Scaling the ionic conductivity and electrochemical properties of bio-based gel polymer electrolytes reinforced with Al2O3 nanofibers for energy storage applications

IF 3.1 3区化学 Q2 POLYMER SCIENCE

Polymer Bulletin Pub Date : 2024-10-16 DOI:10.1007/s00289-024-05542-0

Masum Das, Madhabi Konwar, Utpal Sadhonider, Lakhya J. Borthakur, Utpal J. Mahanta, Lakshi Saikia, Madhuryya Deka

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引用次数: 0

Abstract

Bio-based gel polymer electrolytes (GPEs) are gaining popularity in electrochemical energy storage devices due to their sustainability and environmental friendliness. Compared to synthetic polymer electrolytes, they are biocompatible and less toxic, making them safer for users and the environment. The present work develops cellulose acetate-based GPEs added with different amounts of Al₂O₃ nanofibers. The synthesized GPE exhibits a very high ionic conductivity of 2 × 10^–3 S/cm at room temperature as determined by impedance spectroscopy. FTIR results show that Al₂O₃ nanofibers are able to dissociate Li⁺ ions from contact ion pairs. XRD analysis demonstrates that the nanofibers can reduce the crystallinity of GPEs. From XPS studies it is confirmed that the nanofibers create conducting paths in GPEs through which ion diffusion can easily take place. Electrochemical investigations demonstrate that GPEs containing nanofibers display a remarkable voltage range of 4.9 V and great stability at the interface with metallic electrodes. Nanofibers can also increase the cationic transport number from 0.28 for GPEs with no nanofibers to 0.58 for GPEs loaded with 5 wt% nanofibers. The dimensional stability of GPEs is also found to be enhanced after nanofiber addition. The initial discharge capacity at 0.5 C for the Li|BGE|LiFePO₄ cell was recorded to be 135 mAh g⁻¹ in the first cycle and 128 mAh g⁻¹ with a coulombic efficiency above 95% after 25 cycles. These findings of the study suggest that nanofiber-reinforced bio-based GPEs can create high-performance, sustainable electrolytes for next-generation electrochemical devices.

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来源期刊

Polymer Bulletin 化学-高分子科学

CiteScore

6.00

自引率

6.20%

发文量

审稿时长

5.5 months

期刊介绍： "Polymer Bulletin" is a comprehensive academic journal on polymer science founded in 1988. It was founded under the initiative of the late Mr. Wang Baoren, a famous Chinese chemist and educator. This journal is co-sponsored by the Chinese Chemical Society, the Institute of Chemistry, and the Chinese Academy of Sciences and is supervised by the China Association for Science and Technology. It is a core journal and is publicly distributed at home and abroad. "Polymer Bulletin" is a monthly magazine with multiple columns, including a project application guide, outlook, review, research papers, highlight reviews, polymer education and teaching, information sharing, interviews, polymer science popularization, etc. The journal is included in the CSCD Chinese Science Citation Database. It serves as the source journal for Chinese scientific and technological paper statistics and the source journal of Peking University's "Overview of Chinese Core Journals."