摘要
为了改善La-Fe-B系储氢电极合金的电化学性能,对熔炼-快淬工艺制备的La_(15)Fe_(22)Ni_(55)Mn_5B_3储氢合金在一定温度(1 173K,1 373K)下保温后,在水中进行淬火处理。采用XRD,SEM,EDS及电化学方法研究了不同温度下淬火对合金结构和性能的影响。结果表明:淬火处理对合金的相组成有明显影响,放氢P-C-T平台压降低,合金电极的活化能力提高,最大放电容量增加,高倍率放电能力(HRD)得到改善,循环稳定性略有降低。
In order to improve the electrochemical properties of La-Fe-B series hydrogen storage alloys,the La（15）Fe（22）Ni（55）Mn5B3 hydrogen storage alloy was prepared by melting and rapid quenching followed by different quenching treatments（1 173 K,1 373 K）in the water.Alloy structure and electrochemical properties of different quenching alloys have been studied systematically by X-ray diffraction（XRD）,scanning electron microscope（SEM）linked with an energy-dispersive X-ray spectrometer（EDS）and electrochemical experiments.Alloy structure analyses show that the quenching treatment markedly influenced the phase composition of the alloy.Electrochemical experiments show that the desorption plateau became lower after quenching treatment,the alloy electrodes exhibited good activation characteristics,that quenching treatment improved discharge capacity of alloy electrodes.At the same time,high rate discharge（HRD）of alloy electrodes was also improved.However,cycling stability was slightly deteriorated after quenching treatment.
作者
王宏莉
闫慧忠
王利
WANG Hong-li YAN Hui-zhong WANG Li(Baotou Santoku Battery Material Co. Ltd. , Baotou 014030, Nei Mongol,China National Engineering Research Center of RE Metallurgy Functional Materials, Baotou 014030, Nei Mongol,China Baotou Research Institute of Rare Earths, Baotou 014030,Nei Mongol,China)
出处
《金属功能材料》
CAS
2017年第5期27-31,共5页
Metallic Functional Materials
基金
国家自然科学基金地区科学基金项目资助(51061001)
国家国际科技合作项目资助(2010DFB63510)
科技型中小企业技术创新基金无偿资助项目资助(09C26211503168)
内蒙古科技创新引导奖励资金项目资助
关键词
储氢合金
淬火处理
相结构
电化学性能
镍氢电池
hydrogen storage alloy
quenching treatment
phase structure
electrochemical properties
Ni/MH battery
