Battery technology startup Group1 has unveiled the world’s first potassium-ion battery (KIB) in the 18650 form factor. This innovative KIB technology, packaged in the widely-used cell format, presents a promising alternative to current lithium-based batteries, addressing their numerous drawbacks.
The new KIB design boasts an energy density comparable to that of lithium iron phosphate (LiFePO4 or LFP) and sodium-ion batteries (NIB). However, it excels in critical performance metrics such as fast charging capability, safety, number of charge cycles, and low-temperature performance, while also being more economical. This performance edge is attributed to Group1’s specially engineered cathode material, Potassium Prussian White (KPW), originally developed in the lab of Nobel laureate Professor JB Goodenough, known for pioneering lithium-ion batteries.
From a sustainability perspective, KIBs stand out by using readily available raw materials and eschewing critical minerals like cobalt, nickel, copper, and lithium, which are often associated with supply chain vulnerabilities and ethical concerns. Cobalt, in particular, is noted for its controversial, unsustainable, and toxic sourcing methods.
Moreover, KIBs are compatible with existing manufacturing setups, utilizing industry-standard graphite anodes, separators, and electrolytes—a compatibility that sodium-ion batteries lack. With an output of 3.7 V, KIBs ensure seamless integration with current lithium-ion battery applications.
The 18650 cell format is one of the most common battery formats globally, found in devices ranging from flashlights and power banks to laptops and electric vehicles, including models like the Tesla Model X and Model S. The dimensions of the 18650 battery are 18 mm in diameter and 65 mm in length.
Although not yet commercially available, Group1 is actively distributing samples to its partners among Tier 1 OEMs and cell manufacturers to promote widespread adoption of this innovative technology.
This development marks a significant milestone in battery technology, promising a more sustainable, efficient, and ethical alternative to current lithium-ion batteries.
