Constructure Of Super-entropy Change Tife Alloy And Their Application In Battery

At present, hydrogen storage alloy LaNis were used as the main cathode materials in the MH-Ni battery is very expensive, so this paper designs and prepares a kind of cheap hydrogen storage TiFe alloy which has super entropy changes. In order to improve hydrogen storage property of TiFe alloy, we use the LiCl-KCl mix salt as raw material which is electrolytic cathode made by TiFe alloy, and we prepare for super entropy hydrogen storage TiFe alloy by using electro-deposition and diffusion the metal Li, we also make negative electrode of MH-Ni batteries, and produce simulated cell in the laboratory.The experiment are characterized some electrochemical properties of simulated battery, such as the maximum stable discharge capacity, cycling stability, charging conservation rate, charge-discharge rate, discharging at low temperature and charge-discharge at high temperature. The result shows that the property of ultra entropy TiFe alloy is obviously superior the blank TiFe alloy. When the cell voltage of3.8V and electrolyze30minutes, we will get best performance sample. Maximum stable discharge capacity increased30%than the blank sample; charge-discharge ratio performance improved; discharge efficiency of3C is55.4%, higher than the blank cell36.2%; discharge of3C efficiency is68%when it’s charged, higher than the blank cell53%; in cycling stability, capacity retention rate was88.2%higher than24.6%of the blank cell after100circulations, but charge retention ability of battery is deteriorative.