Multifunctional Umbrella: In Situ Interface Film Forming on the High‐Voltage LiCoO2 Cathode by a Tiny Amount of Nanoporous Polymer Additives for High‐Energy‐Density Li‐Ion Batteries
Source abstract
Abstract
Abstract The LiCoO2 (LCO) cathode is foreseen for extensive commercial applications owing to its high specific capacity and stability. Therefore, there is considerable interest in further enhancing its specific capacity by increasing the charging voltage. However, single‐crystal LCO suffers from a significant capacity degradation when charged to 4.5 V due to the irreversible phase transition and unstable structure. Herein, an ultra‐small amount (0.5% wt. in the electrode) of multi‐functional PIM‐1 (a polymer with intrinsic microporosity) additive is utilized to prepare a kind of binder‐free electrode. PIM‐1 modulates the solvation structure of LiPF6 due to its unique structure, which helps to form a stable, robust, and inorganic‐rich cathod‐eelectrolyte interphase (CEI) film on the surface of LCO at a high voltage of 4.5 V. This reduces the irreversible phase transition of LCO, thereby enhancing the cyclic stability and improving the rate performance, providing new perspectives for the electrodes fabrication and improving LCO‐based high‐energy‐density cathodes.
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Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Supercapacitor Materials and Fabrication
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Chair for Functional Materials Department of Physics TUM School of Natural Sciences Technical University of Munich 85748 Garching Germany
Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences 1219 Zhongguan West Rd Ningbo Zhejiang Province 315201 P. R. China
School of Materials Science & Engineering Shanghai University Shanghai 200444 P. R. China
Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences 19A Yuquan Rd, Shijingshan District Beijing 100049 P. R. China
College of Renewable Energy Hohai University 1915 Hohai Ave Changzhou Jiangsu Province 213200 P. R. China
Heinz Maier‐Leibnitz Zentrum (MLZ) Technical University of Munich Lichtenbergstr. 1 85748 Garching Germany
Funding
Deutsche Forschungsgemeinschaft · National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province · Science and Technology Innovation 2025 Major Project of Ningbo
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