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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 32: Poster Session II
CPP 32.18: Poster
Donnerstag, 20. März 2025, 09:30–12:00, P3
Polymer of intrinsic microporosity as the silicon-based anode electrode additive — •Ming Yang1, Ruoxuan Qi1, Ya-Jun Cheng2, Yonggao Xia2, and Peter Müller-Buschbaum1 — 1TUM School of Natural Sciences, Chair for Functional Materials, 85748 Garching, Germany — 2Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, 1219 Zhongguan West Rd, Ningbo, 315201, Zhejiang Province, P. R. China
Silicon-based anodes are promising alternatives due to their high theoretical specific capacity and low voltage platform to traditional graphite anodes for high-energy-density lithium-ion batteries (LIBs). However, their performance is significantly hindered by silicon's substantial volume expansion during cycling, which often leads to electrode degradation. Therefore, it is crucial to design a robust electrode structure and establish a stable solid electrolyte interface (SEI) to address these challenges. Herein, an intrinsic microporosity polymer PIM-COOH is prepared, which has good compatibility with the polyacrylic acid (PAA) binder as a silicon-based anode additive. The microporous structure of the PIM-COOH molecule can effectively improve the transport of lithium ions and improve the electrochemical kinetics. In addition, due to the inherent microporous properties of PIM-COOH additives, the affinity between the electrode and the electrolyte is enhanced. As a result, good lithium-ion transport and mechanical integrity are maintained, resulting in improved long-term stability and high-rate performance.
Keywords: Lithium-Ion Battery; Silicon-Based Anode; Polymer of Intrinsic Microporosity