蛋黄
材料科学
壳体(结构)
化学工程
动力学
纳米技术
体积热力学
微球
离子
复合材料
化学
有机化学
食品科学
量子力学
物理
工程类
作者
You Na Ko,Seung Ho Choi,Sewon Park,Yun Chan Kang
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2014-07-08
卷期号:6 (18): 10511-10511
被引量:230
摘要
Yolk–shell-structured MoSe2 microspheres were prepared via a simple selenization process of MoO3 microspheres. The yolk–shell-structured MoSe2 and MoO3 microspheres delivered initial discharge capacities of 527 and 465 mA h g−1 in the voltage range of 0.001–3 V vs. Na/Na+ at a current density of 0.2 A g−1, respectively, and their discharge capacities after 50 cycles were 433 and 141 mA h g−1, respectively. The yolk–shell-structured MoSe2 microspheres also exhibited outstanding high rate capabilities. The hierarchical yolk–shell structure comprised of wrinkled nanosheets facilitated fast Na-ion and electron kinetics, and buffered the large volume changes encountered during cycling.
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