Influence of quenching treatment on structure and electrochemical properties of La15Fe22Ni55Mn5B3 hydrogen storage alloy
WANG Hong- li1， YAN Hui- zhong2,3， WANG Li2,3
（1. Baotou Santoku Battery Material Co. Ltd., Baotou 014030, Nei Mongol,China 2. National Engineering Research Center of RE Metallurgy & Functional Materials, Baotou 014030, Nei Mongol,China 3. Baotou Research Institute of Rare Earths, Baotou 014030,Nei Mongol,China）
Abstract：In order to improve the electrochemical properties of La- Fe- B series hydrogen storage alloys, the La15Fe22Ni55Mn5B3 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.
王宏莉，闫慧忠 ，王利 . 淬火处理对La15Fe22Ni55Mn5B3储氢合金结构和电化学性能的影响[J]. , 2017, 24(5): 27-31.
WANG Hong- li， YAN Hui- zhong， WANG Li,. Influence of quenching treatment on structure and electrochemical properties of La15Fe22Ni55Mn5B3 hydrogen storage alloy. , 2017, 24(5): 27-31.
2017, Vol. 24 
