Different distribution of in-situ thin carbon layer in hollow cobalt sulfide nanocages and their application for supercapacitors
Different distribution of in-situ thin carbon layer in hollow cobalt sulfide nanocages and their application for supercapacitors
复制标题
DOI：
10.1016/j.jpowsour.2016.12.013
复制
发表时间：
2017-02-15
影响因子：
9.2
通讯作者：
Yan, Mao-Fa
中科院分区：
文献类型：
--
作者：
Jin, Meng;Lu, Shi-Yu;Yan, Mao-Fa
最近，钴硫化物成为能源储备和对话的候选物。然而，硫化钴的稳定性差、速率性能低等问题制约了其实际应用。由于薄碳层涂层可以提高裸材料的巨大性能，因此被认为是一种很有前途的高性能超级电容器构建策略。在这篇文献中，我们报告了一个非常有趣的现象，即通过调整硫化时间，然后煅烧，可以合成不同分布的原位碳包覆空心CoS2纳米笼（外部和内外都有）。此外，可以清楚地观察到CoS2-C@TCL在比电容方面有明显的改善，并且具有良好的稳定性（优于CoS2@TCL和CoS2）。这些结果迫使我们设计了一系列的实验来找出原因，并在本文中讨论了更详细的机制。更重要的是，这将为原位碳包覆硫化物合成特殊结构的能量转换提供新的策略。(C) 2016 Elsevier B.V.版权所有
Recently, cobalt sulfides emerge as a candidate for energy reserve and conversation. However, the problem of poor stability and low rate capability for cobalt sulfides restrict its practical application. Thin carbon layer (TCL) coated has been regarded as a promising constructing strategy for high performance supercapacitors, because TCL can promote the tremendous properties of bare materials. In this literature, we report a very interesting phenomenon that different distribution of in-situ carbon coated hollow CoS2 nanocages (external and both external and interior) can be synthesized only by adjusting sulfuration time, followed by calcination. Moreover, it is clearly observed that CoS2-C@TCL exhibits significant improvement for specific capacitance and good stability (better than CoS2@TCL and CoS2). These results compel us to design a series of experiments to figure out the reason and the more detailed mechanism is discussed in paper. More importantly, it will provide a new strategy for synthesis of special structure with in-situ carbon coated sulfide for energy conversion. (C) 2016 Elsevier B.V. All rights reserved.