Intercalation and payment card: what they have in common

1. Step 1. Intercalation — is used in — Solid-state battery. Lithium ions insert themselves into the electrodes.
2. Step 2. Solid-state battery — is made of — Electrolyte. The electrolyte is solid (ceramic or polymer).
3. Step 3. Electrolyte — is material for — Alkaline battery. The electrolyte is potassium hydroxide.
4. Step 4. Alkaline battery — is part of — Electronic calculator. A calculator runs on a battery, sometimes on a tiny solar panel.
5. Step 5. Electronic calculator — has part — Integrated circuit. A chip.
6. Step 6. Integrated circuit — is part of — Payment card. An EMV chip.

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