Sodium-ion batteries are a type of rechargeable battery that stores and releases energy by moving sodium ions between the anode and cathode. This type of battery benefits from the abundance and relative low cost of sodium, making it considered as one of the sustainable energy storage solutions for the future.

Sodium-ion batteries have become a hot research topic in the field of battery technology in recent years, mainly due to their significant advantages in terms of cost, resource availability, and environmental friendliness. Below, I will introduce the advantages of sodium-ion batteries from several main aspects.


Firstly, sodium resources are abundant. Sodium is one of the most abundant metallic elements on Earth, especially in seawater, which contains a large amount of sodium. This makes the raw material cost of sodium-ion batteries relatively low, which is conducive to reducing the overall cost of the battery. In contrast, lithium resources are unevenly distributed and have higher mining costs.


Secondly, they are environmentally friendly. The environmental impact of sodium-ion batteries during production and recycling is relatively small. Due to the abundance of sodium in nature, the damage and pollution to the environment caused by sodium-ion batteries are smaller, which is more in line with the current demands for green energy and sustainable development.


Furthermore, they offer high safety. Sodium-ion batteries have good stability within the working temperature range and are less likely to experience overheating or combustion accidents, which is very important for the application range and lifespan of batteries.


In addition, sodium-ion batteries also have the characteristic of a long cycle life. With continuous optimization of electrode materials and electrolytes, the cycle stability and lifespan of sodium-ion batteries have been significantly improved to meet the demands of long-term use.


For example, a research team from the Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, has developed a new type of sodium-ion battery that uses unique hard carbon as an anode material. Compared with traditional lithium-ion batteries, this sodium-ion battery has significantly reduced costs, and also performs excellently in terms of cycle stability and energy density. In a cycling test of several thousand charge-discharge cycles, the capacity decay of the battery was very small, showing good long-term stability. This research not only demonstrates the cost and performance advantages of sodium-ion batteries but also provides important technical support for the commercial application of sodium-ion batteries.


Overall, with the advantages of low cost, abundant resources, environmental friendliness, and high safety, sodium-ion batteries have become a new type of energy storage device with broad application prospects. With the advancement of technology and the acceleration of industrialization, it is expected that sodium-ion batteries will play a greater role in the fields of electric vehicles, energy storage systems, and portable electronic devices in the future.
May 29, 2024 — Jarred Wong