School of Materials Science & Engineering, Central South University , Changsha 410083, Hunan, China.
State Key Laboratory of Powder Metallurgy, Central South University , Changsha 410083, Hunan, China.
ACS Appl Mater Interfaces. 2016 Jul 13;8(27):17303-11. doi: 10.1021/acsami.6b04866. Epub 2016 Jun 27.
Carbon-based nanocomposites have been extensively studied in energy storage and conversion systems because of their superior electrochemical performance. However, the majority of metal oxides are grown on the surface of carbonaceous material. Herein, we report a different strategy of constructing V2O5 within the metal organic framework derived carbonaceous dodecahedrons. Vanadium precursor is absorbed into the porous dodecahedron-shaped carbon framework first and then in situ converted into V2O5 within the carbonaceous framework in the annealing process in air. As cathode materials for lithium ion batteries, the porous V2O5@C composites exhibit enhanced electrochemical performance, due to the synergistic effect of V2O5 and carbon composite.
碳基纳米复合材料因其优异的电化学性能而在储能和转换系统中得到了广泛的研究。然而，大多数金属氧化物都是在碳质材料的表面生长的。在此，我们报告了一种在金属有机骨架衍生的碳质十二面体内部构建 V2O5 的不同策略。钒前体首先被吸收到多孔的十二面体形状的碳骨架中，然后在空气中的退火过程中，原位转化为碳骨架内的 V2O5。作为锂离子电池的阴极材料，多孔 V2O5@C 复合材料由于 V2O5 和碳复合材料的协同效应，表现出增强的电化学性能。
