Partially Neutralized Polyacrylic Acid as an Efficient Binder for Aqueous Ceramic-Coated Separators for Lithium-Ion Batteries.

Autor: Thang AQ; School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.; Personal and Home Care, Lubrizol Southeast Asia Pte. Ltd., 44 Tanjong Penjuru, Singapore, 609032, Singapore., Shen Y; School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore., Shi Z; Personal and Home Care, Lubrizol Southeast Asia Pte. Ltd., 44 Tanjong Penjuru, Singapore, 609032, Singapore., Yao G; Personal and Home Care, Lubrizol Southeast Asia Pte. Ltd., 44 Tanjong Penjuru, Singapore, 609032, Singapore., Wong SY; Personal and Home Care, Lubrizol Southeast Asia Pte. Ltd., 44 Tanjong Penjuru, Singapore, 609032, Singapore., Liu Z; Institute of Materials Research and Engineering, Agency for Science, Technology, and Research (A*STAR), 2 Fusionpolis Wa, Innovis, #08-03, Singapore, 138634, Singapore., Yan Q; School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.
Jazyk: angličtina
Zdroj: Chemistry, an Asian journal [Chem Asian J] 2023 Sep 15; Vol. 18 (18), pp. e202300538. Date of Electronic Publication: 2023 Aug 10.
DOI: 10.1002/asia.202300538
Abstrakt: A partially neutralized polyacrylic acid (Pn-PAA) is used for coating sub-micron-sized α-alumina on a conventional microporous polyolefin separator, fabricating a ceramic-coated separator (CCS). Pn-PAA acts as a dispersant and binder by adsorbing itself on alpha(α)-alumina surfaces under acidic condition through the columbic interaction, providing a repulsive force to disperse fine alumina in aqueous suspension, and binds alumina strongly on plasma-treated separator through hydrogen bonding. This CCS shows favorable wettability in carbonate-based liquid electrolyte and ionic conduction due to the high hydrophilicity of Pn-PAA and alumina. With that, this study found that Pn-PAA-made-CCS yields a substantial adhesion strength of ~106 N/m with enhanced cycle stability, a specific capacity of 145.0 mAh/g after 200 cycles at 1 C at room temperature in half cells (LFP/Li metal).
(© 2023 Wiley-VCH GmbH.)
Databáze: MEDLINE
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