Designing an interlayer of reduced graphene oxide aerogel and nitrogen-rich graphitic carbon nitride by a layer-by-layer coating for high-performance lithium sulfur batteries
Designing an interlayer of reduced graphene oxide aerogel and nitrogen-rich graphitic carbon nitride by a layer-by-layer coating for high-performance lithium sulfur batteries
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DOI：
10.1016/j.carbon.2018.08.008
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发表时间：
2018-11
期刊：
影响因子：
10.9
通讯作者：
Juthaporn Wutthiprom;Nutthaphon Phattharasupakun;Montree Sawangphruk
中科院分区：
文献类型：
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作者：
Juthaporn Wutthiprom;Nutthaphon Phattharasupakun;Montree Sawangphruk
本文中，具有3D互连导电和多孔结构的还原氧化石墨烯气凝胶（GA）用作硫的主体（S@GA阴极）。GA还与富氮石墨碳氮化物（GCN）一起用作容纳可溶性多硫化锂（LPS）的中间层。该中间层是通过在柔性的可加工的碳纤维纸（CFP）基底上逐层涂覆技术制备的。插入阴极和隔板之间的夹层提供了强的多硫化锂吸附性。层间吸附的LPS物种也进行了研究，通过anexsituX-射线光电子能谱。在微调之后，使用具有GA/GCN中间层的S@GA阴极的所制造的LSB表现出比没有中间层的电池高75%的比容量。经800次循环测试，其容量衰减率为0.056%/循环。我们的LSB的新设计和配置实际上可以用于高能量应用，因为它可以有效地解决当前LSB的许多问题。
Herein, reduced graphene oxide aerogel (GA) with 3D interconnected conductive and porous structure was used as a host of sulfur (S@GA cathode). GA was also used together with nitrogen-rich graphitic carbon nitride (GCN) as the interlayer accommodating the soluble lithium polysulfides (LPSs). The interlayer was fabricated by a layer-by-layer coating technique on the flexible and processible carbon fiber paper (CFP) substrate. The interlayer inserted between the cathode and the separator provides a strong lithium polysulfide adsorptivity. Adsorptive LPS species on the interlayer were also investigated by anex situX-ray photoelectron spectroscopy. After finely tuned, the as-fabricated LSB using the S@GA cathode with the GA/GCN interlayer exhibits 75% higher specific capacity than the cell without interlayer. It has a low capacity fading of 0.056% per cycle after tested for 800 cycles. Our new design and configuration of LSB may practically be used in high-energy applications since it can effectively address many issues of the current LSBs.