Surface area, particle size? What other possible factors reduces/increases Electrode Polarization? And how does Electrode Polarization affect affect rate-capability and battery performance?
A lot of factors... Some of them are : electrolyte viscosity, access to the active material (electronic percolation or not), charge/discharge rate, presence (or in situ formation) of an insulating layer over the material, electrolyte loss (consume to form SEI or sometime solvent evaporation in coin-cell), etc..!
A lot of factors... Some of them are : electrolyte viscosity, access to the active material (electronic percolation or not), charge/discharge rate, presence (or in situ formation) of an insulating layer over the material, electrolyte loss (consume to form SEI or sometime solvent evaporation in coin-cell), etc..!
Surfeca area, particle size, particle morphology, kind and content of binder, active material-binder-carbon composite ratio. Also charge and diascharge current rates are important on it. All of these factors affect polarization. Low polarization as about 0.1-0.2 V is a acceptable. Researchers make studies to providing low polarization (acceptable) at high current rates and/or long time. So polarization is directly about battery capacity performance. And as a function of charge-discharge current rate, thats about cycle life too. All of these factors have an important role on diffusion of new ions to inner helmholtz plane from diffuse layer.
Activation of the electrode reactions, mass transport of species in the electrolyte and in the solid phase, and contact between the materials in the electrodes.
I believe the most important factor is the electrical property of the materials you are employing as anode or cathode. This factor define the number of available charge (electrons or ions) participating in redox reaction. Other important parameter is the Gibbs energy of reaction between Li and electrode materials,
Ralph Nicolai Nasara,
the answer is almost twice as many books. See one of them :
Nanotechnology for Lithium-Ion Batteries Editors: Abu-Lebdeh, Yaser, Davidson, Isobel (Eds.) [http://www.springer.com/us/book/9781461446040]
Part-chapter of Salem, Nuha (et al.): Effect of Nanoparticles on Electrolytes and Electrode/Electrolyte Interface.
and then follow-percolate into the references.
Hello everyone! Thank you for your informative response.
So for two materials for comparison, given the same testing conditions. They only vary by the active material employed for the Anode material (for my case)
So it could be (1) access to the active material (higher surface area, smaller particle size)
The materials I am trying to compare have a noticeable difference in electrochemical window: 200 mv and 340mv
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