中国塑料2024，Vol.38Issue(11)：47-52,6.DOI:10.19491/j.issn.1001-9278.2024.11.008
聚酰亚胺/羟乙基纤维素复合纤维膜的制备及其电池性能研究
Preparation and battery performance of polyimide/hydroxyethyl cellulose composite nanofiber membrane
摘要
Abstract
Polyimide(PI)/hydroxyethyl cellulose(HEC)nanofiber composite membranes were prepared via in-situ inte-grated reinforcement modification using HEC as a functional modification material for PI nanofiber membranes.The strength of PI nanofibers membrane was increased due to the bonding and coating of the PI nanofibers with HEC,and the polar functional groups of HEC were uniformly distributed on the surface of PI nanofibers to act as functional sites for real-izing the regulation of lithium-ion flow.The results indicated that the introduction of HEC could endow the PI/HEC membranes with excellent tensile strength of 58.65 MPa,high wettability along with a contact angle of 14.31°,a high ion conductivity of 1.63 mS/cm,and a high lithium-ion transfer number of 0.58.The battery equipped with the PI/HEC composite membranes showed high discharge capacities of 170.1 and 135 mAh/g at 0.1 C and 2 C,respectively,a capacity retention rate of 69.43％after 100 cycles at 1 C,and a Coulomb efficiency of nearly 100％.In addition,the re-sults from the lithium deposition test at 1 mA/cm2 indicated the potential of the battery was lower than 0.23 V after 600 h.The density function theory calculation results indicated that HEC has a higher binding energy for lithium ions,confirming that the functional site of HEC can regulate lithium ions to inhibit lithium dendrites.关键词
聚酰亚胺/羟乙基纤维素/纤维膜/隔膜/锂枝晶Key words
polyimide/hydroxyethyl cellulose/nanofiber membrane/separator/lithium dendrite分类
化学化工引用本文复制引用
胡家嫒,马海坤,孙国华,张怡晴,许佳贺,李巧丽,冯茜茜,徐轩,李新傲,倪天恒,侯连龙..聚酰亚胺/羟乙基纤维素复合纤维膜的制备及其电池性能研究[J].中国塑料,2024,38(11):47-52,6.基金项目
河北省自然科学基金(E2024208003) （E2024208003）
河北省省级科技计划项目(20311201D、21314401D、21374901D、21371201D) （20311201D、21314401D、21374901D、21371201D）
国家级大学生创新创业训练计划项目(202410082017) （202410082017）
