Solid-state transformation of aqueous to organic electrolyte – Enhancing the operating voltage window of ‘in situ electrolyte’ supercapacitors

2020 ◽  
Vol 4 (5) ◽  
pp. 2438-2447
Author(s):  
Desirée Leistenschneider ◽  
Lars Henning Heß ◽  
Andrea Balducci ◽  
Lars Borchardt

Waste products during carbon synthesis are transformed into organic electrolytes for supercapacitor applications.

MRS Advances ◽  
2020 ◽  
Vol 5 (29-30) ◽  
pp. 1529-1535 ◽  
Author(s):  
Rijie Zhao ◽  
Jianrong Gao ◽  
Yang Ren

AbstractMelting, solidification and solid-state transformation of the intermetallic Ni3Sn compound were investigated in situ using synchrotron high-energy X-ray diffraction. It was observed that the compound undergoes a hexagonal to cubic transition before melting. In solidification, a disordered cubic phase crystallizes from the liquid at a large undercooling but it is reordered prior to bulk solidification. In melting and solidification, forced or natural flows are active bringing about significant changes of crystal orientations. These in situ observations provided insights into phase transformations of Ni3Sn at elevated temperatures and their roles in formation of metastable microstructure consisting of coarse grains and subgrains.


2018 ◽  
Vol 19 (2) ◽  
pp. 1086-1094 ◽  
Author(s):  
Zhonghui Gao ◽  
Ying Zhao ◽  
Haifeng Wang ◽  
Yun Wang ◽  
Lixue Jiang ◽  
...  

MRS Bulletin ◽  
2008 ◽  
Vol 33 (6) ◽  
pp. 621-629 ◽  
Author(s):  
D. Juul Jensen ◽  
S.E. Offerman ◽  
J. Sietsma

AbstractThree-dimensional x-ray diffraction (3DXRD) allows nondestructive characterization of grains, orientations, and stresses in bulk microstructures and, therefore, enables in situ studies of the structural dynamics during processing. The method is described briefly, and its potential for providing new data valuable for validation of various models of microstructural evolution is discussed. Examples of 3DXRD measurements related to recrystallization and to solid-state phase transformations in metals are described. 3DXRD measurements have led to new modeling activity predicting the evolution of metallic microstructures with much more detail than hitherto possible. Among these modeling activities are three-dimensional (3D) geometric modeling, 3D molecular dynamics modeling, 3D phase-field modeling, two-dimensional (2D) cellular automata, and 2D Monte Carlo simulations.


2009 ◽  
Vol 38 (11) ◽  
pp. 1080-1081 ◽  
Author(s):  
Hironori Saito ◽  
Mitsuaki Suzuki ◽  
Hiroshi Miyamae ◽  
Naoto Hayashi ◽  
Keiji Kobayashi

2015 ◽  
Vol 120 (3) ◽  
pp. 570-587 ◽  
Author(s):  
Steven J. Jaret ◽  
William R. Woerner ◽  
Brian L. Phillips ◽  
Lars Ehm ◽  
Hanna Nekvasil ◽  
...  

1990 ◽  
Vol 205 ◽  
Author(s):  
Gillian E. Winters ◽  
K.M. Unruh ◽  
C.P. Swann ◽  
M.E. Patt ◽  
B.E. White ◽  
...  

AbstractMultilayer films, consisting of alternating layers of crystalline Ni and Ti, have been prepared by RF sputter deposition over a range of modulation wavelengths corresponding to an overall composition of Ni50Ti50. These films have been characterized by xray diffraction and Rutherford backscattering measurements. The solid-state transformation by interdiffusional mixing of the individual layers has been directly studied by differential scanning calorimetry and correlated with structural measurements. These measurements indicate that the solid-state reaction of Ni and Ti multilayers proceeds through the formation of a metastable solid solution of Ti in Ni followed by the formation of intermetallic equilibrium compounds. No direct calorimetric or structural evidence for the formation of an amorphous Ni-Ti phase has been found in these samples.


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