An aqueous sodium-ion battery is a secondary battery that uses water as an electrolyte. Its working principle is similar to that of a lithium-ion battery, except that lithium ions are replaced by sodium ions. Because the sodium element is rich, cheap, non-toxic, and the aqueous electrolyte has the advantages of high safety, environmental friendliness, and easy handling, the aqueous sodium ion battery is considered to be a storage device with broad development prospects.Energy Technology。

The main components of aqueous sodium ion battery include cathode material, anode material, separator and aqueous electrolyte. At present, the commonly used cathode materials are layered oxides (such as Na0.44MnO2), Prussian blue compounds (such as Na2Fe[Fe(CN)6]) and polyanionic compounds (such as Na3V2(PO4)3), etc.. Commonly used anode materials are hard carbon (such as biomass hard carbon), metal sodium or alloy (such as Na-Snalloy) etc. The diaphragm is generally made of polypropylene or polyethylene materials such as microporous membrane. Aqueous electrolytes are mainly composed of water and sodium salts (such as Na2SO4、NaClO4etc.) composition。

In recent years, with the increasing global demand for clean energy and low-carbon economy, energy storage technology has become an important research area. Water-based sodium-ion batteries have attracted more and more attention and investment due to their low cost, high safety and environmental friendliness. According to data from the Champ Consulting Group,2022The size of the global aqueous sodium ion battery market in252.4Millions of dollars, expected2029Year reached1728.9Millions of dollars,2023-2029CAGR during the period (CAGR)31.6%。

China is a major producer and consumer of water-based sodium-ion batteries, with a number of leading technologies and companies. Among them, Zhongke HaiNa is the first company in the world to achieve mass production of aqueous sodium ion batteries, and its products have been applied in energy storage, electric vehicles and other fields. Benan Energy is the earliest enterprise engaged in the R & D and production of water-based sodium salt batteries in China. Its products are mainly used in special vehicles, communication base stations and other fields. Polyfluoro New Energy is one of the largest manufacturers of aqueous sodium ion batteries in China, and its products are mainly used in energy storage, two-wheeled electric vehicles and other fields. In addition, there are a number of enterprises such as Chuanyi Technology, Star Sodium Power, Penghui Energy, Tiangeng shares, etc. are also actively laying out the research and development and production of water-based sodium ion batteries.

Although water-based sodium-ion batteries need to be improved in terms of energy density, they are superior to lithium-ion batteries in terms of safety and low-temperature performance, so they have greater market potential in energy storage, two-wheeled electric vehicles, special vehicles and other fields. In the energy storage market, due to the country's increasing requirements for energy storage safety, the types of batteries that are prone to thermal runaway, such as ternary lithium batteries and sodium-sulfur batteries, are restricted, while aqueous sodium-ion batteries have higher Security and stability, so it is expected to become the new favorite of the energy storage market. In the two-wheeled electric vehicle market, because the two-wheeled vehicle has relatively low requirements for cruising range, and relatively high requirements for cost and safety, water-based sodium ion batteries also have a greater competitive advantage. In the special vehicle market, because special vehicles need to work in extreme environments, such as low temperature, high humidity, high altitude, etc., and aqueous sodium ion batteries have better low temperature adaptability and moisture resistance, so they are also suitable for special vehicles. Power source.

Shangpu Consulting believes that in the future, water-based sodium ion batteries need to further strengthen technological innovation and standard-setting to promote the industrialization process and application promotion. In terms of technological innovation, it is necessary to focus on solving the energy density, cycle life, and rate performance of aqueous sodium ion batteries to improve their applicability and competitiveness in various fields. In terms of standard formulation, it is necessary to establish a complete standard system for aqueous sodium ion batteries, including standards at all levels such as materials, components, and systems, and regulate the production, transportation, use, and recycling of aqueous sodium ion batteries to ensure water sodium ion batteries. Quality and safety.