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1含铁、钴、镍的钒氧化物二次锂电池正极材料显示文摘对添有不同摩尔比的Fe_2O_3、NiO、Co_2O_3的V_2O_5二次锂电池正极材料的研究表明:5%Fe_2O_3-V_2O_5的比容量最高(334Ah/kg,i_d=0.5mA/cm^2);20%NiO—V_2O_5循环性能最好,经过60次深循环后还保持70%的容量;由Ip~v^(1/2)的线性关系和恒电位阶跃时I~t^(1/2)呈线性关系说明放电过程由锂在正极材料中的扩散所控制.华寿南 钟国伦 崔月芝 1994电源技术1994,18,5:6
2Chiroptical properties of artemisinin and artemether investigated using time-dependent density functional theory显示文摘Chiroptical properties including electronic circular dichroism(ECD) and optical rotatory dispersion(ORD) of artemisinin and artemether have been fully studied using quantum-chemical calculation based on time-dependent density functional theory.Both theoretical ECD and ORD of these two compounds were in good match with the experimental data.ECD spectrum of artemether could be totally attributed to the peroxide group,and that of artemisinin was an overlay of contribution from δ-lactone and peroxide moieties,which leading to a positive maximum at 260 nm.Our results showed that peroxide group could produce a broad ECD band in the far-UV region originated from electron transitions of HOMO →LUMO,HOMO-1 →LUMO and HOMO-2 →LUMO in the case of artemether.This work provided a theoretical interpretation of the ECD behavior of peroxide bond.Li Li Bei-Bei Yang Yi-Kang Si 2014Chinese Chemical Letters2014,25,12:3
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