Water‐soluble polypyrrole‐polybis (4‐oxy benzene sulfonic acid) phosphazene composites and investigation of their performance as cathode binder in Li‐ion batteries

Duyar, H., Büşra Çelebi, E., Güney, E. and Hacivelioğlu, F. (2024) Water‐soluble polypyrrole‐polybis (4‐oxy benzene sulfonic acid) phosphazene composites and investigation of their performance as cathode binder in Li‐ion batteries. Chemsuschem, (doi: 10.1002/cssc.202301799) (PMID:38285804) (Early Online Publication)

Abstract

Current electric storage systems eagerly focus on high‐power and energy‐dense Lithium‐ion batteries to cope with increasing energy storage demands. Since cathode materials are one of the bottlenecks of these batteries, there is much interest in layered lithium‐rich manganese oxide‐based (LLMO) cathodes which can develop this technology. However, Initial Coulombic Efficiency (ICE) loss, poor rate performance and cycling instability issues are still persistent as problems to be solved for these materials. Recent research shows that water‐soluble binders are effective in improving the performance of LLMO materials. Herein, we describe the synthesis, characterisation, and application of a series of water‐soluble composites as a binder for LLMO cathodes. The PPy is introduced as part of the binder to improve the electronic conductivity and two different oxidants and various PPy to PSAP ratios were used to optimise the final properties. The electrochemical performance and morphology of the cathodes before and after cycling were investigated and compared with the conventional PVDF binder. The LLMO−2c electrode showed excellent charge‐discharge performance, especially at 5 C and 10 C rates, and high cycling stability at 0.2 C whilst maintaining a final capacity of 184 mAh/g after 200 cycles, which is equal to 89.3 % capacity retention.

• Item Type: Articles
• Additional Information: We greatly acknowledge TUBITAK for funding our research under grant numbers 113Z314 & 118Z711which led to the development of the materials used in this work. The post-doctoral bursary (2219) provided by TUBITAK to EBC (1059B192000291) is greatly acknowledged.
• Keywords: Polymer Composites, Lithium-ion battery, Water-soluble binder, Layered lithium rich cathode, Polyphosphazene
• Status: Early Online Publication
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Hacivelioglu, Dr Ferda
• Authors: Duyar, H., Büşra Çelebi, E., Güney, E., and Hacivelioğlu, F.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: Chemsuschem
• Publisher: Wiley
• ISSN: 1864-5631
• ISSN (Online): 1864-564X
• Published Online: 20 February 2024
• Copyright Holders: Copyright: © 2024 The Authors
• First Published: First published in Chemsuschem 2024
• Publisher Policy: Reproduced under a Creative Commons licence