TY - JOUR
T1 - Striking a Balance
T2 - Exploring Optimal Functionalities and Composition of Highly Adhesive and Dispersing Binders for High-Nickel Cathodes in Lithium-Ion Batteries
AU - Jeong, Daun
AU - Kwon, Da Sol
AU - Kim, Hee Joong
AU - Shim, Jimin
N1 - Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023/12/8
Y1 - 2023/12/8
N2 - 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.
AB - 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.
KW - high-nickel cathode materials
KW - lithium-ion batteries
KW - polymer binders
KW - ring-opening metathesis polymerization
KW - uniform electrode dispersion
UR - http://www.scopus.com/inward/record.url?scp=85174227333&partnerID=8YFLogxK
U2 - 10.1002/aenm.202302845
DO - 10.1002/aenm.202302845
M3 - Article
AN - SCOPUS:85174227333
SN - 1614-6832
VL - 13
JO - Advanced Energy Materials
JF - Advanced Energy Materials
IS - 46
M1 - 2302845
ER -