scholarly journals Effect of Calcination Time on Lithium Ion Diffusion Coefficient of LiMg0.04Mn1.96O4 Prepared by a Solid-State Combustion Method

2018 ◽  
pp. 1027-1041 ◽  
Author(s):  
Tao Feng ◽  
Keyword(s):  
Diffusion Coefficient ◽  
Solid State ◽  
Lithium Ion ◽  
Combustion Method ◽  
Ion Diffusion ◽  
Calcination Time ◽  
Lithium Ion Diffusion

Lithium Ion Diffusion Through Glassy Carbon Plate

1997 ◽  
Vol 496 ◽  
Author(s):  
M. Inaba ◽  
S. Nohmi ◽  
A. Funabiki ◽  
T. Abe ◽  
Z. Ogumi
Keyword(s):  
Diffusion Coefficient ◽  
Glassy Carbon ◽  
Lithium Ion ◽  
Ion Diffusion ◽  
Irreversible Capacity ◽  
Oxidation Current ◽  
Current Curve ◽  
Carbon Plate ◽  
Lithium Ion Diffusion

ABSTRACTThe electrochemical permeation method was applied to the determination of the diffusion coefficient of Li+ion (DLi+) in a glassy carbon (GC) plate. The cell was composed of two compartments, which were separated by the GC plate. Li+ions were inserted electrochemically from one face, and extracted from the other. The flux of the permeated Li+ions was monitored as an oxidation current at the latter face. The diffusion coefficient was determined by fitting the transient current curve with a theoretical one derived from Fick's law. When the potential was stepped between two potentials in the range of 0 to 0.5 V, transient curves were well fitted with the theoretical one, which gaveDLi+ values on the order of 10−8cm2s−1. In contrast, when the potential was stepped between two potentials across 0.5 V, significant deviation was observed. The deviation indicated the presence of trap sites as well as diffusion sites for Li+ions, the former of which is the origin of the irreversible capacity of GC.

scholarly journals Determination of the Lithium Ion Diffusion Coefficient in Graphite

1999 ◽  
Vol 146 (1) ◽  
pp. 8-14 ◽  
Author(s):  
Ping Yu ◽  
B. N. Popov ◽  
J. A. Ritter ◽  
R. E. White
Keyword(s):  
Diffusion Coefficient ◽  
Lithium Ion ◽  
Ion Diffusion ◽  
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 In situ studies of lithium-ion diffusion in a lithium-rich thin film cathode by scanning probe microscopy techniques

2015 ◽  
Vol 17 (34) ◽  
pp. 22235-22242 ◽  
Author(s):  
Shan Yang ◽  
Binggong Yan ◽  
Tao Li ◽  
Jing Zhu ◽  
Li Lu ◽  
...  
Keyword(s):  
Thin Film ◽  
Diffusion Coefficient ◽  
Scanning Probe Microscopy ◽  
Lithium Ion ◽  
Scanning Probe ◽  
Ion Diffusion ◽  
Microscopy Techniques ◽  
And Diffusion ◽  
Lithium Ion Diffusion

Band-excitation Electrochemical Strain Microscopy (BE-ESM) imaging and diffusion coefficient mapping of Li-rich cathode film.

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.

scholarly journals Effect of Ni2+ on Lithium-Ion Diffusion in Layered LiNi1−x−yMnxCoyO2 Materials

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 465
Author(s):  
Yuanyuan Zhu ◽  
Yang Huang ◽  
Rong Du ◽  
Ming Tang ◽  
Baotian Wang ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Lithium Ion ◽  
Ion Diffusion ◽  
Local Coordination ◽  
Excellent Electrochemical Performance ◽  
Layered Cathode Materials ◽  
Li Ion ◽  
Dynamics Simulations ◽  
And Diffusion ◽  
Lithium Ion Diffusion

LiNi1−x−yMnxCoyO2 materials are a typical class of layered cathode materials with excellent electrochemical performance in lithium-ion batteries. Molecular dynamics simulations are performed for LiNi1−x−yMnxCoyO2 materials with different transition metal ratios. The Li/Ni exchange ratio, ratio of anti-site Ni2+ to total Ni2+, and diffusion coefficient of Li ions in these materials are calculated. The results show that the Li-ion diffusion coefficient strongly depends on the ratio of anti-site Ni2+ to total Ni2+ because their variation tendencies are similar. In addition, the local coordination structure of the Li/Ni anti-site is analyzed.

scholarly journals Synthesis of Ni@NiSn Composite with High Lithium‐Ion Diffusion Coefficient for Fast‐Charging Lithium‐Ion Batteries

2019 ◽  
Vol 4 (3) ◽  
pp. 1900073 ◽  
Author(s):  
Hong Zhao ◽  
Junxin Chen ◽  
Weiwei Wei ◽  
Shanming Ke ◽  
Xierong Zeng ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Ion Diffusion ◽  
Fast Charging ◽  
Lithium Ion Diffusion
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