Explaining The Universe on Instagram: "Lithium-ion batteries are rechargeable power sources commonly used in devices like smartphones, laptops, and electric vehicles. They work by moving lithium ions back and forth between two electrodes—a graphite anode and a lithium metal oxide cathode—through an electrolyte. When the battery is charging, the ions move from the cathode to the anode, and when it’s discharging, they flow back to the cathode, generating an electric current. A thin separator keeps