This application note addresses a core process control challenge in battery electrode manufacturing: identifying and diagnosing non-uniform distributions of active materials before a defective electrode enters a full cell.
Industry estimates for cell manufacturing scrap rates range from 5 to 30%, with especially high rates during process ramp-up. Electrode manufacturing is a critical and costly step, and conventional offline analytical techniques require multiple hours for sample preparation alone.
Massbox® acquires elemental mapping results in less than 10 minutes, directly from solid electrode samples with minimal sample preparation.
The study analyzes a newly manufactured silicon carbon composite anode displaying "speckle-like" surface features visible under optical microscopy. Using LALI-TOF-MS and a 25-micron laser spot size, Massbox® produced elemental maps across two separate speckle regions. Results revealed that the speckles were rich in carbon and silicon carbide (SiC), not silicon as the quality engineer had hypothesized.
The maps also identified elevated levels of trace metallic elements, including chromium, which may help pinpoint the source of contamination in the electrode manufacturing process. Because each pixel contains a full mass spectrum, results are not limited to pre-specified elements.
The application note demonstrates how elemental mapping and depth profiling together support rapid defect diagnosis, manufacturing feedback loops, and scalable quality control for new battery chemistries.
