Makale detayı · 2026
Experimental and computational structure study of the commercial NMC622 lithium-ion battery electrode
- Yıl
- 2026
- ISSN
0884-2914- Tür
- article
Veri kaynağı ayrımı
- YÖKSİS YÖKSİS makale kaydı
- OpenAlex OpenAlex zenginleştirmesi (özet, atıf, konular)
Özet
İngilizce (OpenAlex)
Reliable and traceable characterization of battery electrode materials is essential for standards and harmonized measurements in the growing lithium-ion battery sector. We report a coordinated interfacility study of commercial cathode NMC622, performed within the EURAMET projects OpMetBat and HyMetBat to evaluate reproducibility, uncertainty, and cross-method comparability. A single batch was analyzed using synchrotron X-ray diffraction, high-resolution neutron diffraction at two facilities, transition metal K-edge XANES/EXAFS, DFT-based electronic structure and spectral simulations, and electrochemical measurements. Neutron diffraction yields consistent lattice parameters and transition metal occupancies and enables traceable quantification of lithium content. Lithium loss from neutron refinement agrees with electrochemical charge extraction at low delithiation, whereas deviations at higher states of charge indicate parasitic faradaic processes. XANES and EXAFS confirm local coordination and oxidation states, while DFT reproduces spectral features. Operando impedance correlates with structural evolution and supports state-of-charge metrology. Together, these cross-facility results establish a robust metrological workflow for layered oxide cathode materials.
Konular
- Advancements in Battery Materials
- Electron and X-Ray Spectroscopy Techniques
- X-ray Diffraction in Crystallography
Birincil konu Advancements in Battery Materials