Storage and Fuel Cells (OCR A-Level Chemistry A): Flashcards

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Storage and Fuel Cells
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Primary cells

Non-rechargeable, single-use cells

Secondary cells

Rechargeable cells

Fuel cells operation

Continuous operation with fuel and oxygen supply

Why lithium-ion cells have high energy density

Lithium is a light metal

Lithium-ion cell negative electrode

Graphite coated with lithium metal

Voltage of fully charged lithium-ion cell

4.2 V

Product of hydrogen fuel cells

Water only

Cell voltage of hydrogen fuel cells

1.23 V

Ion in alkali hydrogen fuel cell electrolyte

Hydroxide ions (OH−\text{OH}^-)

Ion in acid hydrogen fuel cell electrolyte

Hydrogen ions (H+\text{H}^+)

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