材料科学
聚烯烃
分离器(采油)
极限抗拉强度
纤维素
复合材料
热稳定性
电解质
锂(药物)
纳米-
化学工程
化学
图层(电子)
医学
工程类
内分泌学
物理
电极
物理化学
热力学
作者
Zhihao Yang,Li Chen,Jian Xue,Miaomiao Su,Fangdan Zhang,Liang‐Xin Ding,Suqing Wang,Haihui Wang
标识
DOI:10.1016/j.cjche.2023.07.015
摘要
Separators play a critical role in the safety and performance of lithium-ion batteries. However, commercial polyolefin separators are limited by their poor affinity with electrolytes and low melting points. In this work, we constructed a reinforced concrete-like structure by homogeneously dispersing nano-Al2O3 and cellulose on the separators to improve their stability and performance. In this reinforced concrete-like structure, the cellulose is a reinforcing mesh, and the nano-Al2O3 acts as concrete to support the separator. After constructing the reinforced concrete-like structure, the separators exhibit good stability even at 200 oC (thermal shrinkage of 0.3%), enhanced tensile strain (tensile stress of 133.4 MPa and tensile strains of 62%) and better electrolyte wettability (a contact angle of 6.5 o). Combining these advantages, the cells with nano-Al2O3@cellulose coated separators exhibit stable cycling performance and good rate performance. Therefore, the construction of the reinforced concrete-like structure is a promising technology to promote the application of lithium-ion batteries in extreme environments.
科研通智能强力驱动
Strongly Powered by AbleSci AI