利用电荷自洽离散变分Xα方法计算Al、Mg合金化对VH2电子结构的影响.研究表明:在VH中加入金属Al以后,H原子的净电荷都减少,V原子的部分净电荷增加部分净电荷减少.v-H键间既有离子性相互作用,又有共价性相互作用;V-H键之间的相互作用减弱,氢容易被释放出来,从而改善了吸放氢性能;Al和Mg合金化以后,V和H原子的净电荷都减少,V-H键间的共价性相互作用增强;V-H键间的相互作用增加,有利于增加贮氢量,不利于改善吸放氢性能.
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