Lithium Ion Diffusion Mechanism in Lithium Lanthanum Titanate Solid-State Electrolytes from Atomistic Simulations

2014 ◽  
Vol 98 (2) ◽  
pp. 534-542 ◽  
Author(s):  
Chao-hsu Chen ◽  
Jincheng Du
Keyword(s):  
Solid State ◽  
Diffusion Mechanism ◽  
Lithium Ion ◽  
Atomistic Simulations ◽  
Ion Diffusion ◽  
Lithium Lanthanum Titanate ◽  
Lanthanum Titanate ◽  
Solid State Electrolytes ◽  
Lithium Ion Diffusion

Lithium ion diffusion mechanism in covalent organic framework based solid state electrolyte

2019 ◽  
Vol 21 (19) ◽  
pp. 9883-9888 ◽  
Author(s):  
Kecheng Zhang ◽  
Bingkai Zhang ◽  
Mouyi Weng ◽  
Jiaxin Zheng ◽  
Shunning Li ◽  
...  
Keyword(s):  
Solid State ◽  
Diffusion Mechanism ◽  
Lithium Ion ◽  
One Dimension ◽  
Ion Diffusion ◽  
Solid State Electrolyte ◽  
Covalent Organic Framework ◽  
System P ◽  
Lithium Ion Diffusion ◽  
Organic Framework

Mechanism of Li-ions diffusion in a one-dimension tunnel of COF-5 and structure of the COF-5@LiClO4@THF system.

scholarly journals Effects of Mg Doping at Different Positions in Li-Rich Mn-Based Cathode Material on Electrochemical Performance

Nanomaterials ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 156
Author(s):  
Elena Makhonina ◽  
Lidia Pechen ◽  
Anna Medvedeva ◽  
Yury Politov ◽  
Aleksander Rumyantsev ◽  
...  
Keyword(s):  
Solid State ◽  
Electrochemical Performance ◽  
Solid State Reaction ◽  
Lithium Ion ◽  
Layered Oxides ◽  
Ion Diffusion ◽  
Capacity Fading ◽  
Mg Doping ◽  
Voltage Decay ◽  
Lithium Ion Diffusion

Li-rich Mn-based layered oxides are among the most promising cathode materials for next-generation lithium-ion batteries, yet they suffer from capacity fading and voltage decay during cycling. The electrochemical performance of the material can be improved by doping with Mg. However, the effect of Mg doping at different positions (lithium or transition metals) remains unclear. Li1.2Mn0.54Ni0.13Co0.13O2 (LR) was synthesized by coprecipitation followed by a solid-state reaction. The coprecipitation stage was used to introduce Mg in TM layers (sample LR-Mg), and the solid-state reaction (st) was used to dope Mg in Li layers (LR-Mg(st)). The presence of magnesium at different positions was confirmed by XRD, XPS, and electrochemical studies. The investigations have shown that the introduction of Mg in TM layers is preferable in terms of the electrochemical performance. The sample doped with Mg at the TM positions shows better cyclability and higher discharge capacity than the undoped sample. The poor electrochemical properties of the sample doped with Mg at Li positions are due to the kinetic hindrance of oxidation of the manganese-containing species formed after activation of the Li2MnO3 component of the composite oxide. The oxide LR-Mg(st) demonstrates the lowest lithium-ion diffusion coefficient and the greatest polarization resistance compared to LR and LR-Mg.

Solid State Reaction Synthesis and Characterization of Lithium Lanthanum Titanate Lithium-Ion Conducting Solid Electrolyte with Different Li to La Content

2019 ◽  
Vol 821 ◽  
pp. 389-394
Author(s):  
Andrew Dono ◽  
Rinlee Butch Cervera
Keyword(s):  
Solid State ◽  
Solid Electrolyte ◽  
Solid State Reaction ◽  
Room Temperature ◽  
Lithium Ion ◽  
Reaction Synthesis ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Lithium Lanthanum Titanate ◽  
Lanthanum Titanate

Lithium Lanthanum Titanate, Li3xLa(2/3)-x□(1/3)-2xTiO3, with three different compositions of (i) x = 0.097 (Li0.29La0.57TiO3), (ii) x = 0.117 (Li0.35La0.55TiO3), and (iii) x = 0.167 (Li0.50La0.50TiO3) were prepared via solid state reaction synthesis sintered at 1150 °C for 36 hours. X-ray diffraction (XRD) analysis revealed that all samples can be indexed to a cubic perovskite structure with lattice parameter a of about 3.86 Å. Morphological analysis using SEM showed that the samples are relatively dense and the calculated relative density of the LLTO samples range from about 94% to as high as 99% with increasing trend as Li content increases. Room temperature conductivity and its temperature dependence up to 120 °C were investigated. LLTO sample with x =0.117 revealed the highest total ionic conductivity at room temperature of about 1.69 x 10-03 S/cm which can be a promising solid electrolyte for an all-solid-state lithium-ion batteries.

New Insights into the Lithium-Ion Diffusion Mechanism in Vanadate Compounds

2021 ◽  
pp. 886-892
Author(s):  
Yinsheng Xu ◽  
Zhengnan Wang ◽  
Zhigao Yang ◽  
Jongbeom Na ◽  
Alowasheeir Azhar ◽  
...  
Keyword(s):  
Diffusion Mechanism ◽  
Lithium Ion ◽  
Ion Diffusion ◽  
Lithium Ion Diffusion
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