Anisotropic Li+ ion conductivity in a large single crystal of a Co(iii) coordination complex

2017 ◽  
Vol 4 (1) ◽  
pp. 79-83 ◽  
Author(s):  
Saet Byeol Kim ◽  
Jeung Yoon Kim ◽  
Nak Cheon Jeong ◽  
Kang Min Ok
Keyword(s):  
Ion Channels ◽  
Single Crystal ◽  
Ion Conductivity ◽  
Coordination Complex ◽  
Large Single Crystal ◽  
Li Ion

Anisotropic Li+ ion conductivity has been observed in a large single crystal of a novel Co(iii) coordination complex attributable to the presence of directional ion channels with a suitable size.

scholarly journals Li3Co1.06(1)TeO6: synthesis, single-crystal structure and physical properties of a new tellurate compound with CoII/CoIII mixed valence and orthogonally oriented Li-ion channels

2017 ◽  
Vol 46 (37) ◽  
pp. 12663-12674 ◽  
Author(s):  
Gunter Heymann ◽  
Elisabeth Selb ◽  
Michaela Kogler ◽  
Thomas Götsch ◽  
Eva-Maria Köck ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Ion Channels ◽  
Physical Properties ◽  
Single Crystal ◽  
Mixed Valence ◽  
Single Crystal Structure ◽  
Li Ion

Independent and interpenetrating Li/O and (Co,Te)/O substructures without a honeycomb-like ordering of CoO6 and TeO6 octahedra were observed in Li3Co1.06(1)TeO6.

scholarly journals Upscaling of LATP synthesis: Stoichiometric screening of phase purity and microstructure to ionic conductivity maps

Ionics ◽  
2021 ◽  
Vol 27 (5) ◽  
pp. 2017-2025
Author(s):  
Nikolas Schiffmann ◽  
Ethel C. Bucharsky ◽  
Karl G. Schell ◽  
Charlotte A. Fritsch ◽  
Michael Knapp ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Sol Gel ◽  
Ion Conductivity ◽  
Process Window ◽  
Lithium Aluminum ◽  
Potential Candidate ◽  
Secondary Phases ◽  
X Ray Diffraction ◽  
Battery Cell ◽  
Li Ion

AbstractLithium aluminum titanium phosphate (LATP) is known to have a high Li-ion conductivity and is therefore a potential candidate as a solid electrolyte. Via sol-gel route, it is already possible to prepare the material at laboratory scale in high purity and with a maximum Li-ion conductivity in the order of 1·10−3 s/cm at room temperature. However, for potential use in a commercial, battery-cell upscaling of the synthesis is required. As a first step towards this goal, we investigated whether the sol-gel route is tolerant against possible deviations in the concentration of the precursors. In order to establish a possible process window for sintering, the temperature interval from 800 °C to 1100 °C and holding times of 10 to 480 min were evaluated. The resulting phase compositions and crystal structures were examined by X-ray diffraction. Impedance spectroscopy was performed to determine the electrical properties. The microstructure of sintered pellets was analyzed by scanning electron microscopy and correlated to both density and ionic conductivity. It is shown that the initial concentration of the precursors strongly influences the formation of secondary phases like AlPO4 and LiTiOPO4, which in turn have an influence on ionic conductivity, densification behavior, and microstructure evolution.

scholarly journals Li2(BH4)(NH2) Nanoconfined in SBA-15 as Solid-State Electrolyte for Lithium Batteries

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 946
Author(s):  
Qianyi Yang ◽  
Fuqiang Lu ◽  
Yulin Liu ◽  
Yijie Zhang ◽  
Xiujuan Wang ◽  
...  
Keyword(s):  
Solid State ◽  
High Performance ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Transference Number ◽  
Electrochemical Stability ◽  
Ion Conductivity ◽  
Solid State Batteries ◽  
Li Ion ◽  
Conduction Properties

Solid electrolytes with high Li-ion conductivity and electrochemical stability are very important for developing high-performance all-solid-state batteries. In this work, Li2(BH4)(NH2) is nanoconfined in the mesoporous silica molecule sieve (SBA-15) using a melting–infiltration approach. This electrolyte exhibits excellent Li-ion conduction properties, achieving a Li-ion conductivity of 5.0 × 10−3 S cm−1 at 55 °C, an electrochemical stability window of 0 to 3.2 V and a Li-ion transference number of 0.97. In addition, this electrolyte can enable the stable cycling of Li|Li2(BH4)(NH2)@SBA-15|TiS2 cells, which exhibit a reversible specific capacity of 150 mAh g−1 with a Coulombic efficiency of 96% after 55 cycles.

Relevance between the Bulk Density and Li+-Ion Conductivity in a Porous Electrolyte: The Case of Li[Li1/3Ti5/3]O4

2015 ◽  
Vol 7 (36) ◽  
pp. 20314-20321 ◽  
Author(s):  
Kazuhiko Mukai ◽  
Naoyoshi Nunotani ◽  
Ryuta Moriyasu
Keyword(s):  
Bulk Density ◽  
Ion Conductivity ◽  
Li Ion

The role of Li site occupancy on the Li-ion conductivity of Ta-doped Li6.75La3Zr1.75Ta0.25O12 solid electrolyte materials with high Li concentrations

2021 ◽  
Vol 369 ◽  
pp. 115713
Author(s):  
Xingxing Zhang ◽  
Cheng Li ◽  
Weili Liu ◽  
Tae-Sik Oh ◽  
Jeffrey W. Fergus
Keyword(s):  
Solid Electrolyte ◽  
Site Occupancy ◽  
Ion Conductivity ◽  
Li Ion
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