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Electrochemical Properties and Crystal Structure of Rare Earth AB_(3.5)-Type Alloy as Negative Electrode Material in mh-ni battery

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Journal of Rare Earths 2003年第S1期21卷 162-164页

作者：张新波柴玉俊印文雅赵敏寿 Key Laboratory of Rare Earth Chemistry and Physics Changchun Institute of Applied ChemistryChinese Academy of Sciences

The electrochemical characteristics and crystal structure of metal hydride electrode of AB_(3.5)-type alloy was studied. The electrochemical properties of the metal hydride electrode were investigated at room temperature and -30 ℃. The partial substitution of ni by Al element causes an expansion of the lattice cell and increases the specific capacity and rate discharge ability of the alloy.

关键词： metal hydride electrode electrochemical properties mh-ni battery lattice cell rare earths

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Factors Affecting Storage Performance of mh-ni battery

Factors Affecting Storage Performance of MH-Ni battery

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2004年国际稀土研究应用研讨会

作者： Jia Chunming Xu Shaoping Xing ZhiqiangInner Mongolia Rare Earth Ovonic High-Power mh/ni battery Co. Ltd. Baotou 014030

＜正＞The open voltage of batteries showed different status after mh-ni batteries were stored for a period of time. Some batteries with 0 V, 0.9-1.1V, above 1.1 V were chosen to study their corresponding internal resistances, open voltages and capacities, etc. On the basis of battery reaction principle, battery samples were analyzed, and factors caused different storage performance were found out. Therefore, some references on improvement of battery storage performance were provided

关键词： mh-ni battery Storage performance battery performance

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Factors on Storage Performance of mh-ni battery

Factors on Storage Performance of MH-Ni Battery

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2004国际稀土研究与应用研讨会（包头）

作者：张忠贾春明邢志强李俐马逸君 Inner Mongolia Rare Earth Ovonic High-Power mh/ni battery Co. Ltd. Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power mh/ni battery Co. Ltd. Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power mh/ni battery Co. Ltd. Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power mh/ni battery Co. Ltd. Baotou 014030 China Inner Mongolia Rare Earth Ovonic High-Power mh/ni battery Co. Ltd. Baotou 014030 China

＜正＞ The open voltage of batteries shows different status after mh-ni batteries are stored for a period of time. Some batteries with 0, 0.9 - 1.1V and above 1.1 V were chosen to study their corresponding internal resistances, open voltages and the reduction of capacities, etc. On the basis of battery reaction principle, battery samples were analyzed, and factors causing different storage performance were found out. Therefore, some references on the improvement of battery storage performance were provided.

关键词： mh-ni battery storage performance battery performance

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Research of heat treatment of low-Co AB_5 type hydrogen storage alloys for mh-ni batteries

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Rare Metals 2003年第3期22卷 175-178页

作者： GUOJinghong CHENDemin LIUGuozhong YANGKe MAJun InstituteofMetalResearch ChineseAcademyofSciencesSl~nyang110015China Suppobattery(Shenyang)Co. LtdShenyang110015China InstituteofMetalResearch ChineseAcademyofSciencesShenyang110015China Suppobattery(Shenyang)Co. LtdShenyang110015China

The effects of low-Co AB_5 type hydrogen storage alloys prepared by quenchingand annealing on the performances of mh-ni batteries were investigated, and the characteristics ofthe low-Co AB_5 type hydrogen storage alloys were compared with those of the high-Co AB_5 typehydrogen storage alloy as well. The results showed that the faster the cooling of the low-Cohydrogen storage alloy is, the better homogeneity of the chemical composition for the alloy and thelonger cycle life of the battery are, but the electrochemical discharge capacity and high-ratedischarge ability are reduced. The high-rate discharge ability and charge retention of mh-nibatteries for the conventional as-cast annealed low-Co hydrogen storage alloy were superior to thosefor the rapidly quenched low-Co hydrogen storage alloy and the high-Co hydrogen storage alloy, buta little inferior in the cycle life.

关键词： storage energy technology low-Co AB_5type hydrogen storage alloy annealing mh-ni battery

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Effects of Mm（niCoAlMn）5 Hydrogen Storage Alloy Coated withni-Co-P Alloy by Electroless Plating on the Electrochemical Properties of Hydride Electrodes

Effects of Mm（NiCoAlMn）5 Hydrogen Storage Alloy Coated wit...

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第四届国际稀土学术会议

作者： Sun Chunwen1 2 Tang Zhiyuan2 Guo Hetong2 Hu Wanqi1 1 Institute of Chemical Metallurgy Chinese Academy of Sciences Beijing 100080 China 2 Chemical Engineering School Tianjin University Tianjin 300072 China

＜正＞ The effect of chemical plating with ni-Co-P alloy on the properties of mh electrodes is investigated. The results show that the efficiency of storage alloy and the activation of mh electrode have been improved by introducing 1.74 percent cobalt in the ni-Co-P alloy coating. The initial discharge capacity is 208mAh.g-1. The maximum discharge capacity gets to 298. 5mAh.g-1. At the same time the cycle life of mh electrodes is improved. The discharge capacity of mh electrodes coated with ni-Co-P is 88 percent of the maximum discharge capacity after 300 cycles. Whereas the discharge capacity of bare alloy electrodes retains 62 percent of the maximum capacity after 300 cycles. An increment of discharge capacity is mainly due to su-perposition of the oxidation current of Co as well as improved efficiency of microcurrent collection. The effect of ni-Co-P alloy coating by electroless plating on the kinetic properties of hydride electrode has been systematically investigated by electrochem-ical techniques. The results indicated that the kinetic properties of mh electrode, including exchange current density i0`limiting current density iL have been improved markedly. This improvement of kinetic properties led to the decrease of overpotential of anodic and cathodic polarization.

关键词： rare earths rare earths based hydrogen-storage alloys electroless ni-Co-P alloy plating mh-ni battery

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mh-ni电池新型低温负极材料研究

MH-Ni电池新型低温负极材料研究

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第三届全国氢能学术会议

作者：赵敏寿孙长英吴耀明中国科学院长春应用化学研究所稀土化学和物理开放实验室

常规方法合成的非AB型镍-稀土金属间化合物不是单相化合物,都是多相混合物,而作为高容量的mh-ni电池负极材料,多相混合物是有益的.对非AB型的镍-稀土金属间化合物作为mh-ni电池负极进行了电化学性能研究,结果表明:室温下最大放电容量为2... 详细信息

常规方法合成的非AB型镍-稀土金属间化合物不是单相化合物,都是多相混合物,而作为高容量的mh-ni电池负极材料,多相混合物是有益的.对非AB型的镍-稀土金属间化合物作为mh-ni电池负极进行了电化学性能研究,结果表明:室温下最大放电容量为298mAh/g,经46次循环,容量保持基本不变;在-25C以下至-40C,其放电容量远高于AB型的合金.虽然负极的放电容量都是随温度降低和放电电流的增大而降低,但即使在-40C,I=145 mA/g的高电流下,非AB型镍-稀土金属间化合物的放电容量仍达到158 mAh/g,而AB型的放电容量只有8.8mAh/g.提出合成低温负极材料的3条经验原则.

关键词： Negative electrode material Electrochemistry mh-ni battery

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