共查询到18条相似文献,搜索用时 875 毫秒
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金属氢化物-镍电池用隔膜的研究进展 总被引:5,自引:0,他引:5
评述了尼龙纤维、丙纶纤维和维纶纤维等氢镍电池用隔膜的性能.对这些聚合物进行改性处理,可以改善隔膜的亲水性和吸碱能力,从而提高隔膜的性能.具有OH-交换功能的聚合物隔膜可以将电解液完全吸附于其中,使电解液中的氢氧根只能在隔膜中自由移动,同时阻止电池正、负极金属离子向对方的迁移,从而有效降低电池自放电及延长电池循环寿命.指出聚合物隔膜将成为未来隔膜的研究重点,其中选择合适的骨架材料,探索合适的接枝条件,提高聚合物链段的运动能力是今后的研究方向. 相似文献
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通过高压静电纺丝技术,以异丙醇/水为混合溶剂,通过TiO2共混改性,制备了不同二氧化钛含量的聚乙烯-乙烯醇(EVOH)/二氧化钛(TiO2)非织造布,通过扫描电子显微镜、X-射线衍射(XRD)对其微观形貌、结晶性能进行了研究,并分析了相对面电阻和吸碱率与TiO2共混量的关系。结果表明:经TiO2共混改性后,纤维中有白色团状突起出现,有实心纤维和空心纤维两种形貌;XRD分析表明,随着TiO2含量的增加,EVOH/TiO2非织造布的结晶度越来越低;非织造隔膜的吸碱率最大可达到950%。 相似文献
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选择聚乙烯醇水溶性纤维(PVAF)作为增强剂,研究了其不同添加量对锌银电池用辅助隔膜性能的影响.实验结果表明,隔膜的干、湿强度和撕裂度随PVAF添加量的增加而提高,当PVAF添加量大于7%以后,隔膜撕裂度的增加趋势变缓.隔膜的吸碱速度随PVAF添加量的增加而有所下降,但下降幅度较小.当PVAF添加量小于5%时,辅助隔膜... 相似文献
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利用低温等离子体技术对碱性电池隔膜用丙纶非织造布进行表面改性处理,探讨了影响电池隔膜性能的因素,利用红外光谱、扫描电镜对材料表面性能进行了表征分析。结果表明,不同气体的等离子体对丙纶非织造布进行表面处理的最佳工作参数放电气体、放电功率、放电时间、工作压强分别为:氩气,70 W,3 min,15 Pa;氧气,120 W,3 min,30 Pa;空气,100 W,3 min,50 Pa。通过等离子体表面活化处理,在丙纶表面引入了亲水性基团,同时产生了刻蚀,丙纶非织造布的吸碱速率可提高至每10 min 8 cm左右,吸碱率提高至250%,面电阻大幅降低至8 Ω/cm2左右。 相似文献
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湿法、熔喷法非织造布是锂离子电池隔膜的重要材料。简要阐述了用于电池隔膜的非织造布材料的技术特征,并着重介绍了聚合物纳米纤维、原纤化纳米纤维以及高性能纤维材料在电池隔膜材料中的研究及应用现状。 相似文献
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分析潍坊亚星化学股份有限公司隔膜法电解槽运行数据,发现新电解槽淡碱浓度偏低。指出隔膜致密性的影响因素有隔膜厚度、石棉绒长度和隔膜的紧密性。改进吸附工艺,苛化时间由5 m in延长到7 m in,干吸时间由4 h延长至6 h。改进后淡碱质量浓度平均升高13 g/L,达到不低于90 g/L。 相似文献
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碱性锌锰电池因其较高的性价比优势而在全球原电池产业中呈现强劲的增长走势,防漏性是其最主要的质量指标之一。碱性电池的密封质量和许多因素有关,除了被粘接件的表面处理外,主要与所用胶粘剂有关。胶粘剂必须具有优异的耐碱性能及牢固的粘接性能。此外还介绍了碱性电池封口剂的性能、类型及发展趋势,指出常温半流体型软封口剂将是今后碱性电池封口剂的发展方向。 相似文献
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采用水热法制备ZrO2空心微球作为隔热填料,以萘改性的耐热酚醛环氧树脂为基体,制备了4种不同ZrO2含量的热电池隔热涂层,表征了其性能. 结果表明,所制ZrO2为直径约500 nm的空心球,表面粗糙;酚醛环氧树脂的热分解温度约为370℃,适宜的ZrO2空心球添加量为50%~60%(w). ZrO2含量为50%(w)时,室温下隔热涂层结合强度为21.6 MPa,剪切强度为11.4 MPa,热导率为0.05 W/(m×K);300℃下隔热涂层剪切强度为3.1 MPa,热导率为0.04 W/(m×K). 相似文献
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《Journal of the European Ceramic Society》2020,40(5):2056-2062
Highly porous zirconia ceramics for prospective use as separators in alkaline electrolysis cells have been processed by emulsification of paraffin in concentrated zirconia suspensions. Effects of processing parameters on porosity, cell size distribution, and pore interconnectivity are studied through Taguchi statistical design. The porosity of zirconia ceramics has shown a strong correlation with paraffin-to-suspension ratio employed in emulsification. High paraffin-to-suspension ratios combined with high gelatin content in the emulsion are beneficial for creating highly porous cellular materials with interconnected cell sizes. The attained microstructural features allow high percolation of ionic species in these highly porous ceramics after impregnation with aqueous electrolytes, facilitating charge transport within the liquid medium inside the ceramic bodies, as required for lower ohmic losses. This work provides guidelines for developing efficient ceramic separators for future use in alkaline electrolysis cells and other applications requiring thermally and chemically-stable ceramics with high and well-interconnected porosity. 相似文献
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M. Yano S. Fujitani K. Nishio Y. Akai M. Kurimura 《Journal of Applied Electrochemistry》1998,28(11):1221-1225
The amount and distribution of additive species in zinc alloy particles containing 0.025wt% bismuth modified with 0.10wt% indium for mercury-free alkaline manganese batteries were examined after storage at various discharging levels at 60°C. The amount of hydrogen gas evolution due to the self-discharging reactions of zinc and the internal cell impedance were also evaluated. The amount of additive species in the zinc alloy particles was found to increase with increasing depth of discharge. Indium was homogeneously distributed on the surface even after partial discharge and also after storage for 1200h at 60°C. This behaviour is considered to contribute to the suppression of hydrogen gas evolution and increase in the internal cell impedance to the same level as when mercury is employed. As a result, mercury-free alkaline manganese batteries showed the same storage characteristics as conventional batteries containing mercury. 相似文献