An electrode is the electrical part of a cell and consists of a backing metallic sheet with active material printed on the surface. In a battery cell we have two electrodes:

  1. Anode – the negative or reducing electrode that releases electrons to the external circuit and oxidizes during and electrochemical reaction.
  2. Cathode – the positive electrode, at which electrochemical reduction takes place. As current flows, electrons from the circuit and cations from the electrolytic solution in the device move towards the cathode.

Anode-Cathode – in chemistry, we define Cathode as the electrode where reduction takes place and Anode the electrode where oxidation occurs. Both, during the discharge and recharge electrons move from the Anode to the Cathode. {Anode and Cathode swap places}.

Electrode Dimensions

A key aspect of any cell format or detailed design is the estimation of the electrode lengths.

3D Electrodes

Another way to increase energy density is with 3D electrodes. Increasing the surface area and connection to the active materials can improve a number of features of the cell.
3D Electrodes - Addionics