Intercalation and heat pump: what they have in common

1. Step 1. Intercalation — is used in — Lithium-ion battery. Lithium ions reversibly enter the lattice of the graphite and the cathode.
2. Step 2. Lithium-ion battery — evolved from — Lead–acid battery. The lithium-ion battery is the next generation of rechargeable chemical current sources, with higher specific energy.
3. Step 3. Lead–acid battery — is part of — Uninterruptible power supply. A battery.
4. Step 4. Uninterruptible power supply — is part of — Data centre. Backup power.
5. Step 5. Data centre — has part — Air conditioner. Cooling.
6. Step 6. Air conditioner — uses — Heat pump. An air conditioner is a heat pump that carries heat out of the room.

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