Sodium-ion batteries, particularly those in the 18650 format, are a type of rechargeable battery that utilizes sodium ions for energy storage and discharge. Here's a description in English:

18650 Sodium-Ion Battery Cells:

- Design and Dimensions: The 18650 designation refers to the size of the battery, which is 18mm in diameter and 65mm in length. These cells are cylindrical and are commonly used in a variety of applications due to their standard size.

- Chemistry and Composition: Unlike lithium-ion batteries, sodium-ion batteries use sodium as the charge carrier. They typically consist of an anode, a cathode, and an electrolyte. The anode is usually made of carbon-based materials that can intercalate sodium ions, while the cathode may contain materials like layered oxides.

- Energy Storage Capacity: 18650 sodium-ion cells offer a considerable energy storage capacity, making them suitable for high-drain devices and applications where a balance between energy density