Aliovalent-substitution defect chemistry, crystalline-glassy phase separation and ionic conductivity in fresnoite Ba2TiSi2O8-based materials

2015 ◽  
Vol 278 ◽  
pp. 157-165 ◽  
Author(s):  
Quanchao Wang ◽  
Shuaibo Liu ◽  
Xiaoming Wang ◽  
Hui Fu ◽  
Jungu Xu ◽  
...  
Keyword(s):  
Phase Separation ◽  
Ionic Conductivity ◽  
Glassy Phase ◽  
Defect Chemistry ◽  
Substitution Defect ◽  
Aliovalent Substitution

Multi-variable Bayesian optimization for a new composition with high Na+ conductivity in the Na3PS4 family

2022 ◽  
Author(s):  
Jung Yong Seo ◽  
Sunggeun Shim ◽  
Jin-Woong Lee ◽  
Byung Do Lee ◽  
Sangwon Park ◽  
...  
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Room Temperature ◽  
High Ionic Conductivity ◽  
Bayesian Optimization ◽  
Solid State Electrolyte ◽  
Aliovalent Substitution

Na3PS4 is an archetypal room-temperature (RT), Na+-conducting, solid-state electrolyte. Various compositional modifications of this compound via iso/aliovalent substitution are known to provide a high ionic conductivity (ion) that is comparable...

The Microstructure of National Bureau of Standards Reference Fly Ashes

1988 ◽  
Vol 136 ◽  
Author(s):  
J. C. Qian ◽  
E. E. Lachowski ◽  
F. P. Glasser
Keyword(s):  
Electron Microscopy ◽  
Phase Separation ◽  
Fly Ash ◽  
Glassy Phase ◽  
Analytical Electron Microscopy ◽  
Standard Reference Materials ◽  
Chemical Compositions ◽  
National Bureau ◽  
Fly Ashes ◽  
High Iron Content

ABSTRACTA suite of three fly ashes, National Bureau of Standards* Standard Reference Materials (SRMs) 2689, 2690 and 2691, was studied by transmission electron microscopy and by analytical electron microscopy (aem): sample preparation techniques are described. The chemical compositions of the glassy phase, analyzed by aem, showed a wide dispersion of values although the mean composition of the glass remained close to that of the whole fly ash.The microstructure of these materials is complex: besides crystalline inclusions, the aluminasilica glasses have undergone phase separation on a nanometer scale, and consist of two glassy phases. Since liquid-liquid phase separation has also been found in British fly ashes, it appears to be a characteristic feature of the glassy phase in Class F ashes and is also encountered in occasional Al-Si rich particles in Class C ashes. High iron content glass was found in fly ash SRM 2689, and its phase separation and crystallization were investigated.

A new 3-D open-framework Li-rich vanadoborate and its high ionic conductivity after transforming into glasses

2017 ◽  
Vol 46 (8) ◽  
pp. 2479-2484 ◽  
Author(s):  
Xinxin Liu ◽  
Dan Zhang ◽  
He Li ◽  
Lingyun Li ◽  
Hongming Yuan
Keyword(s):  
Ionic Conductivity ◽  
Glassy Phase ◽  
High Ionic Conductivity ◽  
Open Framework

A Li-rich vanadoborate was transformed into its glassy phase at 220 °C, which then exhibits high ionic conductivity.

scholarly journals Structural lithium ion battery electrolytesviareaction induced phase-separation

2017 ◽  
Vol 5 (48) ◽  
pp. 25652-25659 ◽  
Author(s):  
N. Ihrner ◽  
W. Johannisson ◽  
F. Sieland ◽  
D. Zenkert ◽  
M. Johansson
Keyword(s):  
Phase Separation ◽  
Ionic Conductivity ◽  
Lithium Ion Battery ◽  
Lithium Ion ◽  
High Ionic Conductivity ◽  
Structural Battery

Novel structural battery electrolytes with both high ionic conductivity and stiffness in combination.

Microporous Chitosan-Succinonitrile Membrane for Lithium Rechargeable Batteries

2016 ◽  
Vol 1133 ◽  
pp. 8-12 ◽  
Author(s):  
Nur Umira Taib ◽  
Nurul Hayati Idris
Keyword(s):  
Electron Microscope ◽  
Phase Separation ◽  
Electrochemical Impedance Spectroscopy ◽  
Ionic Conductivity ◽  
Impedance Spectroscopy ◽  
Scanning Electron Microscope ◽  
Electrochemical Impedance ◽  
Rechargeable Batteries ◽  
Lithium Rechargeable Batteries ◽  
Scanning Electron

In this work, microporous chitosan-succinonitrile membranes were prepared by phase separation method. The membranes were characterized using electrochemical impedance spectroscopy and scanning electron microscope. It was found that the addition of succinonitrile increased the pore size, which in turn increased the ionic conductivity of the chitosan-succinonitrile membrane.

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