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Preliminary Research on High Performance Battery Separator of Alkaline-manganese Battery

Author: ZhangWenNa
Tutor: LiangYun
School: South China University of Technology
Course: Pulp and Paper Engineering
Keywords: Alkaline manganese battery separator paper PVA fibers Viscose fiber Mercerized of pulp
CLC: TM911.14
Type: Master's thesis
Year: 2010
Downloads: 206
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Abstract

With the continuous improvement of people's living standards and scientific and technological progress, various battery products in different fields widely. In recent years, China Battery Industry in vigorously promoting the battery performance, pollution-free, pollution-free process. The alkaline manganese batteries for its large capacity, high performance, environmentally friendly, resource utilization, higher superiority gradually become ordinary zinc-manganese battery replacements. Diaphragm affect battery performance as an important factor, high-performance separator paper research and production is particularly important. Current domestic alkaline manganese battery separator paper is mainly dependent on imports, although the domestic research institutions and companies have developed them and eventually put into production, but its application performance is still a certain gap between the diaphragm and the imports can not occupy the market. This thesis focuses on state-owned alkaline manganese battery separator application performance differences with foreign products on the alkaline manganese battery separator and its raw materials evaluation and feasibility analysis for alkaline manganese battery separator development and production to provide the basis for application support. The main contents include the following parts: first, the major brands at home and abroad to analyze alkaline manganese battery separator from paper materials, structures, and other aspects of performance comparison be evaluated on the domestic market, the major brand batteries of different models separator used to analyze, summarize the current application of alkaline manganese battery separator trend analysis of domestic differences between the diaphragm and problems. Analysis indicates that the current for alkaline manganese batteries are basically produced by the wet paper making method of wet nonwoven fabric (paper) as a separator, the separator base paper with PVA fibers and cellulose fibers in one or more in different proportions with copy together; separator paper made quantitative in 38g / m ~ 2 about the import separator paper 35 ~ 36 g / m ~ 2, the thickness in addition to NKK 110μm, the other are controlled at about 100μm. The diaphragm structure, domestic divide evenness of paper is poor, the pore size of the domestic separator paper separator paper slightly larger than imports in general, a large proportion of relatively large diameter. Separator paper soaked in lye distortion will occur after the fiber, plant fiber of mercerizing may occur, resulting in membrane structure changes, which may affect the battery life. Domestic diaphragm diaphragm than imports more likely to occur in lye structural changes. Most alkaline manganese batteries will choose different depending on the model separator paper. Second, the existing PVA fibers and viscose fiber product stability, evaluated, and preferably for the preparation of the alkaline manganese battery separator materials. The results showed that imports of PVA fiber dispersion of papermaking fibers is superior to domestic, domestic PVA fibers with the same specifications of the imported fiber morphology compared to slightly flat, caused by cutting domestic fiber fiber bundles exist serious problems to be solved; import and domestic water-soluble PVA fibers with different water soluble temperature process, the actual production should refer to their sensitivity to temperature development process; viscose fibers have good dispersion of papermaking. Third, the mercerized pulp beating degree of optimization, depending on the number of revolutions mercerized pulp beating the sub-wire broom degree of performance of the separator, the separator adapted to make the best degree of beating should be controlled PFI 2000 rpm or less; for not a beating degree of freeness, optical microscopy characterization of fibers in a low degree of beating of the pulp, freeze-dried using a method can be visually observed by SEM performance of fiber in the case of wire broom.

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CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Chemical power sources,batteries, fuel cells > Primary batteries,battery > Alkaline batteries
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