Control of Mg-Based Hydrogen Storage Alloy Nanocrystallites and Their Surface Modification

在本研究中获得的结果三年后，它被总结为后续。XPS和拉曼光谱显示了用π电子从图形中转移到氧化表面Mg的球形铣削削弱了Mg-O键强度，导致Ni-O键的形成。金属镍与镁在MgNi表面上的比率是由球磨坊增加的。Mg-D22-D2 Ni-70重量%的氢吸收率Ni composite at 30℃ markedly increased in comparison with Mg D22 Ni and Mg D22 Ni-70 wt.%混合物和吸收氢在1小时内达到约1小时的H/M的数量。在电荷释放试验中，Mg-D22-D2 Ni-70重量% Ni composite showed markedly high discharge capacity of about 870 mAh g（Mg D22-D2Ni）discharge capacity， moreover， increased up to 1080 mAh g（Mg D22-D2Ni）y D1 by using Ni powder with the weight ratio of Ni to alloy of 10 instead of Cu powder。充电-充电循环性能得到了改善，增加了添加镍粉的数量。MgNi D20.9 YE D2 M YE D20.1 YE D2 Ni（M=Ti， V）合金在与MgNi比较时得到了很大改进，而初始释放容量减少了。这是对Mg-D20. 9 Y-D2 V Y-D20. 1 Y-D2 Ni合金和在合金表面上形成Ti氧化物的形成在Mg-D20. 9 Y-D2 Ti合金。In addition， Mg ― D20.9 Mg ― D2Ti ― D2x Mg ― D2V Mg ― D20.1-x Mg ― D2Ni alloy showed cycle performance superior to the Mg ― D20.9 Mg ― D2M ― D20.1 Mg ― D2Ni （M=ti， v） alloys due to the synegret effect of V and Ti components。

The results obtained in this study for three years are summarized as follows.1. XPS and Raman spectroscopy showed that electron transfer from graphite with π electrons to the oxidized surface Mg by ball-milling weakened the Mg-O bond strength, leading to the formation of the Ni-O bonding. The ratio of metallic Ni to Mg on the MgNi surface was increased by the ball-milling.2. The rate of hydrogen absorption for MgィイD22ィエD2Ni-70 wt.% Ni composite at 30℃ markedly increased in comparison with MgィイD22ィエD2Ni and MgィイD22ィエD2Ni-70 wt.% mixture and the amount of absorbed hydrogen reached H/M of about one within 1 h. In the charge-discharg test, the MgィイD22ィエD2Ni-70 wt.% Ni composite showed markedly high discharge capacity of about 870 mAh g(MgィイD22ィエD2Ni)ィイD1-1ィエD1. The discharge capacity, moreover, increased up to 1080 mAh g(MgィイD22ィエD2Ni)ィイD1-1ィエD1by using Ni powder with the weight ratio of Ni to alloy of 10 instead of Cu powder. The charge-discharge cycle performance was improved by increasing the amount of added Ni powder.3. The charge-discharge cycle performance for MgィイD20.9ィエD2MィイD20.1ィエD2Ni (M=Ti, V) alloys was greatly improved in comparison with MgNi though the initial discharge capacity decreased. This was ascribed to the preference dissolution of V component in alkaline solution for the MgィイD20.9ィエD2VィイD20.1ィエD2Ni alloy and the formation of Ti oxides on the alloys surface for the MgィイD20.9ィエD2TiィイD20.1ィエD2Ni alloy. In addition, MgィイD20.9ィエD2TiィイD2xィエD2VィイD20.1-xィエD2Ni alloy showed cycle performance superior to the MgィイD20.9ィエD2MィイD20.1ィエD2Ni (M=ti, v) alloys due to the synegret effect of V and Ti components.