A new lithium manganese iron phosphate (LMFP) cathode active material developed by Integrals Power could increase the real-world range of electric vehicles (EVs) by extending the useable capacity of the battery under high discharge conditions.
Conventional lithium iron phosphate (LFP) chemistries experience a reduction in useable capacity when the battery is operated at high discharge conditions, such as prolonged periods of highway driving or in high-power applications such as electric mining vehicles. Tests carried out by testing and research company QinetiQ have demonstrated that the LMFP cells retain a significantly higher percentage of their nominal
Source: Integrals Power capacity than LFP under these conditions.
The LMFP cells retained 99% of their original capacity at 2C (30 minutes discharge time), and 95% at 5C (12 minutes discharge time). Even at an extreme 10C (6 minutes discharge time), which is far beyond the limits of any use case, capacity retention was an impressive 60%. This demonstrates the material’s ability to deliver high performance without compromising durability — attributes essential to demanding applications such as electric vehicles (EVs).
QinetiQ’s assessments follow other third-party testing last year that showed Integrals Power had achieved the breakthrough of incorporating a manganese content of 80% and delivering nearly 150 mAh/gr specific capacity, while overcoming the reduction in energy density — and therefore EV range — that usually occurs at such high levels.
As a result, Integrals Power has demonstrated that its LMFP material can be used to make cells that will enable battery packs to deliver an optimal balance of high performance, long range and long life that exceeds the capability of LFP but at less cost and less reliance on critical minerals than nickel cobalt manganese (NCM). Using this technology, automotive OEMs could extend the real-world range of their vehicles, or achieve the same range using fewer cells, therefore enabling lighter, less expensive batteries.
QinetiQ conducted the tests on pouch cells made using the Integrals Power LMFP material and standard commercial-grade graphite anodes and liquid electrolyte. Each cell was tested at an electrode loading of 2mAh/cm2.
The LMFP used in the tests is one of a wide range of 25 cathode active materials developed and patented by Integrals Power. All are developed and manufactured at the company’s U.K. facility, which includes a pilot plant capable of producing 20 tons a year from high-purity raw materials rather than bulk precursors. Samples are already with a wide range of customers across the battery manufacturing industry, including energy storage and EV sectors, for evaluation and benchmarking.
