Dry vs Wet Separator Technology

ZIMT battery separator

A look at dry vs wet separator technology and a look at the next developments in the roadmap. Author: Paul Wen from ZIMT The separator is a porous membrane placed between electrodes of opposite polarity, permeable to ionic flow but preventing electric contact of the electrodes. The dry vs wet differentiation is essentially the difference … Read more

Knee Point

Battery Capacity versus number of cycles showing the Knee Point

Attia et al [1] also describe six mechanisms/pathways that can produce the “Knee Point”: The impact of this nonlinear degradation in cell capacity depends to some extent on the architecture and application, but includes: This post has been built based on the support and sponsorship from: Eatron Technologies, About:Energy, AVANT Future Mobility, Quarto Technical Services, TAE Power Solutions and The Limiting Factor.  … Read more


Ande and cathode deifinition in chemistry

When a battery is discharging the electrons, e– , move from the – to + terminal and while it is charging the electrons travel from the + to the – terminal. These electrons are generated by the reduction and oxidation reactions (redox) inside the cell. Oxidation is loss (OIL) of electrons and Reduction is gain … Read more

NMC Composition


NMC Composition can be difficult to understand at first and so here is a walk through the compositions and what they actually mean. The 33%,33%,33%, in NMC111 is the composition of Ni, Mn, Co among themselves rather than the compound (Li Nix Mny Coz O2) as a whole.    I have calculated the % m/m of all elements … Read more

Cell Gas Pressure

Gases are generated in the cathode, anode and electrolyte during the formation and cycling of a battery cell. As this is a closed system the result is a cell gas pressure. What this gas is composed of, how it behaves and how it changes with State of Charge (SoC) and the cycling of the cell … Read more

Engineering Empty Space: Tailoring Battery Electrodes for Ion Transport

Author: Anton Resing The cathode layer in a lithium-ion battery is a composite of solid charge storing particles, a polymeric binder, and a conductive additive. Together, they are well dispersed in a solvent and spread like paint on a conductive substrate, an effective and pleasingly simple solution that works across various chemistries and cell designs. … Read more

10 things about SSBs that you are often not told

Author Dr. Simon Madgwick of Nuvvon Inc. As an overview, this post cannot cover every possibility or explain in depth. Nonetheless these 10 topics give a reasonable overview of solid-state batteries in terms of what is less transparent in the publicity and hype of solid state. To be clear, we need solid state batteries, but … Read more

Tesla 4680 Cathode Porosity

Indicative numbers for the Tesla 4680 cathode porosity, estimated based on 2D images of the Batch 1 and 2 cells originally analysed for The Limiting Factor by the Laboratory for Energy Storage and Conversion, UC San Diego. This image analysis and estimation was performed by Addionics based on the original Tesla 4680 cell benchmarking. Analysis … Read more