Nano-alumina@cellulose-coated separators with the reinforcedconcrete-like structure for high-safety lithium-ion batteries

作     者：Zhihao Yang Li Chen Jian Xue Miaomiao Su Fangdan Zhang Liangxin Ding Suqing Wang Haihui Wang Zhihao Yang;Li Chen;Jian Xue;Miaomiao Su;Fangdan Zhang;Liangxin Ding;Suqing Wang;Haihui Wang

作者机构：Guangdong Provincial Key Lab of Green Chemical Product TechnologySchool of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640China Beijing Key Laboratory of Membrane Materials and EngineeringDepartment of Chemical EngineeringTsinghua UniversityBeijing 100084China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2024年第68卷第4期

页      面：83-93页

核心收录：

学科分类：0808[工学-电气工程] 0817[工学-化学工程与技术] 08[工学] 

基　　金：funding from the Natural Science Foundation of China(22278150,22075086,22138005,and 22141001) the Guangdong Basic and Applied Basic Research Foundation(2022A1515010980,2023A1515010046) the Fundamental Research Funds for the Central Universities(2022ZYGXZR101) 

主　　题：Alumina Nanomaterials Lithium-ion batteries Membranes Cellulose Reinforced-concrete-like structure 

摘      要：Separators play a critical role in the safety and performance of lithium-ion ***,commercial polyolefin separators are limited by their poor affinity with electrolytes and low melting *** this work,we constructed a reinforced-concrete-like structure by homogeneously dispersing nano-Al_(2)O_(3) and cellulose on the separators to improve their stability and *** this reinforcedconcrete-like structure,the cellulose is a reinforcing mesh,and the nano-Al_(2)O_(3) acts as concrete to support the *** constructing the reinforced-concrete-like structure,the separators exhibit good stability even at 200℃(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°).Combining these advantages,the cells with nano-Al_(2)O_(3)@cellulose-coated separators exhibit stable cycling performance and good rate ***,the construction of the reinforced-concretelike structure is a promising technology to promote the application of lithium-ion batteries in extreme environments.