Influence of Maximum Lithium Ion Concentration in Composition-Gradient Electrodes on Diffusion-Induced Stresses and Electrochemical Performances

2015 ◽  
Vol 162 (9) ◽  
pp. A1873-A1878 ◽  
Author(s):  
Kai Zhang ◽  
Yong Li ◽  
Bailin Zheng
Keyword(s):  
Lithium Ion ◽  
Ion Concentration ◽  
Composition Gradient ◽  
Electrochemical Performances ◽  
Induced Stresses

Effect of Irreversible Electrochemical Reaction on Diffusion and Diffusion-Induced Stresses in Spherical Composition–Gradient Electrodes

2019 ◽  
Vol 75 (1) ◽  
pp. 55-63
Author(s):  
Kai Zhang ◽  
Bailin Zheng
Keyword(s):  
Electrochemical Reaction ◽  
Composition Gradient ◽  
Electrochemical Performances ◽  
Transition Form ◽  
Capacity Fading ◽  
Induced Stresses ◽  
The Difference ◽  
And Diffusion ◽  
Positive Effect ◽  
Heterogeneous Factor

AbstractComposition–gradient electrodes have been proved to have excellent electrochemical performances. The effect of irreversible electrochemical reaction on diffusion and diffusion-induced stresses in such electrodes is investigated. The diffusion equation and mechanical equation considering the electrochemical reaction and the heterogeneous factors are derived, and the distributions of lithium (Li) concentration and stresses in a spherical electrode are obtained under potentiostatic charging. The results indicate that the electrochemical reaction will slow down the diffusion process and enhance the stresses of the electrode. However, the heterogeneous factors of the electrochemical reaction could provide a positive effect on the stresses, which means that the heterogeneous factor is conducive to avoid capacity fading of the battery. The results suggest that the composition–gradient electrodes could be designed to have a decreasing transition form of forward reaction rate and an increasing transition form of the difference of atomic volume between reactants and the reaction product.

Effects of carbon black on the electrochemical performances of SiO anode for lithium-ion capacitors

2021 ◽  
Vol 499 ◽  
pp. 229936
Author(s):  
Xianzhong Sun ◽  
Linbin Geng ◽  
Sha Yi ◽  
Chen Li ◽  
Yabin An ◽  
...  
Keyword(s):  
Carbon Black ◽  
Lithium Ion ◽  
Electrochemical Performances
Sign in / Sign up

Export Citation Format

Share Document