A simple and effective method was developed to obtain the electrode for lithium/sulfur (Li/S) batteries with high specific capacity and cycling durability via adopting an interconnected sulfur/activated carbon/graphene (reduced graphene oxide) aerogel (S/AC/GA) cathode architecture. The AC/GA composite with a well-defined interconnected conductive network was prepared by a reduction-induced self-assembly process, which allows for obtaining compact and porous structures. During this process, reduced graphene oxide (RGO) was formed, and due to the presence of oxygen-containing functional groups on its surface, it not only improves the electronic conductivity of the cathode but also effectively inhibits the polysulfides dissolution and shuttle. The introduced activated carbon allowed for lateral and vertical connection between individual graphene sheets, completing the formation of a stable three-dimensionally (3D) interconnected graphene framework. Moreover, a high specific surface area and 3D interconnected porous structure efficiently hosts a higher amount of active sulfur material, about 65 wt %. The designed S/AC/GA composite electrodes deliver an initial capacity of 1159 mAh g−1 at 0.1 C and can retain a capacity of 765 mAh g−1 after 100 cycles in potential range from 1 V to 3 V.
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机译：开发了一种简单且有效的方法，以通过采用相互连接的硫/活性炭/石墨烯（S / AC / GA），获得具有高比容量和循环耐久性的锂/硫（LI / S）电池的电极和循环耐久性。（S / AC / GA ）阴极架构。通过减少诱导的自组装工艺制备具有明确定义的互连导电网络的AC / GA复合材料，其允许获得紧凑且多孔的结构。在该方法期间，形成了石墨烯（RGO），并且由于其表面上存在含氧官能团，它不仅改善了阴极的电子电导率，而且有效地抑制多硫化物溶解和梭。引入的活性炭允许各个石墨烯片之间的横向和垂直连接，完成稳定的三维（3D）互连的石墨烯框架的形成。此外，高比表面积和3D互连的多孔结构有效地占较高量的活性硫材料，约65wt％。所设计的S / AC / GA复合电极在0.1℃下提供1159mAh G-1的初始容量，并且在100次潜在范围内的100个循环之后，可以在1 V至3V的潜在范围内保留765mAhg-1的容量。
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