Abstract：The positive conductive slurries prepared by different types of conductive particles for lithium batteries were studied by using nuclear magnetic resonance (NMR) technology. By measuring the relaxation time and spectrum of the slurries, it was found that the relaxation time of carbon black slurry is negatively correlated with the BET value under the same grinding dispersion condition, and the relaxation spectrum of carbon black slurry is single-peak structure, indicating that carbon black is more easily dispersed. The relaxation spectra of carbon nanotube (CNT) slurry are all multi-modal, which indicates that the dispersion of CNT is poor. Further research results show that the larger the solid content of CNT slurry, the larger the specific surface area of the particles, the larger the relaxation time of the main peak of the relaxation spectrum, the lower the proportion of the main peak signal, indicating that the CNT is more prone to entanglement and aggregation in the solvent.
2024, Vol. 45 
