Positive electrode

Example

Use in Lemonergy

Connect each material with its function.

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Learn it in Lesson 1 · Cell anatomy →

Connected concepts

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Aluminium foil

The positive current collector, typically 10–15 µm thick. A thin passive film keeps it stable at the high potential of the positive electrode, where copper would corrode.

Cathode

The electrode where reduction happens: the positive electrode on discharge, the negative one on charge. In industry usage, “cathode” means the positive electrode and its material, whatever the cell is doing.

Cathode active material

The lithium-containing compound in the positive electrode — NMC, NCA, LFP or LCO powder — that supplies the cell’s cyclable lithium. It is the most expensive material in most cells and sets the nominal voltage and much of the energy density.

Negative electrode

The electrode at the lower potential, usually graphite on copper foil in a lithium-ion cell. It holds the lithium when the cell is charged and releases it on discharge, and industry calls it the anode.

References & further reading

Further reading on this topic

These sources provide broader context; they are not presented as citations for every statement in this entry.

1. DOE Explains… Batteries

   U.S. Department of Energy

   Topic background · Introductory account of electrodes, electrolyte and conversion between chemical and electrical energy.

2. Current and future lithium-ion battery manufacturing

   Yangtao Liu, Ruihan Zhang, Jun Wang, Yan Wang · iScience · 2021

   Topic background · Electrode preparation, cell assembly, formation and manufacturing trade-offs.