scholarly journals An Empirical Rate Constant Based Model to Study Capacity Fading in Lithium Ion Batteries

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Srivatsan Ramesh ◽  
K. Venkata Ratnam ◽  
Balaji Krishnamurthy
Keyword(s):  
Rate Constant ◽  
Film Formation ◽  
Solid Electrolyte Interphase ◽  
Lithium Ion ◽  
Capacity Fading ◽  
Formation Reaction ◽  
One Dimensional ◽  
Battery Systems ◽  
Diffusion And Kinetics ◽  
Kinetics Of

A one-dimensional model based on solvent diffusion and kinetics to study the formation of the SEI (solid electrolyte interphase) layer and its impact on the capacity of a lithium ion battery is developed. The model uses the earlier work on silicon oxidation but studies the kinetic limitations of the SEI growth process. The rate constant of the SEI formation reaction at the anode is seen to play a major role in film formation. The kinetics of the reactions for capacity fading for various battery systems are studied and the rate constants are evaluated. The model is used to fit the capacity fade in different battery systems.

scholarly journals Modelling the effect of anode particle radius and anode reaction rate constant on capacity fading of Li-ion batteries

2021 ◽  
Author(s):  
Vikalp Jha ◽  
Balaji Krishnamurthy
Keyword(s):  
Rate Constant ◽  
Reaction Rate ◽  
Solid Electrolyte Interphase ◽  
Lithium Ion ◽  
Potential Drop ◽  
Reaction Rate Constant ◽  
Particle Radius ◽  
Capacity Fading ◽  
Anode Reaction ◽  
Simulation Results

This paper investigates the effect of anode particle radius and anode reaction rate constant on the capacity fading of lithium-ion batteries. It is observed through simulation results that capacity fade will be lower when the anode particle size is smaller. Simulation results also show that the reaction rate constant for the anode reaction has a good impact on the capacity loss of a lithium-ion battery. The potential drop across the SEI layer (solid electrolyte interphase) is studied as a function of the anode particle radius and anode reaction rate constant. Modelling results are compared with experimental data and found to compare well.  

In operando measurements of kinetics of solid electrolyte interphase formation in lithium-ion batteries

2018 ◽  
Vol 400 ◽  
pp. 426-433 ◽  
Author(s):  
Tibebu Alemu ◽  
Sylvia Ayu Pradanawati ◽  
Shih-Chang Chang ◽  
Pin-Ling Lin ◽  
Yu-Lin Kuo ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
Lithium Ion Batteries ◽  
Solid Electrolyte Interphase ◽  
Lithium Ion ◽  
In Operando ◽  
Kinetics Of

Unconventional capacity increase kinetics of a chemically engineered SnO2 aerogel anode for long-term stable lithium-ion batteries

2020 ◽  
Vol 8 (17) ◽  
pp. 8244-8254 ◽  
Author(s):  
Sung Mi Jung ◽  
Dong Won Kim ◽  
Hyun Young Jung
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Capacity Fading ◽  
Capacity Increase ◽  
Kinetics Of

SnO2 aerogel anode delivers the highest reversible capacity of about 2031 mAh g−1 with a 200% capacity recovery and presents the superior cyclability over 10 000 cycles under high C-rates without evident capacity fading tendency.

Kinetics of rouleaux formation using TV image analyzer. II. Rat erythrocytes

1983 ◽  
Vol 245 (2) ◽  
pp. H259-H264 ◽  
Author(s):  
T. Shiga ◽  
K. Imaizumi ◽  
N. Maeda ◽  
K. Kon
Keyword(s):  
Kinetic Model ◽  
Rate Constant ◽  
Three Dimensional ◽  
Erythrocyte Aggregation ◽  
Image Analyzer ◽  
One Dimensional ◽  
Specific Pathogen ◽  
Time Courses ◽  
Kinetics Of ◽  
Rouleaux Formation

With the use of a rheoscope combined with a TV image analyzer, the kinetics of specific pathogen-free rat erythrocyte aggregation was studied. Under certain conditions (gamma 7.5 s-1, hematocrit 0.36%, in own plasma, at 25 degrees C) one-dimensional aggregates (rouleaux) were formed without the development of three-dimensional aggregates, perhaps because of very low concentration of gamma-globulin. The observed phenomena could be explained by 1) the erythrocyte sedimentation and 2) the rouleaux formation. The time courses, of the biphasic change in erythrocyte count and of the increments in total area and in the area/count, were successfully simulated by a kinetic model of linear polymerization, assuming a sedimentation rate constant and an association rate constant. Further, a Poissonlike distribution of the length of rouleaux was shown, as predicted theoretically on the basis of the same kinetic model.

Dissolution Kinetics of Spinel Lithium Manganate and its Relation to Capacity Fading in Lithium Ion Batteries

2002 ◽  
Vol 17 (6) ◽  
pp. 1476-1481 ◽  
Author(s):  
Chung-Hsin Lu ◽  
Shang-Wei Lin
Keyword(s):  
Elevated Temperatures ◽  
Lithium Ion ◽  
Dissolution Kinetics ◽  
Reaction Rate Constant ◽  
Dissolution Behavior ◽  
Capacity Fading ◽  
Dissolution Reaction ◽  
Lithium Manganate ◽  
Spinel Lithium Manganate ◽  
Kinetics Of

The dissolution behavior and kinetics of spinel lithium manganate LiMn2O4 with different particle sizes have been investigated in this study. The dissolution of manganese cations from LiMn2O4 is confirmed to occur when LiMn2O4 particles are immersed in the electrolytes. The amount of dissolved manganese ions markedly increases with a rise in temperature and a decrease in particle size, which implies that the capacity fading of LiMn2O4 at elevated temperatures is associated with manganese dissolution. On the basis of the isothermal analysis of reaction kinetics, the rate of manganese dissolution from LiMn2O4 is dominated by the rate of dissolution reaction. Smaller particles exhibit a larger reaction rate constant and higher activation energy of the dissolution process than the larger ones. Therefore, an increase in temperature has a more pronounced effect on the dissolution reaction of small particles than on that of large particles.

Kinetics of formation of sodium chlorozirconate

1967 ◽  
Vol 45 (20) ◽  
pp. 2317-2320 ◽  
Author(s):  
J. D. Dutrizac ◽  
S. N. Flengas
Keyword(s):  
Rate Constant ◽  
Parabolic Rate Constant ◽  
Zirconium Tetrachloride ◽  
Formation Reaction ◽  
Diffusion Controlled ◽  
Kinetics Of Formation ◽  
Torr Pressure ◽  
Arrhenius Rate Equation ◽  
Kinetics Of ◽  
Method Analysis

The kinetics of formation of sodium hexachlorozirconate from sodium chloride single crystals and zirconium tetrachloride vapor at about 600 Torr have been investigated by the weight-gain method. Analysis of the results showed the formation reaction to be diffusion controlled, with zirconium tetrachloride being the most probable diffusing species. The apparent energy of activation has been determined for this reaction from the variation of the rate constant with temperature, and it was found to be 12.3 ± 3 kcal/mole. The Arrhenius rate equation for the formation of Na2ZrCl6 from NaCl and ZrCl4 at 600 Torr pressure, in the temperature range 400 to 500 °C, is [Formula: see text]where the units of the parabolic rate constant, K, are (g(Na2ZrCl6))2 cm−4 h−1.

scholarly journals Formation of lithiated gold and its use for the preparation of reference electrodes — an EQCM study

2021 ◽  
Author(s):  
Christopher Behling ◽  
Karl J. J. Mayrhofer ◽  
Balázs B. Berkes
Keyword(s):  
Film Formation ◽  
Solid Electrolyte Interphase ◽  
Lithium Ion ◽  
Electrochemical Quartz Crystal Microbalance ◽  
Alloy Formation ◽  
Reference Electrodes ◽  
Additional Information ◽  
Metallic Lithium ◽  
Preparation Phase ◽  
One Year

AbstractLithiated gold wires can be used to build reference electrodes with outstanding potential stabilities over several days and even over the course of one year. These electrodes are well suited for investigations in the context of lithium-ion batteries (LIBs). In this work, a detailed procedure for the preparation of such electrodes with tailored mechanical properties, which can be fitted gastight into electrochemical cells using commercially available fittings, is given. The electrochemical lithiation process is studied using the electrochemical quartz crystal microbalance (EQCM) technique, and the differences in lithiation of wire type and thin film type gold electrodes are discussed. All experiments were carried out with two different electrolytes, namely, a LiPF6 and a lithium bis(trifluoromethane sulfonyl) imide (LiTFSI)-based electrolyte, and we conclude that for a higher lithiation rate and long-term stability, the use of LiTFSI-based electrolyte in the preparation phase is beneficial. The EQCM data provides a better insight in the analysis of film formation processes, like the buildup of the solid electrolyte interphase (SEI) during the lithiation, the rate of deposition of metallic lithium, or additional information on the kinetics of Li-Au alloy formation.

Structure and Formation Kinetics of Mosi2 Composites Formed by Reactive Vapor Infiltration Process

1994 ◽  
Vol 365 ◽  
Author(s):  
W.B. Hillig ◽  
R.M. Ramakrishnan ◽  
M. Broglio ◽  
N. Patibandla
Keyword(s):  
Rate Constant ◽  
Linear Increase ◽  
Growth Rate Constant ◽  
Matrix Composites ◽  
Infiltration Process ◽  
One Dimensional ◽  
Formation Kinetics ◽  
New Process ◽  
Kinetics Of ◽  
Vapor Infiltration

ABSTRACTReactive Vapor Infiltration is a convenient new process for producing high purity MoSi2 matrix composites by reacting compacted mixed Mo + MoSi2 powders ranging from 0 to 80 wt. % MoSi2 with H2 + SiCl4 vapors at temperatures from 1000 to 1400°C. Consideration must be taken of the volumetric increase that accompanies this conversion. The kinetics of the advance of the MoSi2 growth layer and the gravimetric uptake are given as a function of temperature and the composition. The parabolic growth rate constant was independent of composition at least up to 30% MoSi2 composition, but then showed a strong, linear increase with increasing MoSi2 content. There appeared to be a levelling off of rate above 70% MoSi2. The corresponding gravimetric rate constant was relatively insensitive to the starting MoSi2 content. This behavior is at variance with a simple one-dimensional diffusive growth model. Possible reasons for this variance are offered.

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