Striking a Balance: Exploring Optimal Functionalities and Composition of Highly Adhesive and Dispersing Binders for High-Nickel Cathodes in Lithium-Ion Batteries

Daun Jeong, Da Sol Kwon, Hee Joong Kim, Jimin Shim

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Nickel-rich layered oxide, LiNixCoyMnzO2 (NCM, x > 0.8), has emerged as a promising cathode material for lithium-ion batteries due to its high specific capacity and energy density. However, there remains a challenge regarding NCM degradation during cycling, associated with interfacial side reactions and microcrack formation. Herein, a functional poly(norbornene-co-norbornene dicarboxylic acid-co-heptafluorobutyl norbornene imide) (PNCI)-based binder system is introduced, with controlled functionalities and monomer compositions, to preserve the structural integrity of NCM. The PNCI binder system incorporates three different norbornene-derived monomers with distinct functionalities, allowing for multifunctionality, including electro-chemo-mechanical stability, strong adhesion, and dispersibility. By systematically adjusting the molar composition of the PNCI binders, the overall binder characteristics are fine-tuned, optimizing the adhesion and dispersion of electrode components. The optimized PNCI binder, with desired adhesion strength, surface energy, and polarity, plays a crucial role in facilitating the formation of a uniform electrode structure with a high areal mass loading of NCM, ensuring long-term cycling stability. This study highlights the significance of striking a balance between functionalities and composition in binder systems to achieve high-performance NCM cathodes.

Original languageEnglish
Article number2302845
JournalAdvanced Energy Materials
Volume13
Issue number46
DOIs
StatePublished - 8 Dec 2023

Bibliographical note

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Keywords

  • high-nickel cathode materials
  • lithium-ion batteries
  • polymer binders
  • ring-opening metathesis polymerization
  • uniform electrode dispersion

Fingerprint

Dive into the research topics of 'Striking a Balance: Exploring Optimal Functionalities and Composition of Highly Adhesive and Dispersing Binders for High-Nickel Cathodes in Lithium-Ion Batteries'. Together they form a unique fingerprint.

Cite this