In batteries, conductive additives minimize particle-to-particle and particle-to-collector resistance, improving current distribution. Without them, cells would have a poor power performance and cell life.
But what do we mean by “particle-to-particle” and “particle-to-collector” resistance?
To understand particle-to-particle resistance, imagine a line of people passing a ball to each other. If they’re standing close together, the ball moves quickly. If they’re far apart or wearing thick gloves, it takes longer.
In a battery, the “people” are tiny particles of active material, and the “ball” is electricity.
Particle-to-particle resistance is how hard it is for electricity to move from one particle to the next. Conductive additives act like better gloves or shorter gaps—they make the handoff easier.
Now for particle-to-collector resistance: Imagine the last person in the line passing the ball to a big basket. If the basket is smooth and easy to reach, the ball drops in quickly. If the ball is rough or far away, it’s harder.
In a battery, the “basket” is the current collector (the metal layer that gathers electricity).
Particle-to-collector resistance is how hard it is for electricity to move from the particles into that collector.
Conductive additives help make this connection smooth and efficient. Lower resistance means electricity flows more evenly, improving power and battery life.
