Solid-state batteries represent the next generation of power battery products due to their high energy density and reliable safety. Automakers and battery manufacturers in various countries are stepping up their research and development efforts to achieve commercial mass production as soon as possible. 

In addition to new energy vehicles, the demand for solid-state batteries in energy storage, ships, and eVTOL is also expected to promote the development of the market at the level of hundreds of GWh to TWh.

1 Technical challenges faced by solid-state batteries

Compared with lithium batteries, although solid-state batteries have obvious advantages, to achieve commercial mass production, progress needs to be made in both material systems and preparation processes to solve the shortcomings of existing technologies. 

In addition, the production process of solid-state batteries in film formation, electrode materials, and battery packaging is more complex than that of traditional liquid batteries, and customization and optimization of preparation processes are required to improve production efficiency and consistency and reduce costs. 

In the final analysis, the mass production of solid-state batteries requires the coordinated development of the entire industrial chain, including close cooperation in material supply, manufacturing processes, equipment development, and other links.

2 Domestic companies accelerate market layout as the market gradually heats up for solid-state batteries.

Domestic laser companies have also stepped up their market layout. Liyuanheng has technical solutions for producing equipment related to solid-state battery production lines and has experience in delivering single-machine and complete-line equipment. 

Thanks to the platform-based technology layout, the company has conducted in-depth research and accumulation in the core processes of solid-state batteries, such as the key point of improving quality and reducing costs in battery production-dry electrode technology

 and the core technology of solid-state battery-stacking. It has a corresponding patent layout and has produced related equipment.

3 Research progress on solid-state batteries at home and abroad

Researchers at the Korea Advanced Institute of Science and Technology (KIST) and Lawrence Livermore National Laboratory (LLNL) have made significant progress in the development of high-energy-density all-solid-state batteries.

 The latest research focus is on the design and synthesis of stable solid-state electrolytes, which are essential for safer and more efficient lithium battery technology.

Traditional lithium-ion batteries use liquid electrolytes, which are at risk of fire and explosion. To solve this problem, researchers are exploring non-flammable solid electrolytes. 

Although sulfide solid electrolytes have excellent ionic conductivity, their chemical properties with high-voltage cathode materials are unstable, hindering commercial feasibility. As a result, the industry turned to chloride-based solid-state electrolytes, 

which are known for their stability under high-voltage conditions.