scholarly journals Effect of Grain Size on the Ionic Conductivity of a Block Copolymer Electrolyte

2014 ◽  
Vol 47 (15) ◽  
pp. 5424-5431 ◽  
Author(s):  
Mahati Chintapalli ◽  
X. Chelsea Chen ◽  
Jacob L. Thelen ◽  
Alexander A. Teran ◽  
Xin Wang ◽  
...  
Keyword(s):  
Grain Size ◽  
Block Copolymer ◽  
Ionic Conductivity ◽  
Copolymer Electrolyte

On the Origin of Slow Changes in Ionic Conductivity of Model Block Copolymer Electrolyte Membranes in Contact with Humid Air

2010 ◽  
Vol 43 (12) ◽  
pp. 5306-5314 ◽  
Author(s):  
Xin Wang ◽  
Sergey Yakovlev ◽  
Keith M. Beers ◽  
Moon J. Park ◽  
Scott A. Mullin ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Ionic Conductivity ◽  
Humid Air ◽  
Model Block ◽  
Electrolyte Membranes ◽  
Copolymer Electrolyte

Discontinuous Changes in Ionic Conductivity of a Block Copolymer Electrolyte through an Order–Disorder Transition

2012 ◽  
Vol 1 (2) ◽  
pp. 305-309 ◽  
Author(s):  
Alexander A. Teran ◽  
Scott A. Mullin ◽  
Daniel T. Hallinan ◽  
Nitash P. Balsara
Keyword(s):  
Block Copolymer ◽  
Ionic Conductivity ◽  
Disorder Transition ◽  
Copolymer Electrolyte

Sintering behavior and ionic conductivity of Li1.5Al0.5Ti1.5(PO4)3 synthesized with different precursors

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Bambar Davaasuren ◽  
Qianli Ma ◽  
Alexandra von der Heiden ◽  
Frank Tietz
Keyword(s):  
Grain Size ◽  
Solid State ◽  
Ionic Conductivity ◽  
Solid State Reaction ◽  
Sintering Temperature ◽  
Sintering Behavior ◽  
Homogeneous Microstructure ◽  
Micro Cracks ◽  
Primary Particles ◽  
Total Ionic Conductivity

Abstract Li1.5Al0.5Ti1.5(PO4)3 (LATP) powders were prepared from different NO x -free precursors using an aqueous-based solution-assisted solid-state reaction (SA-SSR). The sintering behavior, phase formation, microstructure and ionic conductivity of the powders were explored as a function of sintering temperature. The powders showed a relatively narrow temperature windows in which shrinkage occurred. Relative densities of 95% were reached upon heating between 900 and 960 °C. Depending on the morphological features of the primary particles, either homogeneous and intact microstructures with fine grains of about <2 µm in size or a broad grain size distribution, micro-cracks and grain cleavages were obtained, indicating the instability of the microstructure. Consequently, the ceramics with a homogeneous microstructure possessed a maximum total ionic conductivity of 0.67 mS cm−1, whereas other ceramics reached only 0.58 mS cm−1 and 0.21 mS cm−1.

Ionic conductivity in nanocrystalline Gd doped ceria

2008 ◽  
Vol 1122 ◽  
Author(s):  
Gianguido Baldinozzi ◽  
David Simeone ◽  
Dominique Gosset ◽  
Mickael Dollé ◽  
Georgette Petot-Ervas
Keyword(s):  
Grain Size ◽  
Ionic Conductivity ◽  
Sol Gel ◽  
Doped Ceria ◽  
Narrow Size Distribution ◽  
Conductivity Measurements ◽  
X Ray Diffraction ◽  
X Ray ◽  
Grain Sizes ◽  
The Impact

AbstractWe have synthesized Gd-doped ceria polycrystalline samples (5, 10, 15 %mol), having relative densities exceeding 95% and grain sizes between 30 and 160 nm after axial hot pressing (750 °C, 250 MPa). The samples were prepared by sintering nanopowders obtained by sol-gel chemistry methods having a very narrow size distribution centered at about 16 nm. SEM and X-ray diffraction were performed to characterize the sample microstructures and to assess their structures. We report ionic conductivity measurements using impedance spectroscopy. It is important to investigate the properties of these systems with sub-micrometric grains and as a function of their composition. Therefore, samples having micrometric and nanometric grain sizes (and different Gd content) were studied. Evidence of Gd segregation near the grain boundaries is given and the impact on the ionic conductivity, as a function of the grain size and Gd composition, is discussed and compared to microcrystalline samples.

scholarly journals Growth of Lithium Dendrites and Globules through a Solid Block Copolymer Electrolyte as a Function of Current Density

2018 ◽  
Vol 122 (47) ◽  
pp. 26797-26804 ◽  
Author(s):  
Jacqueline A. Maslyn ◽  
Whitney S. Loo ◽  
Kyle D. McEntush ◽  
Hee Jeung Oh ◽  
Katherine J. Harry ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Current Density ◽  
Lithium Dendrites ◽  
Solid Block ◽  
Copolymer Electrolyte

Consolidation and properties of Gd0.1Ce0.9O1.95 nanoparticles for solid-oxide fuel cell electrolytes

2006 ◽  
Vol 21 (1) ◽  
pp. 119-124 ◽  
Author(s):  
A.I.Y. Tok ◽  
L.H. Luo ◽  
F.Y.C. Boey ◽  
J.L. Woodhead
Keyword(s):  
Grain Size ◽  
Ionic Conductivity ◽  
Sintering Temperature ◽  
Spherical Shape ◽  
Impedance Analysis ◽  
Lattice Parameter ◽  
Narrow Particle Size Distribution ◽  
Precipitation Process ◽  
Boundary Area ◽  
Co Precipitation

Gd-doped ceria solid solutions have been recognized to be leading electrolytes for use in intermediate-temperature fuel cells. In this paper, the preparation, solubility, and densification of Gd0.1Ce0.9O1.95 ceramics derived from carbonate co-precipitation are reported. The dissolution of Gd2O3 in CeO2 lattice was identified to be completed during the co-precipitation process by studying the lattice parameter as a function of temperature. After calcination at 800 °C for 2 h, the nano-sized Gd0.1Ce0.9O1.95 powder (∼33 nm) with a nearly spherical shape and a narrow particle-size distribution was obtained. This calcined powder has high sinterability and maximum densification rate at ∼1000 °C. Sintering at 1300 °C for 4 h yielded over 97% relative density with near maximum. The grain size increased with increases in sintering temperature. The ionic conductivity of these pellets was tested by alternating current impedance spectroscopy to elucidate the contribution of intragranular and intergranular conductivity to the total ionic conductivity. It was found that sintering temperature does not affect intragranular conductivity, though intergranular conductivity was strongly influenced by grain size, grain boundary area, and relativity density. This pellet sintered at 1500 °C for 4 h showed a high ionic conductivity of 5.90 × 10−2 s/cm when measured at 750 °C. The characterization and structural evaluation of the as-received powders were carried out using x-ray diffraction, transmission electron microscopy, Brunauer–Emmett–Teller, and dilatometer and impedance analysis.

Control of Domain Orientation in Block Copolymer Electrolyte Membranes at the Interface with Humid Air

2009 ◽  
Vol 21 (2) ◽  
pp. 203-208 ◽  
Author(s):  
Moon Jeong Park ◽  
Suhan Kim ◽  
Andrew M. Minor ◽  
Alexander Hexemer ◽  
Nitash P. Balsara
Keyword(s):  
Block Copolymer ◽  
Humid Air ◽  
Domain Orientation ◽  
Electrolyte Membranes ◽  
Copolymer Electrolyte

Confinement Effects on Watery Domains in Hydrated Block Copolymer Electrolyte Membranes

2010 ◽  
Vol 43 (19) ◽  
pp. 8128-8135 ◽  
Author(s):  
Sung Yeon Kim ◽  
Moon Jeong Park ◽  
Nitash P. Balsara ◽  
Andrew Jackson
Keyword(s):  
Block Copolymer ◽  
Confinement Effects ◽  
Electrolyte Membranes ◽  
Copolymer Electrolyte
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