C-Plasma of Hierarchical Graphene Survives SnS Bundles for Ultrastable and High Volumetric Na-Ion Storage
C-Plasma of Hierarchical Graphene Survives SnS Bundles for Ultrastable and High Volumetric Na-Ion Storage
复制标题
DOI：
10.1002/adma.201804833
复制
发表时间：
2018-12-06
影响因子：
29.4
通讯作者：
Fan, Hong Jin
中科院分区：
文献类型：
--
作者：
Chao, Dongliang;Ouyang, Bo;Fan, Hong Jin
锡及其衍生物是高容量钠离子负极材料的重要组成部分。然而，在单个电极中实现高面积和体积容量并保持长期稳定性仍然具有挑战性。在这里，开发了一种优雅和通用的策略，以显着延长硫化锡纳米带电极的寿命和倍率性能，同时保持高的面积和体积容量。在该策略中，通过快速（5分钟）碳等离子体方法，以可持续油为碳源，以部分还原的Sn为催化剂，在硫化锡纳米带网络上均匀地生长原位成束的坚固的分级石墨烯（hG）。利用密度泛函理论计算系统地研究了石墨烯CN（尺寸N从1到24）在Sn（111）表面上的成核过程。它表明，这种化学键合的hG策略是强大的，在提高整体电化学性能。
Tin and its derivatives have provoked tremendous progress of high-capacity sodium-ion anode materials. However, achieving high areal and volumetric capability with maintained long-term stability in a single electrode remains challenging. Here, an elegant and versatile strategy is developed to significantly extend the lifespan and rate capability of tin sulfide nanobelt electrodes while maintaining high areal and volumetric capacities. In this strategy, in situ bundles of robust hierarchical graphene (hG) are grown uniformly on tin sulfide nanobelt networks through a rapid (5 min) carbon-plasma method with sustainable oil as the carbon source and the partially reduced Sn as the catalyst. The nucleation of graphene, CN (with size N ranging from 1 to 24), on the Sn(111) surface is systematically explored using density functional theory calculations. It is demonstrated that this chemical-bonded hG strategy is powerful in enhancing overall electrochemical performance.