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Preparation and properties of composite separators with asymmetric structures for alkaline batteries
Xiao, Wei; Zhao, Lina; Gong, Yaqun; Wang, Hong; Liu, Jianguo; Yan, Chuanwei; wxiao@imr.ac.cn
2015
Source PublicationRSC ADVANCES
ISSN2046-2069
Volume5Issue:67Pages:54742-54748
AbstractA novel asymmetric separator with high electrolyte wettability and chemical stability was developed for alkaline batteries. This separator was fabricated from an electrolyte-absorbing layer (cellulose nonwoven, CN) and an alkali-resistant layer (PVdF-ZrO2 matrix), which were integrated together by a point-bonded method using polyvinyl alcohol fibers as the binder. The characteristic properties of the composite separator have been studied by structural characterization, contact angle testing, weight and dimensional stabilities, electrolyte-absorbing rate, and electrochemical behavior. Results showed that the composite separator had a uniform surface morphology and highly gradient three-dimensional porous structure, which led to a low electrolyte contact angle of 35 degrees and an area electrical resistance of 0.08 Omega cm(2). Moreover, it showed a low weight reduction rate of 7.5% and an area shrinkage rate of 2.0% in 40 wt% KOH solution at 333 K for 120 h. Due to the electrolyte-philic macroporous layer, the composite separator exhibited a high electrolyte-absorbing rate, which was higher than 55 mm for 5 min. These characteristics endowed the composite separator with excellent electrochemical performance, including a short activation time and a long dry/wet storage life. It is demonstrated that the composite separator can be a good candidate for alkaline batteries, especially for self-activated zinc-silver oxide batteries.
description.department[xiao, wei ; zhao, lina ; gong, yaqun ; wang, hong ; liu, jianguo ; yan, chuanwei] chinese acad sci, inst met res, lab corros & protect, beijing 100864, peoples r china
Funding OrganizationNational Science Foundation of China [21306213]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75073
Collection中国科学院金属研究所
Corresponding Authorwxiao@imr.ac.cn
Recommended Citation
GB/T 7714
Xiao, Wei,Zhao, Lina,Gong, Yaqun,et al. Preparation and properties of composite separators with asymmetric structures for alkaline batteries[J]. RSC ADVANCES,2015,5(67):54742-54748.
APA Xiao, Wei.,Zhao, Lina.,Gong, Yaqun.,Wang, Hong.,Liu, Jianguo.,...&wxiao@imr.ac.cn.(2015).Preparation and properties of composite separators with asymmetric structures for alkaline batteries.RSC ADVANCES,5(67),54742-54748.
MLA Xiao, Wei,et al."Preparation and properties of composite separators with asymmetric structures for alkaline batteries".RSC ADVANCES 5.67(2015):54742-54748.
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