An investigation on Pb-Ca-Sn alloys has been performed in order to choose suitable grid alloys materials for spirally wound lead-acid batteries. The electrochemical performances of alloys were characterized by electro...An investigation on Pb-Ca-Sn alloys has been performed in order to choose suitable grid alloys materials for spirally wound lead-acid batteries. The electrochemical performances of alloys were characterized by electrochemical corrosion experiment, SEM, EIS and Cyclic voltammetry test. The results indicate that alloys have different electrochemical performance due to the difference in components. They also have different corrosion resistance. The secondary phase formation could be avoided by adjusting the ratio of the component elements. So choosing a suitable ratio of elements is beneficial to corrosion resistance. The Pb-Ca-Sn-Bi-Cu alloy can be rolled to lead foil for use in thin grid of spirally wound lead-acid batteries with good electrochemical performance. The cycle life test showed good battery performance for this kind of batteries.展开更多
以99.99%高纯铝板为阳极原料,采用电化学方法制备氧化铝前体氢氧化铝,讨论分析了氢氧化铝的焙烧温度、保温时间对制备高纯超细氧化铝的影响,考察了不同电流密度放电对氧化铝形貌和粒度的影响。结果表明:在70 m A·cm^(-2)的较高电...以99.99%高纯铝板为阳极原料,采用电化学方法制备氧化铝前体氢氧化铝,讨论分析了氢氧化铝的焙烧温度、保温时间对制备高纯超细氧化铝的影响,考察了不同电流密度放电对氧化铝形貌和粒度的影响。结果表明:在70 m A·cm^(-2)的较高电流密度下铝/空气电池放电过程可得到平均粒度为268 nm的氢氧化铝;制备的氢氧化铝经洗涤,在1400℃焙烧,保温3 h,可得到平均粒度为200 nm,形貌为近似球状的99.99%的超细氧化铝粉体;而低电流密度所得氧化铝颗粒团聚严重。主要原因是高电流密度使放电过程中产生的氢氧化铝晶体的介稳区宽度变窄所致。展开更多
镁/海水电池是一种高比能量、安全、低成本的水下电源,在该电池中氢析出电极具有重要的作用。采用氢气气泡模板法在泡沫镍基底上电化学沉积得到多孔镍,然后通过化学沉积法修饰微量铂(<25μg/cm2)制备出高效的多孔氢析出电极,并将其...镁/海水电池是一种高比能量、安全、低成本的水下电源,在该电池中氢析出电极具有重要的作用。采用氢气气泡模板法在泡沫镍基底上电化学沉积得到多孔镍,然后通过化学沉积法修饰微量铂(<25μg/cm2)制备出高效的多孔氢析出电极,并将其用作镁/海水电池阴极。通过SEM、EDS、电化学等表征方法分析了阴极的微观形貌、组成及电池的放电性能和性能衰减原因。结果表明:所制备的阴极含有丰富的纳米孔道结构,具有稳定的析氢性能;采用该阴极的镁/海水电池在1 m A/cm2并持续放电240 h的条件下,质量比能量高达801 Wh/kg。展开更多
文摘An investigation on Pb-Ca-Sn alloys has been performed in order to choose suitable grid alloys materials for spirally wound lead-acid batteries. The electrochemical performances of alloys were characterized by electrochemical corrosion experiment, SEM, EIS and Cyclic voltammetry test. The results indicate that alloys have different electrochemical performance due to the difference in components. They also have different corrosion resistance. The secondary phase formation could be avoided by adjusting the ratio of the component elements. So choosing a suitable ratio of elements is beneficial to corrosion resistance. The Pb-Ca-Sn-Bi-Cu alloy can be rolled to lead foil for use in thin grid of spirally wound lead-acid batteries with good electrochemical performance. The cycle life test showed good battery performance for this kind of batteries.
基金supported by the National Key Research and Development Program(2017YFC0306403)the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA09030104,XDA22010601)the Youth Innovation Promotion Association of the Chinese Academy of Sciences~~
文摘镁/海水电池是一种高比能量、安全、低成本的水下电源,在该电池中氢析出电极具有重要的作用。采用氢气气泡模板法在泡沫镍基底上电化学沉积得到多孔镍,然后通过化学沉积法修饰微量铂(<25μg/cm2)制备出高效的多孔氢析出电极,并将其用作镁/海水电池阴极。通过SEM、EDS、电化学等表征方法分析了阴极的微观形貌、组成及电池的放电性能和性能衰减原因。结果表明:所制备的阴极含有丰富的纳米孔道结构,具有稳定的析氢性能;采用该阴极的镁/海水电池在1 m A/cm2并持续放电240 h的条件下,质量比能量高达801 Wh/kg。