Which statement best describes Lithium Ion Batteries?

• A. They are non-rechargeable.
• B. They are rechargeable and use lithium ions moving between the anode and cathode.
• C. They use calcium as an electrode.
• D. They contain no lithium.

Answer: (B)

Lithium ion batteries are rechargeable energy storage devices in which lithium ions shuttle between the anode and cathode as the battery charges and discharges. When delivering power, lithium ions move from the anode into the electrolyte and toward the cathode, while electrons travel through the external circuit to provide current. Charging reverses this flow, pushing ions back to the anode. This ion movement and intercalation into electrode materials is what stores and releases energy. So, the defining statement is that they are rechargeable and use lithium ions moving between the anode and cathode. They are not non-rechargeable, they do contain lithium, and they do not use calcium as an electrode.