Financial Associated Press, December 12 (Reporter Liu Yue, Zeng Chuchu) To jointly develop a series of new energy battery materials for solid state batteries, Sunwoda (300207.SZ) has partnered with Xiamen Tungsten New Energy (688778.SH), focusing on the research and development of solid state battery electrolytes and related materials.

Sunwoda announced in the evening that its subsidiary Sunwoda Electronic Power signed the "Solid State Battery Global Strategy Cooperative Framework Agreement" with Xiamen Tungsten New Energy. The two parties will carry out extensive and in-depth cooperation regarding the research and development, mass production, and market development of series of new energy battery materials for solid state batteries, establishing a strategic partnership.

The cooperation includes four parts: the development of Cathode Material for solid state batteries, the development of electrolytes and related materials for solid state batteries, joint development of solid state batteries, and industrialization cooperation.

The announcement mentioned that Sunwoda Electronic Power will rely on its solid research and manufacturing technology accumulation in Lithium Battery and solid state battery fields, and based on the new Cathode Material and solid electrolytes provided by Xiamen Tungsten New Energy, will develop high energy density and high safety solid state batteries.

Specifically, this includes the construction of a composite Cathode ion and electron conductive network, the development of high-stability electrolyte films, and the development of a lithium metal anode with high Coulombic efficiency without lithium dendrites, to meet the commercial application needs of solid state batteries in the fields of new energy vehicles and energy storage systems.

From the current development progress of Sunwoda's solid state battery, the company stated on the interactive platform that its power-type solid state battery is already in the laboratory stage and is actively connecting with customers in related fields. Currently, through the use of lithium metal on the anode, the energy density of the solid state battery has been further increased to 500Wh/kg, and there are already laboratory prototype samples. It is expected to complete the production of laboratory samples of all solid state batteries with energy density greater than 700Wh/kg by 2027.

Sunwoda also mentioned on the interactive platform that the company possesses technical reserves related to oxides, sulfides, and polymers. In terms of solid state electrolytes, Xiamen Tungsten New Energy has laid out two technical routes for oxides and sulfides. Currently, solid state electrolyte materials are primarily based on the oxide route, with sulfides being the mainstream direction for the future.

During a research meeting with Institutions in November, Xiamen Tungsten's New Energy stated that the oxide route technical process is similar to that of lithium cobalt oxide and ternary materials. The main pain points of the sulfide technology route lie in lithium sulfide, which has a complex synthesis process and an expensive price. The company has developed a new lithium sulfide synthesis process, and based on the results from small-scale and pilot tests, the Technical Indicator is promising, with significant cost reduction potential.

In terms of Cathode Material, Xiamen Tungsten's New Energy stated that the Cathode Material matching the oxide route Solid State Battery has been successfully supplied; regarding the Cathode Material for the sulfide route Solid State Battery, the company has collaborated with a well-known battery enterprise to develop a brand-new structure of Cathode Material named NL. Its structure is relatively stable, with a wider interlayer spacing, and during the lithium ion release and uptake process, there is minimal deformation, making the solid-solid interface of the Solid State Battery less prone to damage. Furthermore, this new structure of Cathode Material significantly outperforms traditional lithium cobalt oxide and ternary material products in key performance areas such as energy density, discharge rate, and cycle life, making it a suitable Cathode Material for Solid State Batteries.

From the perspective of the Solid State Battery Industry, although there is great anticipation for the future of Solid State Batteries, the path to large-scale commercialization still faces multiple challenges. The conductivity, interface stability, and cost-effectiveness of solid electrolyte materials are currently urgent technical challenges that need to be overcome. Industry experts have pointed out that the production of Solid State Batteries requires significant modifications to existing Lithium Battery production lines, and it is also necessary to address the compatibility issues between the electrolyte and electrode materials to truly achieve large-scale mass production.