A Deeper Look at Hidden Damage: Nano-CT Imaging Maps Internal Battery Degradation - CleanTechnica

The article discusses advances in understanding and improving lithium-ion battery recycling through high-resolution nano-CT imaging, led by researchers at the National Renewable Energy Laboratory (NREL). Lithium-ion batteries rely on scarce and valuable minerals such as lithium, nickel, cobalt, manganese, and graphite, with much of the global supply chain controlled by China. To reduce dependence on foreign markets and extend the lifespan of critical materials, direct recycling of battery cathodes within the United States is being explored as a more efficient and cost-effective alternative to traditional recycling methods, which are energy-intensive and break materials down to their elemental forms. NREL’s nano-CT scanner, capable of 50-nanometer spatial resolution, allows nondestructive, real-time visualization of internal battery structures, revealing microscopic degradation that impacts battery performance. Researchers found that although end-of-life battery materials retained similar energy capacity to new cells, their charging rates were significantly reduced due to morphological damage—specifically, particle cracking within the cathode microstructure. This insight