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| Study on Preparation and Properties of Polyethylene Oxide-based Solid Electrolytes Reinforced with Cellulose Nanofibrils |
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| DOI：10.11980/j.issn.0254-508X.2026.05.002 |
| Key Words:cellulose nanofibrils polyethylene oxide solid electrolyte lithium-ion batteries |
| Author Name | Affiliation | Postcode | | DONG Xinyu* | 1State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | YANG Rendang | 1State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | HU Min | 1State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | LAN Jing | 1State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | WANG Yang* | 2College of Textile Science and Engineering, Wuyi University, Jiangmen, Guangdong Province, 529020 | 529020 |
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| Abstract:This study fabricated solid electrolytes polyethylene oxide (PEO)/LiTFSI/CNF using cellulose nanofibril (CNF) as a green reinforcing filler via solution casting, and systematically investigated the effects of CNF content on the structure and properties of the electrolytes. The results demonstrated that CNF formed a three-dimensional network framework within the PEO matrix through physical crosslinking, significantly enhancing the mechanical strength and high-temperature dimensional stability of the electrolyte. This reinforcement effectively improved lithium dendrite suppression and extended the safety margin of the battery. Moreover, an appropriate amount of CNF suppressed PEO crystallization and promoted the formation of amorphous regions, providing more continuous pathways for lithium-ion transport. The electrolyte with 3% CNF exhibited optimal overall performance: an ionic conductivity of 5.95×10⁻⁴ S/cm at 60 ℃, a lithium-ion transference number of 0.539, and an electrochemical stability window of 4.98 V. The solid-state lithium-ion battery assembled with this electrolyte demonstrating excellent electrochemical stability and promising practical potential. |
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