B. Lithium ions move from cathode to anode through the electrolyte.

Wed, 06 May 2026 04:53:56 +0000

Understanding the Movement of Lithium Ions from Cathode to Anode in Lithium-Ion Batteries Lithium-ion batteries power a vast array of modern devices, from smartphones and laptops to electric vehicles and renewable energy storage systems. At the heart of their operation is the precise movement of lithium ions across internal components—particularly from the cathode to the anode through the electrolyte. Understanding this ion transport mechanism is key to appreciating how lithium-ion batteries function efficiently and safely. ### The Basics of Lithium-Ion Battery Operation A lithium-ion battery operates through electrochemical reactions during charging and discharging. During discharge, lithium ions (Li⁺) release electrons from the cathode, move through the external circuit to power connected devices, and travel through the electrolyte to the anode. In contrast, charging reverses this flow, pushing lithium ions back toward the cathode via the electrolyte.