计量学报2024，Vol.45Issue(4)：580-585,6.DOI:10.3969/j.issn.1000-1158.2024.04.18
基于核磁共振技术测量研究锂电池正极导电浆料的分散性
Evaluation of Lithium-battery Conductive Slurry Dispersion by Nuclear Magnetic Resonance Technology
摘要
Abstract
The positive conductive slurries prepared by different types of conductive particles for lithium batteries are studied by using nuclear magnetic resonance(NMR)technology.By measuring the relaxation time and spectrum of the slurries,it is 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.关键词
电学计量/导电浆料/锂电池/分散性/核磁共振/弛豫时间/弛豫谱Key words
electrical measurement/conductive slurry/lithium battery/dispersion/NMR/relaxation time/relaxation spectrum分类
通用工业技术引用本文复制引用
周萍,栾振超..基于核磁共振技术测量研究锂电池正极导电浆料的分散性[J].计量学报,2024,45(4):580-585,6.基金项目
福建省市场监督管理局科技项目(FJMS2022041) （FJMS2022041）
