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 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 Anode Material

2001 ◽  
Vol 17 (05) ◽  
pp. 385-388 ◽  
Author(s):  
Tang Zhi-Yuan ◽  
◽  
Xue Jian-Jun ◽  
Liu Chun-Yan ◽  
Zhuang Xin-Guo
Keyword(s):  
Diffusion Coefficient ◽  
Anode Material ◽  
Lithium Ion ◽  
Graphite Anode ◽  
Ion Diffusion ◽  
Lithium Ion Diffusion

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 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

STRAIN INDUCED ENHANCED MIGRATION OF POLARON AND LITHIUM ION IN λ-MnO2

2012 ◽  
Vol 05 (04) ◽  
pp. 1250037 ◽  
Author(s):  
HUI-JUN YAN ◽  
ZHI-QIANG WANG ◽  
BO XU ◽  
CHUYING OUYANG
Keyword(s):  
Electrical Conductivity ◽  
Diffusion Coefficient ◽  
Dynamic Properties ◽  
Dynamic Performance ◽  
Compressive Strain ◽  
Lithium Ion ◽  
Ion Diffusion ◽  
Lithium Storage ◽  
Industrial Preparation ◽  
Lithium Ion Diffusion

The dynamic properties of λ- MnO2 under strain can be different to normal conditions as lithium storage material. Results from first-principles calculations show that compressive strain will enhance the electrical conductivity and lithium ion diffusion coefficient simultaneously. We show that 7% compressive strain applied along the (011) direction leads to about two orders of magnitude increase in both the electrical conductivity and Li diffusion coefficient under room temperature. 7% compressive strain applied along the (111) direction will increase the Li diffusion coefficient by five orders of magnitude. These results are important to experimental and industrial preparation and design of λ- MnO2 materials when interfaces are involved. The physical mechanism behind the strain induced improvement of the dynamic performance is discussed.

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