jump Dynamics in Nanoscopic Subvolumes Analyzed by Electrostatic Force Spectroscopy

Schirmeisen¹,

Taskiran

Bracht

et al. 2010

Zeitschrift Für Physikalische Chemie

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Ion Dynamics / Electrostatic Atomic Force MicroscopyA nanoscopic technique based on electrostatic force spectroscopy in the time domain is introduced. This technique is used to characterize the ion dynamics in nanoscale subvolumes of solid electrolytes. Nanoscopic polarization spots can be created and directly visualized, and their time evolution can be studied. In the case of partially crystallized glass ceramics, the dynamic processes in different phases (glassy, crystalline and interface) can be distinguished and their activation energies and pre-exponential factors can be quantified. By applying grid-type spectroscopic measurements, maps of the local relaxation strength are obtained, giving information about the spatial distribution of the glassy and crystalline phase.

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Section: Nanostructured Solid Ion Conductorsmentioning

confidence: 49%

Ion Jump Dynamics in Nanoscopic Subvolumes Analyzed by Electrostatic Force Spectroscopy

Schirmeisen¹,

Taskiran

Bracht

et al. 2010

Zeitschrift Für Physikalische Chemie

Self Cite

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“…suggested that the fast ionic conduction of mobile ions in nanostructured LiAlSiO 4 glass ceramics is caused by the local movement of ions at the interfaces between the glassy phase and embedded crystallites. The existence of an electrical relaxation process with a very low activation energy, which is absent in pure LiAlSiO 4 glass, has been demonstrated by time-domain electrostatic force spectroscopy 18 . Actually, we observed the formation of a nanocrystalline phase in the diffraction pattern after the annealing, which means that the Bragg peaks were deformed, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Pair distribution function analysis of sulfide glassy electrolytes for all-solid-state batteries: Understanding the improvement of ionic conductivity under annealing condition

Shiotani

Ohara

Tsukasaki

et al. 2017

Sci Rep

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In general, the ionic conductivity of sulfide glasses decreases with their crystallization, although it increases for a few sulphide glasses owing to the crystallization of a highly conductive new phase (e.g., Li7P3S11: 70Li2S-30P2S5). We found that the ionic conductivity of 75Li2S-25P2S5 sulfide glass, which consists of glassy and crystalline phases, is improved by optimizing the conditions of the heat treatment, i.e., annealing. A different mechanism of high ionic conductivity from the conventional mechanism is expected in the glassy phase. Here, we report the glassy structure of 75Li2S-25P2S5 immediately before the crystallization by using the differential pair distribution function (d-PDF) analysis of high-energy X-ray diffraction. Even though the ionic conductivity increases during the optimum annealing, the d-PDF analysis indicated that the glassy structure undergoes no structural change in the sulfide glass-ceramic electrolyte at a crystallinity of 33.1%. We observed the formation of a nanocrystalline phase in the X-ray and electron diffraction patterns before the crystallization, which means that Bragg peaks were deformed. Thus, the ionic conductivity in the mixture of glassy and crystalline phases is improved by the coexistence of the nanocrystalline phase.

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“…It is known that the interfacial region between two oxides possesses high excess free energies which would lead to rich structural defects and changes in lattice position. 36,37 The interface strain effects and the influences of grain sizes and grain orientations are negligible in our multilayer. It has been reported that the activation energy for hopping oxygen vacancy in electrolyte would be lowered by disordered interfacial microstructures.…”

Section: Resultsmentioning

confidence: 95%

Fabrication of high performance oxygen sensors using multilayer oxides with high interfacial conductivity

Yao

Liu

et al. 2016

J. Mater. Chem. A

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The effective enhancement of ionic conductivity for solid oxide electrolytes by manipulating the multilayered hetero-nanostructures has been recognized for more than a decade; however, such fantastic nanostructure has not been applied for practical application yet. Here we fabricated Ce 0.8 Sm 0.1 Nd 0.1 O 2-δ /Al 2 O 3 (SNDC/AO) multilayered electrolyte materials with high oxygen ionic conductivity and explored their applications in oxygen sensors with low operating temperature. The multilayer oxides electrolyte shows a conductivity of 2 orders of magnitude higher than that of traditional yittria-stabilized zirconia (YSZ) ceramics at 400 °C, which endows the sensors with high 2 performances including rapid response (~0.1 s), high sensibility (down to 1 vol.%) and high cycling stability (no performance degradation after 1000 cycles), and most importantly, low operating temperature (200 °C lower relative to the YSZ-based sensors). The excellent performances of our multilayered electrolytes can be attributed to their high interfacial conductivity and low activation energy which might be related to the structurally highly disordered microstructures. This study shows good prospects for the efficient and practical use of multilayered oxide based electrolytes for a range of applications including sensors, oxygen separation, solid oxide fuel cells (SOFCs) and solid oxide electrolysis cells (SOECs). IntroductionOxygen sensors, which can effectively detect oxygen concentration, have been widely used to control the fuels combustion process for applications such as vehicles, aerospace and thermal power generation. 1-4 Effective fuels combustion based on the conventional high-temperature oxygen sensors plays significant roles in increasing energy efficiency and reducing pollutant emission. 5,6 However, to effectively operate sensors at low temperatures such as during the start-up of the cold engines still remains a great challenge. Previous studies showed that miniaturized sensors possess lower operating temperature and excellent performances compared with their macro counterparts. 2,4,7 For example, The sandwich-like microbar structure which consists of two multilayered electrolytes bonded face-to-face without removing substrates is designed to enable an easy alignment of heterointerfaces.The generated fast ion transport pathways, i.e. the heterointerfaces, lead to high ionic conductivity in the current direction of the sensors and thus can reduce the operation temperature. This strategy can successfully overcome the aforementioned key challenge for the practical application of multilayered 13 can be transformed into digital signals of '0' and '1', respectively. Furthermore, it can act as a switch to control the combustion processes in practical applications, including internal combustion engines, industrial boilers and metallurgical heat-treatment furnaces. ConclusionsIn conclusion, we successfully fabricated multilayered solid electrolyte with a unique microbar structure which is facile to be integrated into a micro oxyge...

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Fast Interfacial Ionic Conduction in Nanostructured Glass Ceramics

Cited by 64 publications

References 15 publications

Ion Jump Dynamics in Nanoscopic Subvolumes Analyzed by Electrostatic Force Spectroscopy

Ion Jump Dynamics in Nanoscopic Subvolumes Analyzed by Electrostatic Force Spectroscopy

Pair distribution function analysis of sulfide glassy electrolytes for all-solid-state batteries: Understanding the improvement of ionic conductivity under annealing condition

Fabrication of high performance oxygen sensors using multilayer oxides with high interfacial conductivity

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