Confining SnS2 Ultrathin Nanosheets in Hollow Carbon Nanostructures for Efficient Capacitive Sodium Storage
Confining SnS2 Ultrathin Nanosheets in Hollow Carbon Nanostructures for Efficient Capacitive Sodium Storage
复制标题
将 SnS2 超薄纳米片限制在中空碳纳米结构中，实现高效电容性钠存储
DOI：
10.1016/j.joule.2018.01.004
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发表时间：
2018-04-18
期刊：
影响因子：
39.8
通讯作者：
Lou, Xiong Wen David
中科院分区：
文献类型：
--
作者：
Liu, Yuhan;Yu, Xin-Yao;Lou, Xiong Wen David
二硫化锡（SnS 2）因其高比容量而成为一种很有前途的钠离子电池负极材料。然而，低电导率和与Na+离子反应时的大体积变化极大地限制了其实际应用。在此，多步模板法已被用于合理设计和合成限制在碳纳米管（SnS2@CNTs）中的SnS2纳米片。为了证明该方法的普适性，我们还通过简单地改变反应体系中的模板合成了限制在碳纳米盒（SnS2@CNBs）和中空碳纳米球（SnS2@CNSs）中的SnS2纳米片。由于其独特的结构优点，SnS2@CNT、SnS2@CNB和SnS2@CNSs在高比容量、良好的循环稳定性和上级倍率性能方面显示出改进的钠存储性能。
Tin disulfide (SnS2) is a promising anode material for sodium-ion batteries because of its high specific capacity. However, the low conductivity and large volume change during reaction with Na+ ions greatly limit its practical application. Herein, a multistep templating method has been exploited for the rational design and synthesis of SnS2 nanosheets confined in carbon nanotubes (SnS2@CNTs). To demonstrate the universality of this method, SnS2 nanosheets confined in carbon nanoboxes (SnS2@CNBs) and hollow carbon nanospheres (SnS2@CNSs) have also been synthesized by simply changing the template in the reaction system. Due to their unique structural merits, the SnS2@CNTs, SnS2@CNBs, and SnS2@CNSs show improved sodium storage performance in terms of high specific capacity, good cycling stability, and superior rate capability.