Minimizing the Grain Boundary Resistance of Li-Ion-Conducting Oxide Electrolyte by Controlling Liquid-Phase Formation During Sintering

2018 ◽  
Vol 1 (11) ◽  
pp. 6303-6311 ◽  
Author(s):  
Toyoki Okumura ◽  
Sou Taminato ◽  
Tomonari Takeuchi ◽  
Hironori Kobayashi
Keyword(s):  
Liquid Phase ◽  
Grain Boundary ◽  
Phase Formation ◽  
Boundary Resistance ◽  
Li Ion ◽  
Ion Conducting ◽  
Oxide Electrolyte

Atomic-scale origin of the large grain-boundary resistance in perovskite Li-ion-conducting solid electrolytes

2014 ◽  
Vol 7 (5) ◽  
pp. 1638 ◽  
Author(s):  
Cheng Ma ◽  
Kai Chen ◽  
Chengdu Liang ◽  
Ce-Wen Nan ◽  
Ryo Ishikawa ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Solid Electrolytes ◽  
Boundary Resistance ◽  
Atomic Scale ◽  
Li Ion ◽  
Ion Conducting

Unravelling the structural and dynamical complexity of the equilibrium liquid grain-binding layer in highly conductive organic crystalline electrolytes

2018 ◽  
Vol 6 (10) ◽  
pp. 4394-4404 ◽  
Author(s):  
Prabhat Prakash ◽  
Jordan Aguirre ◽  
Megan. M. Van Vliet ◽  
Parameswara Rao Chinnam ◽  
Dmitriy A. Dikin ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Grain Boundary ◽  
Solid Electrolyte ◽  
Boundary Resistance ◽  
Bulk Solid ◽  
Dynamical Complexity ◽  
Surface Liquid

A nanolayer of surface liquid phase in equilibrium with the bulk solid is responsible for the low grain boundary resistance in the solid electrolyte LiCl·DMF, as supported by a combination of experiment, theory, and modelling.

On determining the height of the potential barrier at grain boundaries in ion-conducting oxides

2016 ◽  
Vol 18 (4) ◽  
pp. 3023-3031 ◽  
Author(s):  
Sangtae Kim ◽  
Seong K. Kim ◽  
Sergey Khodorov ◽  
Joachim Maier ◽  
Igor Lubomirsky
Keyword(s):  
Grain Boundary ◽  
Space Charge ◽  
Grain Boundaries ◽  
Potential Barrier ◽  
Boundary Resistance ◽  
Resistivity Ratio ◽  
Linear Diffusion ◽  
Conducting Oxides ◽  
Ion Conducting

Combining the linear diffusion and resistivity ratio models, one can distinguish the grain boundary resistance related to space charge from the resistance from other sources.

scholarly journals Influence of microstructure and crystalline phases on impedance spectra of sodium conducting glass ceramics produced from glass powder

2021 ◽  
Author(s):  
Mihails Kusnezoff ◽  
Dörte Wagner ◽  
Jochen Schilm ◽  
Christian Heubner ◽  
Björn Matthey ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Crystalline Phase ◽  
Glass Phase ◽  
Boundary Resistance ◽  
Phase Content ◽  
Impedance Spectra ◽  
Temperature Dependent ◽  
Crystalline Phases ◽  
Parent Glass ◽  
Ion Conducting

AbstractCrystallization of highly ionic conductive N5 (Na5YSi4O12) phase from melted Na3+3x-1Y1-xPySi3-yO9 parent glass provides an attractive pathway for cost-effective manufacturing of Na-ion conducting thin electrolyte substrates. The temperature-dependent crystallization of parent glass results in several crystalline phases in the microstructure (N3 (Na3YSi2O7), N5 and N8 (Na8.1Y Si6O18) phases) as well as in rest glass phase with temperature dependent viscosity. The electrical properties of dense parent glass and of compositions densified and crystallized at 700 °C, 800 °C, 900 °C, 1000 °C, and 1100 °C are investigated by impedance spectroscopy and linked to their microstructure and crystalline phase content determined by Rietveld refinement. The parent glass has high isolation resistance and predominantly electrons as charge carriers. For sintering at ≥ 900 °C, sufficient N5 phase content is formed to exceed the percolation limit and form ion-conducting pathways. At the same time, the highest content of crystalline phase and the lowest grain boundary resistance are observed. Further increase of the sintering temperature leads to a decrease of the grain resistance and an increase of grain boundary resistance. The grain boundary resistance increases remarkably for samples sintered at 1100 °C due to softening of the residual glass phase and wetting of the grain boundaries. The conductivity of fully crystallized N5 phase (grain conductivity) is calculated from thorough impedance spectra analysis using its volume content estimated from Rietveld analysis, density measurements and assuming reasonable tortuosity to 2.8 10−3 S cm−1 at room temperature. The excellent conductivity and easy processing demonstrate the great potential for the use of this phase in the preparation of solid-state sodium electrolytes.

Perovskite-Type Metal Oxides Exhibiting Negligible Grain Boundary Resistance to Total Electrical Conductivity

2011 ◽  
Vol 50 (2) ◽  
pp. 647-655 ◽  
Author(s):  
Tania Pannu ◽  
Kanwar Gulsher Singh Pannu ◽  
Venkataraman Thangadurai
Keyword(s):  
Electrical Conductivity ◽  
Grain Boundary ◽  
Metal Oxides ◽  
Boundary Resistance ◽  
Total Electrical Conductivity ◽  
Perovskite Type

Effect of Impurity Silica on Grain Boundary Resistance of Yttrium-doped Barium Zirconate

2010 ◽  
Vol 29 (5-6) ◽  
pp. 339-346
Author(s):  
Susumu Imashuku, ◽  
Takaaki Tanaka, ◽  
Akiko Kuramitsu, ◽  
Yoshitaro Nose, ◽  
Tetsuya Uda,
Keyword(s):  
Grain Boundary ◽  
Boundary Resistance ◽  
Barium Zirconate

Connection between Fe grain boundary segregation in Al and phase formation in the bulk

2004 ◽  
Vol 95 (10) ◽  
pp. 953-955 ◽  
Author(s):  
Boris S. Bokstein ◽  
Alexey O. Rodin ◽  
Andrey N. Smirnov
Keyword(s):  
Grain Boundary ◽  
Phase Formation ◽  
Boundary Segregation ◽  
Grain Boundary Segregation
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