Phase transition, lithium ion conductivity and structural stability of tin substituted lithium garnets

RSC Advances ◽  
2016 ◽  
Vol 6 (97) ◽  
pp. 94706-94716 ◽  
Author(s):  
C. Deviannapoorani ◽  
S. Ramakumar ◽  
Mir Mehraj Ud Din ◽  
Ramaswamy Murugan
Keyword(s):  
Phase Transition ◽  
Benzoic Acid ◽  
Structural Stability ◽  
Lithium Ion ◽  
Cubic Phase ◽  
Distilled Water ◽  
Humid Condition ◽  
Cubic Structure ◽  
Lithium Ion Conductivity ◽  
Lithium Garnets

The high Li+ conductive cubic phase (Ia3̄d) Li6.5La3Sn1.5Ta0.5O12 immersed with the solution of benzoic acid and ethanol, distilled water and exposed to humid condition for 2 weeks preserved its high conductive cubic structure (Ia3̄d).

scholarly journals Assessing the importance of cation size in the tetragonal-cubic phase transition in lithium garnet electrolytes.

2021 ◽  
Author(s):  
Mark Stockham ◽  
Alice Griffiths ◽  
Bo Dong ◽  
Peter Slater
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Cell Volume ◽  
Tetragonal Phase ◽  
Variable Temperature ◽  
Lithium Ion ◽  
Cubic Phase ◽  
Formula Unit ◽  
Electrochemical Window ◽  
Lithium Garnets

Lithium garnets are promising solid-state electrolytes for next generation lithium-ion batteries. These materials have high ionic conductivity, a wide electrochemical window and stability with Li metal. However, lithium garnets have a maximum limit of 7 lithium atoms per formula unit (e.g. La3Zr2Li7O12), before the system transitions from a cubic to a tetragonal phase with poor ionic mobility. This arises from full occupation of the Li sites. Hence, the most conductive lithium garnets have Li between 6-6.55 Li per formula unit, which maintains the cubic symmetry and the disordered Li sub-lattice. The tetragonal phase, however, forms the highly conducting cubic phase at higher temperatures, thought to arise from increased cell volume and entropic stabilisation permitting Li disorder. However, little work has been undertaken in understanding the controlling factors of this phase transition, which could enable enhanced dopant strategies to maintain room temperature cubic garnet at higher Li contents. Here, a series of nine tetragonal garnets were synthesised and analysed via variable temperature XRD to understand the dependence of site substitution on the phase transition temperature. Interestingly the octahedral site cation radius was identified as the key parameter for the transition temperature with larger or smaller dopants altering the transition temperature noticeably. A site substitution was, however, found to make little difference irrespective of significant changes to cell volume.

Structure and lithium ion conductivity of bismuth containing lithium garnets Li5La3Bi2O12 and Li6SrLa2Bi2O12

2007 ◽  
Vol 143 (1-3) ◽  
pp. 14-20 ◽  
Author(s):  
Ramaswamy Murugan ◽  
Werner Weppner ◽  
Peter Schmid-Beurmann ◽  
Venkataraman Thangadurai
Keyword(s):  
Lithium Ion ◽  
Ion Conductivity ◽  
Lithium Ion Conductivity ◽  
Lithium Garnets

Investigation on lithium ion conductivity and structural stability of yttrium-substituted Li7La3Zr2O12

Ionics ◽  
2016 ◽  
Vol 22 (8) ◽  
pp. 1281-1289 ◽  
Author(s):  
C. Deviannapoorani ◽  
Lakshmi S. Shankar ◽  
S. Ramakumar ◽  
Ramaswamy Murugan
Keyword(s):  
Structural Stability ◽  
Lithium Ion ◽  
Ion Conductivity ◽  
Lithium Ion Conductivity

Facile synthesis of high lithium ion conductive cubic phase lithium garnets for electrochemical energy storage devices

RSC Advances ◽  
2015 ◽  
Vol 5 (116) ◽  
pp. 96042-96051 ◽  
Author(s):  
L. Dhivya ◽  
K. Karthik ◽  
S. Ramakumar ◽  
Ramaswamy Murugan
Keyword(s):  
Lithium Ion ◽  
Combustion Method ◽  
Electrochemical Energy Storage ◽  
Cubic Phase ◽  
Particle Sizes ◽  
Facile Synthesis ◽  
Energy Storage Devices ◽  
Rapid Synthesis ◽  
Storage Devices ◽  
Lithium Garnets

A facile combustion method was developed for the rapid synthesis of high conductive cubic phase Al-LLZ solid electrolyte with uniform particle sizes at the nanometer level for the fabrication of rechargeable all-solid-state Li and Li-air batteries.

Self-Improving Anode for Lithium-Ion Batteries Based on Amorphous to Cubic Phase Transition in TiO2 Nanotubes

2012 ◽  
Vol 116 (4) ◽  
pp. 3181-3187 ◽  
Author(s):  
Hui Xiong ◽  
Handan Yildirim ◽  
Elena V. Shevchenko ◽  
Vitali B. Prakapenka ◽  
Bonil Koo ◽  
...  
Keyword(s):  
Phase Transition ◽  
Lithium Ion Batteries ◽  
Tio2 Nanotubes ◽  
Lithium Ion ◽  
Cubic Phase

Cyclopentadithiophene-benzoic acid copolymers as conductive binders for silicon nanoparticles in anode electrodes of lithium ion batteries

2017 ◽  
Vol 53 (11) ◽  
pp. 1856-1859 ◽  
Author(s):  
Kuo-Lung Wang ◽  
Tzu-Husan Kuo ◽  
Chun-Feng Yao ◽  
Shu-Wei Chang ◽  
Yu-Shuo Yang ◽  
...  
Keyword(s):  
Benzoic Acid ◽  
Lithium Ion Batteries ◽  
Silicon Nanoparticles ◽  
Lithium Ion ◽  
Direct Arylation ◽  
Anode Electrode

Cyclopentadithiophene-benzoic acid copolymers have been synthesized by direct arylation followed by saponification for use as conductive binders for silicon nanoparticles in anode electrode of lithium ion batteries.

Lithium ion conductivity of oriented Li0.33La0.56TiO3 solid electrolyte films prepared by a sol–gel process

2016 ◽  
Vol 284 ◽  
pp. 1-6 ◽  
Author(s):  
Takashi Teranishi ◽  
Yuki Ishii ◽  
Hidetaka Hayashi ◽  
Akira Kishimoto
Keyword(s):  
Solid Electrolyte ◽  
Sol Gel ◽  
Lithium Ion ◽  
Ion Conductivity ◽  
Sol Gel Process ◽  
Lithium Ion Conductivity

scholarly journals Correction to: Lithium ion conductivity of solid solutions based on Li8ZrO6

2018 ◽  
Vol 22 (9) ◽  
pp. 2965-2965
Author(s):  
Mariya S. Shchelkanova ◽  
Georgi Sh. Shekhtman ◽  
Anastasia V. Kalashnova ◽  
Olga G. Reznitskikh
Keyword(s):  
Solid Solutions ◽  
Lithium Ion ◽  
Ion Conductivity ◽  
Lithium Ion Conductivity
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