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On August 28, Great Power (also known as Penghui Energy) officially unveiled its brand new all-solid-state battery. Some key features include a 280 Wh/kg energy density and planned mass production in 2026. Furthermore, Great Power claims that they aim to produce these batteries at just 15% higher cost compared to current lithium-ion batteries. The battery has a capacity of 20 Ah.
At the launch, the Guangzhou-based company shared that there are currently three main technical methods to achieve a fully solid-state battery: polymer, sulfur/halide, and oxide – with Great Power opting for the oxide route. The company claims to have solved the process and technical issues of oxide solid electrolytes and achieved a two-dimensional breakthrough in the process and materials of solid-state batteries.
Typically, oxide solid electrolytes need to be produced through a high-temperature sintering process, resulting in the inherent brittleness of ceramic materials. Great Power has developed a wet coating process for electrolytes that addresses the issue of preparing oxide electrolytes and significantly simplifies the production process.
The battery prototype showcased at the launch is a first-generation product. Due to the simplified production process, the cost is expected to be just 15% higher than that of conventional lithium-ion batteries today. In the next 3 to 5 years, the company aims to further optimize the process and reduce material costs, targeting cost parity with lithium-ion batteries.
These batteries use inorganic solid electrolytes to replace separators and liquid electrolytes, thereby eliminating the safety hazards associated with organic electrolytes. This opens up more possibilities for developing the next generation of high-performance solid-state batteries.
Great Power claims that their solid-state batteries have a lifespan of 600 charge-discharge cycles and that this can be achieved at ambient temperatures ranging from -20°C to 85°C. Currently, the energy density stands at 280 Wh/kg, but Great Power believes that by 2025, the batteries will boast a capacity of over 300 Wh/kg, thanks to the use of higher silicon ratios in the anode.
Pilot research and development, along with small-scale manufacturing, will be initiated in 2025, followed by the establishment of production lines and mass production in 2026.
Established in 2001 as a lithium-ion battery manufacturer, Great Power produces batteries for electric vehicles, but this is just one of their five core business areas. The company appears to be more focused on energy storage solutions.
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