The structures and electrochemical properties of the Ti1.4V0.6Ni ribbon before and after heat treatment are investigated systematically. The structure of the sample is characterized by X-ray powder diffraction analysi...The structures and electrochemical properties of the Ti1.4V0.6Ni ribbon before and after heat treatment are investigated systematically. The structure of the sample is characterized by X-ray powder diffraction analysis. Electrochemical properties including the discharge capacity, the cyclic stability and the high-rate discharge ability are tested. X-ray powder diffraction analysis shows that after heat treatment at 590 °C for 30 min, all samples mainly consist of the icosahedral quasicrystal phase (I-phase), Ti2Ni phase (FCC), V-based solid solution phase (BCC) and C14 Laves phase (hexagonal). Electrochemical measurements show that the maximum discharge capacity of the alloy electrode after heat treatment is 330.9 mA?h/g under the conditions that the discharge current density is 30 mA/g and the temperature is 30 °C. The result indicates that the cyclic stability and the high-rate discharge ability are all improved. In addition, the electrochemical kinetics of the alloy electrode is also studied by electrochemical impedance spectroscopy (EIS) and hydrogen diffusion coefficient (D).展开更多
以微波消解–ICP–OES法测定难分解不锈钢和中低合金钢中Cr，Ni，Mn，V，Ti，Cu，Mo的含量。样品经6 mL稀王水和0.5 mL HF微波消解处理后，用带有耐HF进样系统的ICP–OES仪测定试样中多种元素。在优化仪器分析参数和消除基体及共存元素...以微波消解–ICP–OES法测定难分解不锈钢和中低合金钢中Cr，Ni，Mn，V，Ti，Cu，Mo的含量。样品经6 mL稀王水和0.5 mL HF微波消解处理后，用带有耐HF进样系统的ICP–OES仪测定试样中多种元素。在优化仪器分析参数和消除基体及共存元素的干扰后，各待测元素的检出限为0.0009%～0.0099%，校准工作曲线的线性相关系数均大于0.999，相对标准偏差为0.27%～1.50%（n=6）。该方法适用于难分解不锈钢和中低合金钢中7种元素含量的日常检测。展开更多
基金Project (20112216120001) supported by the Doctoral Program of Tertiary Education of the Ministry of Education of ChinaProject(21215141) supported by the Natural Science Foundation of Jilin Province, China+3 种基金Project (20921002) supported by the Foundation for Innovative Research Groups of the National Natural Science Foundation of ChinaProjects (21073179, 61106050) supported by the National Natural Science Foundation of ChinaProject (BE2012047) supported by Scientific and Technological Supporting Program of Jiangsu Province of China and GS Yuasa Corporation of JapanProject (11KZ38) supported by and Scientific and Technological Pillar Project of Changchun, China
文摘The structures and electrochemical properties of the Ti1.4V0.6Ni ribbon before and after heat treatment are investigated systematically. The structure of the sample is characterized by X-ray powder diffraction analysis. Electrochemical properties including the discharge capacity, the cyclic stability and the high-rate discharge ability are tested. X-ray powder diffraction analysis shows that after heat treatment at 590 °C for 30 min, all samples mainly consist of the icosahedral quasicrystal phase (I-phase), Ti2Ni phase (FCC), V-based solid solution phase (BCC) and C14 Laves phase (hexagonal). Electrochemical measurements show that the maximum discharge capacity of the alloy electrode after heat treatment is 330.9 mA?h/g under the conditions that the discharge current density is 30 mA/g and the temperature is 30 °C. The result indicates that the cyclic stability and the high-rate discharge ability are all improved. In addition, the electrochemical kinetics of the alloy electrode is also studied by electrochemical impedance spectroscopy (EIS) and hydrogen diffusion coefficient (D).
文摘以微波消解–ICP–OES法测定难分解不锈钢和中低合金钢中Cr，Ni，Mn，V，Ti，Cu，Mo的含量。样品经6 mL稀王水和0.5 mL HF微波消解处理后，用带有耐HF进样系统的ICP–OES仪测定试样中多种元素。在优化仪器分析参数和消除基体及共存元素的干扰后，各待测元素的检出限为0.0009%～0.0099%，校准工作曲线的线性相关系数均大于0.999，相对标准偏差为0.27%～1.50%（n=6）。该方法适用于难分解不锈钢和中低合金钢中7种元素含量的日常检测。
