| Relationship between cooling rate and electrochemical performance of melt-spun AB_5 alloy |
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| 引用本文： | 舒康颖,张书凯,雷永泉,张宏,王启东. Relationship between cooling rate and electrochemical performance of melt-spun AB_5 alloy[J]. 中国有色金属学会会刊, 2003, 13(4) |
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| 作者姓名： | 舒康颖 张书凯 雷永泉 张宏 王启东 |
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| 作者单位： | Department of Materials Science & Engineering，Department of Materials Science & Engineering，Department of Materials Science & Engineering，Energy Science and Technology Department，Department of Materials Science & Engineering Zhejiang University，Hangzhou 310027，China，Energy Science and Technology Department，Shanghai Institute of Microsystems and Information Technology，Chinese Academy of Sciences，Shanghai 200050，China，Ningbo Yunsheng Magnetic Material & Engineering Research Institute，Ningbo Yunsheng Group，Ningbo 315040，China，Zhejiang University，Hangzhou 310027，China，Ningbo Yunsheng Magnetic Material & Engineering Research Institute，Ningbo Yunsheng Group，Ningbo 315040，China，Zhejiang University，Hangzhou 310027，China，Shanghai Institute of Microsystems and Information Technology，Chinese Academy of Sciences，Shanghai 200050，China，Zhejiang University，Hangzhou 310027，China |
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| 基金项目： | Project(863 715 0 0 40060)supportedbytheNationalAdvancedMaterialsCommitteeofChina，Project(5 0 13 10 40 )supportedbytheNationalNaturalScienceFoundationofChina |
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| 摘 要： | 1 INTRODUCTIONNi/MHsecondarybatterieshaverapidlybeendevelopedandgraduallysubstitutedforNi/Cdbatter iesintherecentdecadeduetoitshighspecificenergydensityandhavingnopoisonouselementcadmium .TheactivematerialofnegativeelectrodewidelyusedinNi/MHsecondarybatteriesisAB5 typehydrogenstoragealloynowadays .However ,itisstillneededtoimprovethecomprehensive propertiesofAB5 typehydrogenstoragealloyforprolongingtheservicelifeofNi/MHbatteries .Anormalmethodtoimprovethecomprehensivepropertiesofthe…
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Relationship between cooling rate and electrochemical performance of melt-spun AB5 alloy |
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| SHU Kang ying ,,,ZHANG Shu kai ,,LEI Yong quan ,ZHANG Hong ,WANG Qi dong. Relationship between cooling rate and electrochemical performance of melt-spun AB5 alloy[J]. Transactions of Nonferrous Metals Society of China, 2003, 13(4) |
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| Authors: | SHU Kang ying ZHANG Shu kai LEI Yong quan ZHANG Hong WANG Qi dong |
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| Affiliation: | SHU Kang ying 1,2,3,ZHANG Shu kai 1,3,LEI Yong quan 1,ZHANG Hong 2,WANG Qi dong 1 |
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| Abstract: | The crystal structure and electrochemical properties of Ml(NiCoMnAl)5 alloys prepared by both rapid solidification (melt-spinning) and conventional cast methods were systematically investigated. The results show that the charging/discharging cycle life of rapidly solidified alloy is greatly improved, and the mean capacity attenuation rate of the rapidly solidified alloy is 1-3 times lower than that of the as-cast alloy after 600 cycles. All of the melt-spun alloys have almost the same discharge capacity as the as-cast alloy except for the alloy with the cooling rate of 1.8×105 K/s, which has the largest discharge capacity of 310 mAh/g. The melt-spun alloys need longer activation process than the conventional cast alloy. High rate dischargeability becomes poorer as the cooling rate increases in solidification also. Obviously improved electrochemical properties of the melt-spun alloy are closely related to its fine grain, elimination of secondary phase AlNi3 and uniform composition distribution. |
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| Keywords: | hydrogen storage alloy rapid solidification electrochemical properties |
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