Well-crystallized MgFeSiO4 microparticles were synthesized at different temperatures by a simple molten salt method using KCl flux. As a new cathode for rechargeable magnesium batteries,the material shows a reversible...Well-crystallized MgFeSiO4 microparticles were synthesized at different temperatures by a simple molten salt method using KCl flux. As a new cathode for rechargeable magnesium batteries,the material shows a reversible Mg2+ intercalation-deintercalation process. In 0.25 mol/L Mg(AlCl2EtBu) 2/THF electrolyte,MgFeSiO4 synthesized at 900°C can deliver a 125.1 mAh/g initial dis-charge capacity and a 91.4% capacity retention on the 20th cycle at a rate of 0.1C(about 15.6 mA/g) . The results show that MgFeSiO4 could be a good host for Mg2+ intercalation,and a potential cathode material for high-energy rechargeable magnesium batteries.展开更多
利用碳球作为模板,通过与异丙醇氧钒的溶剂热反应制备了五氧化二钒(V_2O_5)空心球。采用扫描电子显微镜(SEM)和透射电子显微镜(TEM)等技术手段对V_2O_5空心球进行了表征。实验结果表明,V_2O_5空心球的直径约为1.5μm,壁厚约100 nm。将V_...利用碳球作为模板,通过与异丙醇氧钒的溶剂热反应制备了五氧化二钒(V_2O_5)空心球。采用扫描电子显微镜(SEM)和透射电子显微镜(TEM)等技术手段对V_2O_5空心球进行了表征。实验结果表明,V_2O_5空心球的直径约为1.5μm,壁厚约100 nm。将V_2O_5空心球作为镁二次电池的正极,在0.2 C充放电条件下,材料的首次放电比容量达140 m A·h/g,经20次循环后容量为110 m A·h/g。展开更多
基金supported by the National Natural Science Foundation of China (20603022,20973112)the National Basic Research Program of China (2007CB209700)
文摘Well-crystallized MgFeSiO4 microparticles were synthesized at different temperatures by a simple molten salt method using KCl flux. As a new cathode for rechargeable magnesium batteries,the material shows a reversible Mg2+ intercalation-deintercalation process. In 0.25 mol/L Mg(AlCl2EtBu) 2/THF electrolyte,MgFeSiO4 synthesized at 900°C can deliver a 125.1 mAh/g initial dis-charge capacity and a 91.4% capacity retention on the 20th cycle at a rate of 0.1C(about 15.6 mA/g) . The results show that MgFeSiO4 could be a good host for Mg2+ intercalation,and a potential cathode material for high-energy rechargeable magnesium batteries.
文摘利用碳球作为模板,通过与异丙醇氧钒的溶剂热反应制备了五氧化二钒(V_2O_5)空心球。采用扫描电子显微镜(SEM)和透射电子显微镜(TEM)等技术手段对V_2O_5空心球进行了表征。实验结果表明,V_2O_5空心球的直径约为1.5μm,壁厚约100 nm。将V_2O_5空心球作为镁二次电池的正极,在0.2 C充放电条件下,材料的首次放电比容量达140 m A·h/g,经20次循环后容量为110 m A·h/g。
