期刊
JOURNAL OF POWER SOURCES
卷 315, 期 -, 页码 161-168出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2016.03.037
关键词
Aqueous; Ceramic coating; Aluminum hydroxide; Polyolefin-based microporous separators; Lithium-ion batteries
资金
- Ministry of Education, Science and Technology (MEST)
- National Research Foundation (NRF) of Korea through the Human Resource Training Project for Regional Innovation [2014066977]
- IT R&D program of MOTIE/KEIT [10046314]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10046314] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
To develop an environmentally friendly and cost-effective water-based inorganic coating process for hydrophobic, polyolefin-based microporous separators, the effect of surfactants in an aqueous inorganic coating solution comprising alumina (Al2O3) on polyethylene (PE)-based microporous separators is investigated. By using a selected surfactant, i.e., disodium laureth sulfosuccinate (DLSS), the aqueous Al2O3 coating solution maintained a dispersed state over time and facilitated the formation of a uniform Al2O3 coating layer on PE separator surfaces. Due to the hydrophilic nature of the Al2O3 coating layers, the as-prepared, ceramic-coated PE separators had better wetting properties, greater electrolyte uptake, and larger ionic conductivities compared to those of the bare PE separators. Furthermore, half cells (LiMn2O4/Li metal) containing Al2O3-coated PE separators showed improved capacity retention over several cycles (93.6% retention after 400 cycles for Al2O3 coated PE separators, compared to 89.2% for bare PE separators operated at C/2) and rate capability compared to those containing bare PE separators. Moreover, because the Al2O3-coated layers are more thermally stable, the coated separators had improved dimensional stability at high temperatures (140 degrees C). (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据