Meaning
Analytical technique that uses a strong magnetic field and radio frequency pulses to study the local chemical environment of atomic nuclei provides deep insights into the structural changes of battery materials. This nuclear magnetic resonance spectroscopy is a powerful diagnostic tool for identifying the molecular structure of electrolyte additives and the phase transitions of active materials. Sourcing specialists utilize these analytical results to evaluate the quality and purity of the materials used in the cells.
It applies to both solid and liquid samples, helping to trace the chemical reactions that occur during battery cycling.
Material Characterization
Characterization of the active materials and electrolytes at the atomic level is necessary to understand the mechanisms of degradation and phase changes during cycling. Sourcing teams use this spectroscopy data to verify that the chemical composition of the supplied materials matches the specified design. This analysis helps in identifying the presence of impurities or structural defects that could compromise cell performance or safety.
High-precision measurements of this type are critical for the qualification of next-generation battery chemistries.
In Situ Studies
Real-time tracking of the lithium ion movement during charging and discharging cycles can be achieved using in situ techniques. This capability allows researchers to observe the dynamic changes in the electrode structure and the formation of the solid electrolyte interface. Sourcing specialists use these findings to evaluate the stability of new material formulations and their suitability for high-performance applications.
This detailed understanding helps in selecting suppliers who use advanced, stable materials in their cell designs.
Chemical Identification
Identification of the decomposition products in the electrolyte after extended cycling is another important application of this spectroscopy. By analyzing the chemical species formed during battery aging, engineers can identify the root causes of capacity loss and gas generation. Sourcing agreements rely on this information to hold suppliers accountable for the quality of their electrolyte formulations.
This diagnostic tool ensures that the chemistry remains stable and that the cell will meet its long-term reliability and lifetime targets.
