title: Porous cellulose diacetate-SiO2 composite coating on polyethylene separator for high-performance lithium-ion battery.
abstract: The developments of high-performance lithium ion battery are eager to the separators with high ionic conductivity and thermal stability. In this work, a new way to adjust the comprehensive properties of inorganic-organic composite separator was investigated. The cellulose diacetate (CDA)-SiO2 composite coating is beneficial for improving the electrolyte wettability and the thermal stability of separators. Interestingly, the pore structure of composite coating can be regulated by the weight ratio of SiO2 precursor tetraethoxysilane (TEOS) in the coating solution. The electronic performance of lithium ion batteries assembled with modified separators are improved compared with the pristine PE separator. When weight ratio of TEOS in the coating solution was 9.4%, the composite separator shows the best comprehensive performance. Compared with the pristine PE separator, its meltdown temperature and the break-elongation at elevated temperature increased. More importantly, the discharge capacity and the capacity retention improved significantly.
authors.affiliation: School of Materials Science and Engineering,Shanghai University, Shanghai 200444, China; Research Centre of Nanoscience and Nanotechnology, Shanghai University, Shanghai 200444, China.
authors.forename: Wenju
authors.initials: W
authors.lastname: Chen
authors.affiliation: Research Centre of Nanoscience and Nanotechnology, Shanghai University, Shanghai 200444, China.
authors.forename: Liyi
authors.initials: L
authors.lastname: Shi
authors.affiliation: Research Centre of Nanoscience and Nanotechnology, Shanghai University, Shanghai 200444, China. Electronic address: bamboo2009@shu.edu.cn.
authors.forename: Zhuyi
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Ångström Advanced Battery Centre, Uppsala University, 75121 Uppsala, Sweden.
authors.forename: Jiefang
authors.initials: J
authors.lastname: Zhu
authors.affiliation: Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
authors.forename: Haijun
authors.initials: H
authors.lastname: Yang
authors.affiliation: Research Centre of Nanoscience and Nanotechnology, Shanghai University, Shanghai 200444, China.
authors.forename: Xufeng
authors.initials: X
authors.lastname: Mao
authors.affiliation: Research Centre of Nanoscience and Nanotechnology, Shanghai University, Shanghai 200444, China.
authors.forename: Mingming
authors.initials: M
authors.lastname: Chi
authors.affiliation: Research Centre of Nanoscience and Nanotechnology, Shanghai University, Shanghai 200444, China.
authors.forename: Lining
authors.initials: L
authors.lastname: Sun
authors.affiliation: Research Centre of Nanoscience and Nanotechnology, Shanghai University, Shanghai 200444, China. Electronic address: s.yuan@shu.edu.cn.
authors.forename: Shuai
authors.initials: S
authors.lastname: Yuan
mesh_terms: D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D011211:Electric Power Supplies / Q000592:standards*; D008094:Lithium; D020959:Polyethylene / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D012822:Silicon Dioxide; D020959:Polyethylene; D002482:Cellulose; C026170:cellulose diacetate; D008094:Lithium
keywords: Inorganic-organic composite coating; Li(+) ion conductivity; Li-dendrites; Lithium ion battery separator; Shutdown temperature