Novel Low Temperature Molten Salt Synthesis of a Li5La3Nb2O12 Solid State Electrolyte and Its Properties

2014 ◽  
Vol 1679 ◽  
Author(s):  
Shiang Teng ◽  
Wei Wang ◽  
Ashutosh Tiwari
Keyword(s):  
Solid State ◽  
Low Temperature ◽  
Molten Salt ◽  
Synthesis Method ◽  
Molten Salt Synthesis ◽  
X Ray Diffraction ◽  
Solid State Electrolyte ◽  
Li Ion ◽  
Quality Material ◽  
Li Content

ABSTRACTThe solid state electrolyte (SSE) of Li5La3Nb2O12 (LLNO) was synthesized via a novel molten salt synthesis (MSS) method at the relatively low temperature of 900°C. The low sintering temperature prevented the loss of lithium that commonly occurs during synthesis of the SSE using conventional solid state or wet chemical reactions. Recent publications have demonstrated that preserving the Li content is critical in improving the ionic conductivity of SSEs. The LLNO in this experiment showed a high Li-ion conductivity which is comparable to other values reported for LLNO. X-ray diffraction (XRD) measurements confirmed the formation of the cubic garnet Ia-3d crystal structure. In addition, the morphology was examined by scanning electron microscopy (SEM), which showed a uniform grain size and crack-free microstructure. These results demonstrate that MSS is a powerful synthesis method to fabricate LLNO at a relatively low temperature while still achieving a high quality material.

scholarly journals Synthesis of LiFePO4 in an Open-air Environment

MRS Advances ◽  
2017 ◽  
Vol 2 (17) ◽  
pp. 939-944
Author(s):  
Fei Gu ◽  
Kichang Jung ◽  
Taehoon Lim ◽  
Alfredo A. Martinez-Morales
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Synthesis Method ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Rechargeable Batteries ◽  
X Ray Diffraction ◽  
The Family ◽  
Li Ion ◽  
The Cost

ABSTRACTAmong different efforts to increase the competitiveness of lithium-ion batteries (LIBs) in the energy storage marketplace, reducing the cost of production is a major effort by the LIB industry. This work proposes a synthesis method to decrease the production cost for LiFePO4, by synthesizing the material through an open-air environment solid state reaction.The lithium (Li)-ion battery is a member of the family of rechargeable batteries. In our approach, iron phosphate (FePO4) powder is preheated to eliminate moisture. Once dried, the FePO4 is mixed with lithium acetate (CH3COOLi), and the mixture is heated in a tube furnace. The solid-state reaction is conducted in an open-air environment. In order to minimize the oxidation of the formed LiFePO4, a modified tube reaction vessel is utilized during synthesis. X-ray Diffraction (XRD) and Energy Dispersive Spectroscopy (EDS) are used to characterize the crystal structure and chemical composition of the synthesized material. Furthermore, scanning electron microscopy (SEM) characterization shows the grain size of the formed LiFePO4 to be in the range of 200 nm to 600 nm. Cycling testing of fabricated battery cells using the synthesized LiFePO4 is done using an Arbin Tester.

Facile preparation of Ag2V4O11 nanoparticles via low-temperature molten salt synthesis method

2008 ◽  
Vol 44 (8) ◽  
pp. 886-889 ◽  
Author(s):  
Xiaoyu Cao ◽  
Lingling Xie ◽  
Hui Zhan ◽  
Yunhong Zhou
Keyword(s):  
Low Temperature ◽  
Molten Salt ◽  
Synthesis Method ◽  
Molten Salt Synthesis ◽  
Facile Preparation

Influences of Progressing Parameters on Flake BaBi4Ti4O15 Powder Synthesized by Molten Salt Synthesis Method

2011 ◽  
Vol 335-336 ◽  
pp. 704-707 ◽  
Author(s):  
Jin Liang Huang ◽  
Li Hua Li ◽  
Yong Jun Gu ◽  
Qian Li
Keyword(s):  
Molten Salt ◽  
Average Particle Size ◽  
Synthesis Method ◽  
Molten Salt Synthesis ◽  
Average Particle ◽  
Reaction Products ◽  
X Ray Diffraction ◽  
Chloride Flux ◽  
X Ray ◽  
Sulfate Flux

Abstract. BaBi4Ti4O15 powder was synthesized by molten salt synthesis (MSS) method in NaCl-KCl and Na2SO4-K2SO4 fluxes. The phases of reaction products and the microstructures at different calcined temperatures were detected by X-ray diffraction (XRD) and scanning electron microscope (SEM). As a result, the flaky BaBi4Ti4O15 powder with anisotropy was synthesized by molten salt synthesis method in NaCl-KCl and Na2SO4-K2SO4 fluxes in the range of 850～1050°C. Compared with BaBi4Ti4O15 powder synthesized in the sulfate flux, the anisotropy level of BaBi4Ti4O15 powder which was synthesized in chloride flux increased, the average particle size(APS) of BaBi4Ti4O15 powder synthesized in the chloride flux is slight larger than in the sulfate flux. The thickness of BaBi4Ti4O15 powder was synthesized by molten salt synthesis method in the chloride flux decreased than in the sulfate.

Low-Temperature Ionothermal Synthesis of Li-Ion Conductive Li4B7O12Cl Solid-State Electrolyte

2019 ◽  
Vol 2 (7) ◽  
pp. 5140-5145 ◽  
Author(s):  
Deming Tan ◽  
Faxing Wang ◽  
Tobias Pietsch ◽  
Matthias A. Grasser ◽  
Thomas Doert ◽  
...  
Keyword(s):  
Solid State ◽  
Low Temperature ◽  
Solid State Electrolyte ◽  
Ionothermal Synthesis ◽  
Li Ion

SYNTHESIS OF ANISOTROPIC LEAD TITANATE POWDERS FOR TEMPLATED GRAIN GROWTH OF TEXTURED PIEZOELECTRIC CERAMICS

2010 ◽  
Vol 17 (02) ◽  
pp. 159-164 ◽  
Author(s):  
S. MA ◽  
J. Y. H. FUH ◽  
Y. F. ZHANG ◽  
L. LU
Keyword(s):  
Molten Salt ◽  
Heating Temperature ◽  
Synthesis Method ◽  
Processing Parameters ◽  
Molten Salt Synthesis ◽  
X Ray Diffraction ◽  
Thermal Synthesis ◽  
Flux Synthesis ◽  
One Step ◽  
Molten Salt System

Needle-shaped PbTiO3 (PT) template particles were successfully synthesized using two different types of approaches, molten salt synthesis (MSS) and thermal synthesis method. In eutectic NaCl–KCl molten salt system, homogeneous and nonagglomerated needle-shaped PT particles were produced from PbO and needle-like TiO2 compound heated at 800–850°C for 2 h. The effect of heating temperature on the morphology of formed powders was studied in order to identify the optimum processing parameters. The template formation mechanism is discussed. Using thermal synthesis method, comparable needle-shaped PT crystalline particles were also obtained in one step. Plate-shaped PT powders were derived via flux synthesis. The effect of additives such as MnCl2 and LiF on the morphology of derived PT was studied. Adding a certain amount of MnCl2 led to the formation of well-defined plate-shaped PT particles. The structure and morphology of synthesized powders were characterized by means of X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM).

scholarly journals Enhanced Densification and Conduction Properties of Li5+xLa3Nb2-xZrxO12 Garnet Solid-State Electrolytes Through Zn Doping on the Nb/Zr Site

2020 ◽  
Author(s):  
Bo Dong ◽  
Linhao Li ◽  
Xiao Tao ◽  
Mark P. Stockham ◽  
Chuan Li ◽  
...  
Keyword(s):  
Solid State ◽  
Li Ion Batteries ◽  
Solid State Electrolyte ◽  
Zn Doping ◽  
Solid State Battery ◽  
Electrolyte Membranes ◽  
Li Ion ◽  
Solid State Electrolytes ◽  
Li Content ◽  
Conduction Properties

<p>While garnet Li ion conductors are attracting considerable interest as potential solid state electrolytes for Li ion batteries, a key challenge is to improve the conductivity, which is associated with the Li content in the structure, and to overcome the challenges of sintering dense electrolyte membranes. In this work we show that Zn doping on the 16a octahedral Nb site leads to substantially improved sintering in both Li<sub>5</sub>La<sub>3</sub>Nb<sub>2</sub>O<sub>12</sub> and Li<sub>6</sub>La<sub>3</sub>ZrNbO<sub>12</sub>. As a result of the enhanced sintering, and the associated increase in Li content, the conductivities in both garnet systems were significantly enhanced on Zn doping, up to 2.1 x 10<sup>-4</sup> Scm<sup>-1</sup> at 25 <sup>o</sup>C for Li<sub>6.6</sub>La<sub>3</sub>ZrNb<sub>0.8</sub>Zn<sub>0.2</sub>O<sub>12</sub>. This doping strategy therefore represents a promising approach to improve the relative density and, hence, ionic conductivity of garnet solid state electrolyte materials for possible solid-state battery applications. </p>

scholarly journals Enhanced Densification and Conduction Properties of Li5+xLa3Nb2-xZrxO12 Garnet Solid-State Electrolytes Through Zn Doping on the Nb/Zr Site

2020 ◽  
Author(s):  
Bo Dong ◽  
Linhao Li ◽  
Xiao Tao ◽  
Mark P. Stockham ◽  
Chuan Li ◽  
...  
Keyword(s):  
Solid State ◽  
Li Ion Batteries ◽  
Solid State Electrolyte ◽  
Zn Doping ◽  
Solid State Battery ◽  
Electrolyte Membranes ◽  
Li Ion ◽  
Solid State Electrolytes ◽  
Li Content ◽  
Conduction Properties

<p>While garnet Li ion conductors are attracting considerable interest as potential solid state electrolytes for Li ion batteries, a key challenge is to improve the conductivity, which is associated with the Li content in the structure, and to overcome the challenges of sintering dense electrolyte membranes. In this work we show that Zn doping on the 16a octahedral Nb site leads to substantially improved sintering in both Li<sub>5</sub>La<sub>3</sub>Nb<sub>2</sub>O<sub>12</sub> and Li<sub>6</sub>La<sub>3</sub>ZrNbO<sub>12</sub>. As a result of the enhanced sintering, and the associated increase in Li content, the conductivities in both garnet systems were significantly enhanced on Zn doping, up to 2.1 x 10<sup>-4</sup> Scm<sup>-1</sup> at 25 <sup>o</sup>C for Li<sub>6.6</sub>La<sub>3</sub>ZrNb<sub>0.8</sub>Zn<sub>0.2</sub>O<sub>12</sub>. This doping strategy therefore represents a promising approach to improve the relative density and, hence, ionic conductivity of garnet solid state electrolyte materials for possible solid-state battery applications. </p>

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