scholarly journals Room temperature structure and transport properties of the incommensurate modulated LaNb0.88W0.12O4.06

2019 ◽  
Vol 48 (5) ◽  
pp. 1633-1646 ◽  
Author(s):  
Cheng Li ◽  
Stevin S. Pramana ◽  
Stephen J. Skinner
Keyword(s):  
Ion Transport ◽  
Transport Properties ◽  
Room Temperature ◽  
Cation Ordering ◽  
Temperature Structure ◽  
Complex Structures ◽  
Ion Conducting ◽  
Oxide Ion

Cation ordering in the modulated La(Nb,W)O4+d phases has been demonstrated and the role of W in inducing occupancy modulation to this phase discussed. This is linked with the oxide ion transport, highlighting that modulated complex structures are viable candidates for ion conducting applications.

The role of hydrogen bonds in order-disorder transition of a new incommensurate low temperature phase β-[Zn-(C7H4NO4)2]·3H2O

2018 ◽  
Vol 233 (1) ◽  
pp. 17-25 ◽  
Author(s):  
Masoumeh Tabatabaee ◽  
Morgane Poupon ◽  
Václav Eigner ◽  
Přemysl Vaněk ◽  
Michal Dušek
Keyword(s):  
Low Temperature ◽  
Hydrogen Bonds ◽  
Dicarboxylic Acid ◽  
Room Temperature ◽  
Temperature Phase ◽  
Temperature Structure ◽  
Modulated Structure ◽  
Q Vector ◽  
Low Temperature Phase

AbstractThe room temperature structure withP21/csymmetry of the zinc(II) complex of pyridine-2,6-dicarboxylic acid was published by Okabe and Oya (N. Okabe, N. Oya, Copper(II) and zinc(II) complexes of pyridine-2,6-dicarboxylic acid.Acta Crystallogr. C.2000,56, 305). Here we report crystal structure of the low temperature phaseβ-[Zn(pydcH)2]·3H2O, pydc=C7H3NO4, resulting from the phase transition around 200K. The diffraction pattern of the low temperature phase revealed satellite reflections, which could be indexed with q-vector 0.4051(10)b* corresponding to (3+1)Dincommensurately modulated structure. The modulated structure was solved in the superspace groupX21/c(0b0)s0, whereXstands for a non-standard centring vector (½, 0, 0, ½), and compared with the room temperature phase. It is shown that hydrogen bonds are the main driving force of modulation.

Oxide Ion Transport in Donor-Doped Pb(ZrxTi1−x)O3: The Role of Grain Boundaries

2011 ◽  
Vol 94 (4) ◽  
pp. 1173-1181 ◽  
Author(s):  
Till Frömling ◽  
Arno Schintlmeister ◽  
Herbert Hutter ◽  
Jürgen Fleig
Keyword(s):  
Ion Transport ◽  
Grain Boundaries ◽  
Oxide Ion

Biomorphic structural batteries for robotics

2020 ◽  
Vol 5 (45) ◽  
pp. eaba1912 ◽  
Author(s):  
Mingqiang Wang ◽  
Drew Vecchio ◽  
Chunyan Wang ◽  
Ahmet Emre ◽  
Xiongye Xiao ◽  
...  
Keyword(s):  
Graph Theory ◽  
Energy Storage ◽  
Ion Transport ◽  
Transport Properties ◽  
Network Architecture ◽  
Degrees Of Freedom ◽  
Distributed Energy Storage ◽  
Robotic Devices ◽  
Ion Conducting ◽  
Total Capacity

Batteries with conformal shape and multiple functionalities could provide new degrees of freedom in the design of robotic devices. For example, the ability to provide both load bearing and energy storage can increase the payload and extend the operational range for robots. However, realizing these kinds of structural power devices requires the development of materials with suitable mechanical and ion transport properties. Here, we report biomimetic aramid nanofibers–based composites with cartilage-like nanoscale morphology that display an unusual combination of mechanical and ion transport properties. Ion-conducting membranes from these aramid nanofiber composites enable pliable zinc-air batteries with cyclic performance exceeding 100 hours that can also serve as protective covers in various robots including soft and flexible miniaturized robots. The unique properties of the aramid ion conductors are attributed to the percolating network architecture of nanofibers with high connectivity and strong nanoscale filaments designed using a graph theory of composite architecture when the continuous aramid filaments are denoted as edges and intersections are denoted as nodes. The total capacity of these body-integrated structural batteries is 72 times greater compared with a stand-alone Li-ion battery with the same volume. These materials and their graph theory description enable a new generation of robotic devices, body prosthetics, and flexible and soft robotics with nature-inspired distributed energy storage.

Structural and ion transport properties of sodium ion conducting Na2MTeO6 (M= MgNi and MgZn) solid electrolytes

2020 ◽  
Vol 46 (1) ◽  
pp. 663-671 ◽  
Author(s):  
M. Dubey ◽  
A. Kumar ◽  
S. Murugavel ◽  
G. Vijaya Prakash ◽  
D. Amilan Jose ◽  
...  
Keyword(s):  
Ion Transport ◽  
Transport Properties ◽  
Solid Electrolytes ◽  
Sodium Ion ◽  
Ion Conducting
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