表界面脱卤反应制备碗状碳材料（英文）

Fabricating Bowl-like Carbon via Interfacial Dehalogenation

碳材料的形貌和结构可显著提升其机械性能和电化学性能。通过硫化钠（Na2S）促进的球状聚氯乙烯（PVDC）颗粒表界面的脱卤反应来制备具有碗状的碳材料。将球状PVDC悬浮在二甲基甲酰胺（DMF）中时,PVDC微球表界面会形成对DMF亲和与不亲和的部分,并完成一定程度的规整排列。通过考察包括PVDC在DMF中的浓度、Fe^2＋的浓度以及质子性溶剂（如乙醇）的添加等因素,证实了影响碗状碳形成的3个重要的因素。由于其在高填充模式下具有良好机械性能的优点,可以预见碗状碳在高面积和体积填充密度下具有良好的电化学性能。

Desirable structure and morphology of carbon materials can significantly improve their mechanical and electrochemical properties.In this study,we report the facile fabrication of bowl-like carbon via interfacial dehalogenation of polyvinyl dichloride（ PVDC） amphipathic shells by mild alkaline of sodium sulphide（ Na2S）,the spherical PVDC amphipathic shells were primarily formed by the alignment of solvent-philic and-phobic parts during the dissolution of PVDC into dimethylformamide（ DMF）. We confirmed several important factors that have significant impacts on the morphology of resulted carbon bowls through setting up control experiments including the concentration of PVDC in DMF,the amount of Fe^2＋species,and the addition of protonic solvent（ such as ethanol）.Due to the merits of good mechanical properties under high packing mode,we may safely envision that the carbon bowls can potentially deliver reasonably good electrochemical performance at high areal and volume packing densities.