文献类型：期刊文献

英文题名：Effect of comb polymer dispersants with different molecular structures on the performance of LiFePO4 suspensions

作者：Dong, Yarui[1];Xu, Jian[2,3];Du, Ping[2,3];Feng, Zhongjun[2,3];Zheng, Baicun[1,4]

机构：[1]East China Univ Sci & Technol, Res & Dev Ctr Sports Mat, Shanghai, Peoples R China;[2]Shanghai Sunrise Polymer Mat Co Ltd, Shanghai, Peoples R China;[3]Shanghai Engn Res Ctr Construct Admixture, Shanghai, Peoples R China;[4]East China Univ Sci & Technol, Res & Dev Ctr Sports Mat, Shanghai 200237, Peoples R China

年份：2023

外文期刊名：JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001032237200001)】；

基金：AcknowledgmentsThe authors would like to gratefully acknowledge the financial support (19DZ2293200) from Science and Technology Commission of Shanghai Municipality.

语种：英文

外文关键词：Comb polymer dispersants; lithium ion batteries; LiFePO4; adsorption; rheology

摘要：A series of comb polymers poly(2-(dimethylamino)ethyl methacrylate (DMAEMA)-co-methacrylic acid (MAA)-co-methoxy polyethylene glycol methacrylate (MPEGMA)) (poly(DMAEMA-MAA-MPEGMA, DMM) were synthesized and used as N-methyl-2-pyrolidinone (NMP)-based lithium iron phosphate (LFP) suspension dispersants. The effects of the grafting density of the carboxyl group as the anchoring group and the chain length of the side chain of PEG, which plays the role of spatial site resistance, on the rheological properties and suspension stability of the slurry were systematically investigated. By investigating the adsorption amount and thickness of DMM on the LFP surface, combined with calculations based on the scalar law and Flory theory, the molecular structure of the comb polymer dispersant was revealed to influence the adsorption and dispersion performance. The dispersion of LiFePO4 was due to the synergistic effects of adsorption and steric hindrance effect, which resulted that dispersants with medium carboxyl density and PEG side chain length can improve the dispersion performance and stability.