Evaluation of LiPF₆, LiTFSI, and LiBOB Electrolytes for Cellulose Based Solid Polymer Electrolytes (SPEs)

Abstract:

Cellulose polymer-based Solid Polymer Electrolytes (SPEs) have gained attention as an environmentally friendly and sustainable alternative for energy storage applications, particularly in lithium-ion batteries. The proper selection of electrolytes is crucial for enhancing the performance and stability of SPEs. This study presents a comparative analysis of LiBOB, LiPF₆ and LiTFSI electrolytes for cellulose-based solid polymer electrolytes (SPEs). The cellulose-SPEs were evaluated based on their mechanical and electrochemical performance. Our findings reveal that cellulose-LiTFSI exhibited the highest electrolyte uptake (784%) and electrolyte retention (88.69%), followed by cellulose-LiPF₆ (690% uptake and 87.34% retention), and cellulose-LiBOB (355.33% uptake and 78.04% retention). Morphological research reveals all SPEs exhibit porous structures and demonstrate contact with the electrolyte, however LiBOB cellulose does not effectively absorb the electrolyte. Heat treatment at 150°C for 4 hours demonstrated significant differences in thermal stability, where cellulose-LiBOB maintained structural integrity with negligible alteration in color, while cellulose-LiPF₆ and cellulose-LiTFSI darkened and underwent decomposition. The cellulose LiTFSI has the greatest electrochemical stability, with a potential window of 4.25 V, and the highest ionic conductivity, measuring 1.359 x 10-6 C/m. Conversely, cellulose LiBOB (3.37) has better electrochemical stability than LiPF₆ (2.91 V), while cellulose LiBOB has the lowest ionic conductivity (1.424 x 10^-7 C/m). These results suggest that electrolyte selection profoundly impacts the mechanical and electrochemical properties of cellulose-based SPEs, with LiTFSI showing best possibility for potential application in lithium-ion batteries.

• Periodical: Defect and Diffusion Forum (Volume 442)
• Pages: 35-42
• DOI: https://doi.org/10.4028/p-c1Y67d
• Online since: May 2025
• Authors: Mohammad Wahyu Andriyan*, Muhammad Ragil Saputra, Endah Puji Astuti, Zalfa Alfatinnisa, Rosydatul Khoiriyah, Paskaline Sophie Rinjani, Citra Intan Rizky Azzahra, Ilham Alkian
• Keywords: Cellulose-Based Solid Polymer Electrolyte, Electrochemical Properties, Electrolyte Compatibility, Heat Resistance

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