†Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, D-01069 Dresden, Germany.
§Physical Chemistry of Polymer Materials, Technische Universität Dresden, D-01062 Dresden, Germany.
ACS Nano. 2015 Jun 23;9(6):6147-57. doi: 10.1021/acsnano.5b01406. Epub 2015 May 29.
This study reports on a facile approach to the fabrication of nanoporous carbon cathodes for lithium sulfur batteries using gyroid carbon replicas based on use of polystyrene-poly-4-vinylpyridine (PS-P4VP) block copolymers as sacrificial templates. The free-standing gyroid carbon network with a highly ordered and interconnected porous structure has been fabricated by impregnating the carbon precursor solution into the gyroid block copolymer nanotemplates and subsequently carbonizing them. A wide range of analytical tools have been employed to characterize fabricated porous carbon material. Prepared nanostructures are envisioned to have a great potential in myriad areas such as energy storage/conversion devices owing to their fascinating morphology exhibiting high surface area and uniform porosity with interconnected three-dimensional networks. The resulting carbon nanoporous structures infused with elemental sulfur have been found to work as a promising electrode for lithium sulfur batteries demonstrating a high cycling stability over more than 200 cycles.
本研究报告了一种简便的方法，使用基于聚苯乙烯-聚 4-乙烯基吡啶（PS-P4VP）嵌段共聚物作为牺牲模板，制备用于锂硫电池的纳米多孔碳阴极。通过将碳前体溶液注入到介晶嵌段共聚物纳米模板中并随后碳化，制备了具有高度有序和互连多孔结构的独立介晶碳网络。采用多种分析工具对制备的多孔碳材料进行了表征。由于其具有迷人的形态，表现出高比表面积和均匀的多孔性以及互连的三维网络，因此所制备的纳米结构有望在储能/转换装置等众多领域具有巨大的潜力。已经发现，注入元素硫的所得碳纳米多孔结构可用作锂硫电池的有前途的电极，在超过 200 次循环中表现出高循环稳定性。
