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The impact of state of charge on transport in silicon anodes

Quantifying microstructure differences across Gr-SiOx anodes stopped at states of charge from 0 to 100%. Introduction Fast charging in graphite-silicon suboxide (Gr-SiOx) composite anodes depends on maintaining efficient ionic transport as the electrode evolves during lithiation. This is particularly challenging because the two active phases undergo different degrees of dimensional change. SiOx offers substantially higher … Read more

The Bruggeman Myth: Why Cell Parameterization Must Move Beyond the 1.5 Assumption

AION Engineering INC In battery continuum modelling, few parameters are as universally accepted—and as fundamentally flawed for modern cells—as a Bruggeman exponent of 1.5. While it is widely understood that tortuosity and porosity are distinct structural metrics, the industry consistently defaults to this idealized constant to bridge the gap between them. To understand why modern … Read more

Why Electrode Microstructure Architecture Determines Cell Performance

AION Engineering INC In lithium-ion batteries, electrode performance is governed not only by material chemistry but by the three-dimensional microstructure formed by particles, pores, binder, and conductive additives. Before production begins, this microstructure already defines how ions and electrons will move through the electrode. Once manufacturing starts, many of these structural characteristics can no longer … Read more