scholarly journals Investigation of Lithium Ion Diffusion of Graphite Anode by the Galvanostatic Intermittent Titration Technique

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4683 ◽  
Author(s):  
Jong Hyun Park ◽  
Hana Yoon ◽  
Younghyun Cho ◽  
Chung-Yul Yoo
Keyword(s):  
Diffusion Coefficient ◽  
Lithium Ion ◽  
Open Circuit ◽  
Quasi Equilibrium ◽  
Ion Diffusion ◽  
Galvanostatic Intermittent Titration Technique ◽  
Graphite Anodes ◽  
Ion Intercalation ◽  
Lithium Ion Diffusion ◽  
Titration Technique

Graphite is used as a state-of-the-art anode in commercial lithium-ion batteries (LIBs) due to its highly reversible lithium-ion storage capability and low electrode potential. However, graphite anodes exhibit sluggish diffusion kinetics for lithium-ion intercalation/deintercalation, thus limiting the rate capability of commercial LIBs. In order to determine the lithium-ion diffusion coefficient of commercial graphite anodes, we employed a galvanostatic intermittent titration technique (GITT) to quantify the quasi-equilibrium open circuit potential and diffusion coefficient as a function of lithium-ion concentration and potential for a commercial graphite electrode. Three plateaus are observed in the quasi-equilibrium open circuit potential curves, which are indicative of a mixed phase upon lithium-ion intercalation/deintercalation. The obtained diffusion coefficients tend to increase with increasing lithium concentration and exhibit an insignificant difference between charge and discharge conditions. This study reveals that the diffusion coefficient of graphite obtained with the GITT (1 × 10−11 cm2/s to 4 × 10−10 cm2/s) is in reasonable agreement with literature values obtained from electrochemical impedance spectroscopy. The GITT is comparatively simple and direct and therefore enables systematic measurements of ion intercalation/deintercalation diffusion coefficients for secondary ion battery materials.

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

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 Operando Calorimetry Informs the Origin of Rapid Rate Performance in Microwave-Prepared TiNb2O7 Electrodes

2020 ◽  
Author(s):  
Sun Woong Baek ◽  
Kira E. Wyckoff ◽  
Danielle M. Butts ◽  
Jadon Bienz ◽  
AMPOL LIKITCHATCHAWANKUN ◽  
...  
Keyword(s):  
Synthesis Method ◽  
Lithium Ion ◽  
Enthalpy Of Mixing ◽  
High Rate ◽  
Rapid Rate ◽  
Rate Performance ◽  
Ion Diffusion ◽  
Phase Compound ◽  
Graphite Anodes ◽  
Lithium Ion Diffusion

<div>The shear-phase compound TiNb<sub>2</sub>O<sub>7</sub> has recently emerged as a safe and high-volumetric density replacement for graphite anodes in lithium ion batteries. An appealing feature of TiNb<sub>2</sub>O<sub>7</sub> is that it retains capacity even at high cycling rates. Here we demonstrate that phase pure and crystalline TiNb<sub>2</sub>O<sub>7</sub> can be rapidly prepared using a high-temperature microwave synthesis method. Studies of the charging and discharging of this material, including through operando calorimetry, permit key thermodynamic parameters to be revealed. The nature of heat generation is dominated by Joule heating, which sensitively changes as the conductivity of the electrode increases with increasing lithiation. The enthalpy of mixing, obtained from operando calorimetry, is found to be small across the different degrees of lithiation pointing to the high rate of lithium ion diffusion at the origin of rapid rate performance.</div>

scholarly journals Operando Calorimetry Informs the Origin of Rapid Rate Performance in Microwave-Prepared TiNb2O7 Electrodes

2020 ◽  
Author(s):  
Sun Woong Baek ◽  
Kira E. Wyckoff ◽  
Danielle M. Butts ◽  
Jadon Bienz ◽  
AMPOL LIKITCHATCHAWANKUN ◽  
...  
Keyword(s):  
Synthesis Method ◽  
Lithium Ion ◽  
Enthalpy Of Mixing ◽  
High Rate ◽  
Rapid Rate ◽  
Rate Performance ◽  
Ion Diffusion ◽  
Phase Compound ◽  
Graphite Anodes ◽  
Lithium Ion Diffusion

<div>The shear-phase compound TiNb<sub>2</sub>O<sub>7</sub> has recently emerged as a safe and high-volumetric density replacement for graphite anodes in lithium ion batteries. An appealing feature of TiNb<sub>2</sub>O<sub>7</sub> is that it retains capacity even at high cycling rates. Here we demonstrate that phase pure and crystalline TiNb<sub>2</sub>O<sub>7</sub> can be rapidly prepared using a high-temperature microwave synthesis method. Studies of the charging and discharging of this material, including through operando calorimetry, permit key thermodynamic parameters to be revealed. The nature of heat generation is dominated by Joule heating, which sensitively changes as the conductivity of the electrode increases with increasing lithiation. The enthalpy of mixing, obtained from operando calorimetry, is found to be small across the different degrees of lithiation pointing to the high rate of lithium ion diffusion at the origin of rapid rate performance.</div>

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

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
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