Currently, the main water - based adhesives include SBR (styrene - butadiene latex), CMC (carboxymethyl cellulose), PTFE (polytetrafluoroethylene emulsion), PAA (polyacrylate emulsion), and PUA (water - based polyurethane), etc. According to research, the overall demand for water - based adhesives was approximately 2,000 tons in 2017, and it is expected to reach a scale of 4,000 - 5,000 tons in 2020. The incremental demand will mainly come from the power battery field. At present, the high - end water - based adhesive market for power batteries has a highly concentrated situation, and it is almost mainly occupied by Japanese companies such as Zeon, JSR, and Sojitz. In China, a relatively well - known water - based adhesive brand is Chengdu Yindile Company. The price of high - end water - based adhesives reaches 300 - 400 yuan per kilogram, while that of low - end ones is only 20 - 30 yuan per kilogram, with a price difference of more than ten times.

The fundamental reasons for the gap between domestic water - based adhesives and those of Japanese companies are the late start and relatively weak basic R & D strength. At the same time, it is also related to the overall domestic industrial chain ecological environment. The domestic supporting raw materials and equipment need to be improved. The raw materials purchased in China need to be processed and purified before they can be used. However, the raw materials purchased by Japanese companies have a very high purity, which are difficult to procure in the domestic market.

The expanded application of water - based adhesives in positive and negative electrode materials is an inevitable trend for lithium - ion batteries to achieve high - quality, low - cost, and green - pollution - free production. With the large - scale production of lithium - ion batteries in China, as one of the important auxiliary materials, a large number of raw materials for water - based adhesives for lithium - ion batteries will gradually be localized, which will endow domestic enterprises with a natural advantage in meeting the customized needs of downstream battery enterprises (foreign enterprises usually respond slowly). Current research has fully demonstrated that it has a good effect in reducing the interfacial impedance between the electrode and the electrolyte and the internal resistance of the battery, as well as improving and enhancing the electrochemical performance. In the future, aspects such as the selection, modification, and performance improvement of water - based polymer adhesive materials with different structures and properties, the research on the action mechanism, and the application process methods of adhesives all need to be systematically and deeply studied. The market prospects of water - based adhesives for lithium - ion batteries are very promising.