董昕宇,杨仁党,胡敏,蓝敬,王阳.纤维素纳米纤丝增强聚环氧乙烷基固态电解质的制备及性能研究[J].中国造纸,2026,45(5):12-21 本文二维码信息
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纤维素纳米纤丝增强聚环氧乙烷基固态电解质的制备及性能研究
Study on Preparation and Properties of Polyethylene Oxide-based Solid Electrolytes Reinforced with Cellulose Nanofibrils
收稿日期：  
DOI：10.11980/j.issn.0254-508X.2026.05.002
关键词:  纤维素纳米纤丝  聚环氧乙烷  固态电解质  锂离子电池
Key Words:cellulose nanofibrils  polyethylene oxide  solid electrolyte  lithium-ion batteries
基金项目:
作者单位邮编
董昕宇* 1华南理工大学先进造纸与纸基材料全国重点实验室,广东广州,510640 510640
杨仁党 1华南理工大学先进造纸与纸基材料全国重点实验室,广东广州,510640 510640
胡敏 1华南理工大学先进造纸与纸基材料全国重点实验室,广东广州,510640 510640
蓝敬 1华南理工大学先进造纸与纸基材料全国重点实验室,广东广州,510640 510640
王阳* 2五邑大学纺织科学与工程学院,广东江门,529020 529020
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摘要:本研究采用溶液浇铸法成功制备了以纤维素纳米纤丝（CNF）作为绿色增强填料的聚环氧乙烷（PEO）/LiTFSI/CNF固态电解质，并系统考察了CNF含量对其结构与性能的影响。结果表明，CNF通过物理交联在PEO基体中构建了三维网络骨架，显著增强了电解质的力学性能与高温尺寸稳定性，进而有效提升了其抑制锂枝晶的能力与电池安全边界。同时，适量的CNF可抑制PEO结晶，促进无定形区的形成，为锂离子传输提供更多的连续通道。当CNF含量为3%（以PEO质量计）时，该电解质表现出最优的综合性能，在60 ℃下离子电导率达5.95×10⁻⁴ S/cm，锂离子迁移数提升至0.539，电化学稳定窗口拓宽至4.98 V。基于该电解质组装的固态锂离子电池表现出优异的电化学循环稳定性与实际应用潜力。
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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