journal article·2026-03-13

External Armoring Nickel-Rich Cathode with Thermoset-Functionalized Polyurethane for Enhanced Performance

Yutao Xu, Xiuxia Zuo, Jun Liu, Jiamin Duan, Xingchen Liu, Suzhe Liang, Peter Müller-Buschbaum, Ya-Jun Cheng

ACS Applied Polymer Materials· Volume 8· Issue 5
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Abstract

Nickel-rich Li[Ni x Co y Mn 1– x – y ]O 2 (NCM) is critical for high-energy-density lithium-ion batteries but suffers from severe capacity fading and short cycle life, especially in high-nickel compositions such as NCM811, due to structural and interfacial instability. To address this, we develop an in situ-formed, thermoset cross-linked polyurethane acrylate (PUA) binder that acts synergistically as a robust binder and an artificial cathode–electrolyte interphase (CEI). This multifunctional PUA layer effectively shields active material from electrolyte corrosion, mitigates mechanical stress from volume change, and suppresses microcrack formation. As a result, the PUA-modified NCM811 cathode exhibits significantly improved cycling stability with 88.9% capacity retention after 200 cycles and superior rate capability (91 mAh g –1 at 5 C). Furthermore, mechanistic investigations confirm the suppression of irreversible phase transitions and metal dissolution. This work demonstrates a practical electrode engineering strategy for stabilizing nickel-rich cathodes through interfacial control.
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Research context

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced Battery Technologies Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering

Nankai University

Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhongguan West Rd, Ningbo, Zhejiang 315201, P. R. China

School of New Energy, Ningbo University of Technology, No. 201, Fenghua Road, Jiangbei District, Ningbo, Zhejiang 315211, P. R. China

Allnex Resins (China) Co. Ltd., 127 Taishan Road New District, Suzhou 215129, P. R. China

Eastern Institute for Advanced Study, Ningbo Institute of Digital Twin

Eastern Institute of Technology

TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, Technical University of Munich, James-Franck-Str. 1, Garching 85748, Germany

College of Renewable Energy

Hohai University

Funding

National Key Research and Development Program of China · Deutsche Forschungsgemeinschaft · Natural Science Foundation of Zhejiang Province · Zhejiang Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology

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