The significance of aqueous binders in lithium-ion batteries. (September 2021)

• Record Type: Journal Article
• Authors: Lingappan, Niranjanmurthi; Kong, Lingxi; Pecht, Michael
• Is Part Of: Renewable & sustainable energy reviews. Volume 147(2021)
• Publication Date: 2021-09
• Subjects: Lithium-ion batteries -- Capacity decay -- Polyvinylidene fluoride -- Polyacrylic acid -- Aqueous binders; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.rser.2021.111227
• Languages: English
• ISSNs: 1364-0321

Abstract

Abstract: The demand for safer and cost-effective lithium-ion batteries with higher energy density and longer life requires thorough investigation into the structural and electrochemical behavior of cell components. Binders are a key component in an electrochemical cell that function to interconnect the active material and conductive additive and adhere firmly to the current collector. The characteristic changes in binders during device operation can result in desquamation of active materials from the current collector and induce capacity degradation. Here we provide a comprehensive evaluation of the pros and cons of the traditional polyvinylidene fluoride (PVDF) binder, the correlation between PVDF and capacity loss, and the research progress of aqueous-based binders. Although aqueous-based slurry technology has spurred widespread interest across myriad topics, the purpose of this study is to examine whether aqueous binders can facilitate breakthroughs in future battery technology from the commercialization perspective. By critically analyzing the electrochemical performance of commercially viable anodes and cathodes, we address the key advantages as well as disadvantages of aqueous-based binders. Although aqueous binders outperform the low expandable graphite anode and metal oxide cathodes, their efficiency for largely expandable silicon anodes is unsatisfactory. Thus, aggressive effort is required to develop high-performance binders for future battery technology. Graphical abstract: Image 1 Highlights: Pros and cons of traditional polyvinylidene fluoride binder is reviewed. Influence of polyvinylidene fluoride over capacity decay is discussed. Recent advances in aqueous based binder is summarized. Challenges and future prospects for advanced binders for future batteries is outlined.