In situ Interweaved Binder Framework Mitigating the Structural and Interphasial Degradations of High‐nickel Cathodes in Lithium‐ion Batteries. (2nd March 2023)

• Record Type: Journal Article
• Authors: Jin, Biyu; Cui, Zehao; Manthiram, Arumugam
• Is Part Of: Angewandte Chemie. Volume 135:Number 15(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-03-02
• Subjects: Cathode-to-Anode Crossover -- Electrode-Electrolyte Interphase -- High-Nickel Cathode -- In Situ Interweaved Binder -- Particles Pulverization; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202301241
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: The practical viability of high‐nickel layered oxide cathodes is compromised by the interphasial and structural degradations. Herein, we demonstrate that by applying an in situ interweaved binder, the cycling stability of high‐nickel cathodes can be significantly improved. Specifically, the results show that the resilient binder network immobilizes the transition‐metal ions, suppresses electrolyte oxidative decomposition, and mitigates cathode particles pulverization, thus resulting in suppressed cathode‐to‐anode chemical crossover and ameliorated chemistry and architecture of electrode‐electrolyte interphases. Pouch full cells with high‐mass‐loading LiNi0.8 Mn0.1 Co0.1 O2 cathodes achieve 0.02 % capacity decay per cycle at 1 C rate over 1 000 deep cycles at 4.4 V (vs. graphite). This work demonstrates a rational structural and compositional design strategy of polymer binders to mitigate the structural and interphasial degradations of high‐Ni cathodes in lithium‐ion batteries. Abstract : An in situ interweaved binder with multiple binder‐cathode chemical interactions and robust mechanical strength enables a strong cathode framework. By coordinating with transition‐metal ions and preventing the continuous electrolyte attack, the cathode structural integrity and the chemistry/architecture of the electrode‐electrolyte interphase are improved, thus enabling high‐mass‐loading high‐nickel cathodes with excellent stability.