材料科学
合金
球磨机
复合数
电化学
氢气储存
涂层
冶金
复合材料
电极
物理化学
化学
作者
Zhonggang Han,Tingting Zhai,Zeming Yuan,Fuchen Liu,Dong Feng,Hongqi Sun,Yanghuan Zhang
标识
DOI:10.1016/j.mtcomm.2023.105613
摘要
In this paper, Ti1.04Zr0.1La0.06Fe0.6Ni0.3Mn0.2 + x wt% Ni (x = 0, 2, 5, 7, 10) composite were prepared by ball milling for 1 h, and the effects of Ni powder addition on the structure, morphology and electrochemical properties of the alloy were investigated. As the results show that after ball milling for 1 h with Ni powder, the composite consists of TiFe, ZrMn2, and Ni triple phases. With increasing of Ni powder addition, the uniformity of Ni powder coating on the alloy surface is improved, and the discharge capacity, cycling stability and high-rate discharge (HRD) performance of the composite are significantly improved. The first discharge capacity of the x = 10% alloy was as high as 286.9 mAh/g, and the retention rate reaches 77.8% after 50 cycles, which is nearly 90% higher than that of the alloy with x = 0% alloy (38.7%). At a current density of 80 mA/g, the HRD value of the x = 10% alloy (59.4%) was improved by 97.8% compared to that of the non-Ni powder ball milling alloy (30.03%), and the kinetic parameters (D, IL and Rct) showed a trend consistent with the pattern of variation of high-rate discharge performance. The uniform coating of Ni powder with high electrical conductivity and excellent electrocatalytic activity on the alloy surface is a primary factor for the enhanced electrochemical properties of Ni composite.
科研通智能强力驱动
Strongly Powered by AbleSci AI