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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >NiS2/rGO/S capable of lithium polysulfide trapping as an enhanced cathode material for lithium sulfur batteries
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NiS2/rGO/S capable of lithium polysulfide trapping as an enhanced cathode material for lithium sulfur batteries

机译：NIS2 / RGO / S能够作为锂硫电池的增强的阴极材料捕获锂多硫化物

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摘要

To realize the practical application of lithium sulfur batteries, it is critical to build up a rational cathode structure which is highly conductive and also has the ability to adsorb the soluble lithium polysulfides generated during operation. In this work, we demonstrate a NiS2/rGO/S electrode material in which rGO serves as the conductive agent and NiS2 as the soluble lithium polysulfides adsorbent. The NiS2/rGO/S was synthesized via a microwave-assisted method with a subsequent sulfur deposition process. The catalytic properties and adsorption capacity of NiS2 have been confirmed by electrochemical characterization and adsorption experiments. Benefiting from the strong chemical bonding between the NiS2 and lithium polysulfide species, catalytic activity of NiS2, and good electrical conductivity of rGO, the nanostructured sulfur cathode maintains a higher specific capacity of 400 mAh g(-1) after 800 cycles at a rate of 1.0 C with a Coulombic efficiency of about 98%. (c) 2018 Elsevier B.V. All rights reserved.
机译：为了实现锂硫电池的实际应用，构建具有高导电的合理阴极结构至关重要，并且还具有吸附在操作期间产生的可溶性锂多硫化物的能力。在这项工作中，我们证明了一种NIS2 / RGO / S电极材料，其中RGO用作导电剂和NIS2作为可溶性锂多硫化物吸附剂。通过微波辅助方法合成NIS2 / RGO / S，其具有随后的硫沉积方法。通过电化学表征和吸附实验证实了NIS2的催化性质和吸附能力。受益于NIS2和多硫化锂物种之间的强化学键合，NIS2的催化活性，以及​​RGO的良好导电性，纳米结构的硫阴极在​​800次循环后保持较高的400mAhg（-1）的特定容量1.0℃，库仑效率约为98％。 （c）2018年elestvier b.v.保留所有权利。

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