纤维素微孔锂电隔膜的制备及性能研究
发布时间：2018-09-08 07:32
【摘要】：为改善锂电隔膜的亲液性和耐高温性,以醋酸纤维素为成膜材料,利用相转化法制备了新型锂电隔膜,通过形貌和孔道结构表征、亲液性能和耐热性能测试对醋酸纤维素隔膜的基本性能进行研究,并将该隔膜装配成锂离子电池进行充放电性能测试.结果表明,醋酸纤维素隔膜具有均匀的微孔结构,孔隙率达到65%,约为传统聚烯烃隔膜的1.5倍;纤维素材料的良好亲液性和高孔隙率结构改善了隔膜的吸液性能,其吸液率达到285%;该隔膜在150oC、30 min的热处理条件下未发生明显的热收缩.鉴于上述优点,相对于市售PE隔膜,醋酸纤维素隔膜所装配锂离子电池显示出更优的循环性能和倍率性能.
[Abstract]:In order to improve the hydrophilicity and high temperature resistance of lithium electric separator, a novel lithium electric separator was prepared by phase inversion method with cellulose acetate as membrane material, and characterized by morphology and pore structure. The basic properties of cellulose acetate membrane were studied by hydrophilic and heat resistance tests. The membrane was assembled into a lithium ion battery to test its charge-discharge performance. The results showed that cellulose acetate membrane had a uniform micropore structure with a porosity of 65, about 1.5 times of that of the traditional polyolefin membrane, and the good hydrophilic property and high porosity structure of cellulose improved the liquid absorption performance of the membrane. The absorbency of the film reached 285, and the membrane did not show obvious thermal shrinkage under the heat treatment condition of 150oC ~ (3 +) for 30 min. In view of the above advantages, the lithium-ion batteries fitted with cellulose acetate membranes exhibit better cycling performance and rate performance than commercial PE membranes.
【作者单位】： 山西大同大学煤炭工程学院矿业工程系;
【基金】：大同市科技资助项目(No.201316) 山西省科技资助项目(No.20140321003-05)资助
【分类号】：TM912
本文编号：2229826
[Abstract]:In order to improve the hydrophilicity and high temperature resistance of lithium electric separator, a novel lithium electric separator was prepared by phase inversion method with cellulose acetate as membrane material, and characterized by morphology and pore structure. The basic properties of cellulose acetate membrane were studied by hydrophilic and heat resistance tests. The membrane was assembled into a lithium ion battery to test its charge-discharge performance. The results showed that cellulose acetate membrane had a uniform micropore structure with a porosity of 65, about 1.5 times of that of the traditional polyolefin membrane, and the good hydrophilic property and high porosity structure of cellulose improved the liquid absorption performance of the membrane. The absorbency of the film reached 285, and the membrane did not show obvious thermal shrinkage under the heat treatment condition of 150oC ~ (3 +) for 30 min. In view of the above advantages, the lithium-ion batteries fitted with cellulose acetate membranes exhibit better cycling performance and rate performance than commercial PE membranes.
【作者单位】： 山西大同大学煤炭工程学院矿业工程系;
【基金】：大同市科技资助项目(No.201316) 山西省科技资助项目(No.20140321003-05)资助
【分类号】：TM912
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，本文编号：2229826
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