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首页> 外文期刊>RSC Advances >Self-supporting S@GO-FWCNTs composite films as positive electrodes for high-performance lithium-sulfur batteries
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Self-supporting S@GO-FWCNTs composite films as positive electrodes for high-performance lithium-sulfur batteries

机译：自支撑的S @ Go-FWCNTS复合膜作为高性能锂 - 硫磺电池的正电极

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摘要

Although lithium-sulfur (Li-S) batteries are a promising secondary power source, it still faces many technical challenges, such as rapid capacity decay and low sulfur utilization. The loading of sulfur and the weight percentage of sulfur in the cathode usually have a significant influence on the energy density. Herein, we report an easy synthesis of a self-supporting sulfur@ graphene oxide-few-wall carbon nanotube (S@GO-FWCNT) composite cathode film, wherein an aluminum foil current collector is replaced by FWCNTs and sulfur particles are uniformly wrapped by graphene oxide along with FWCNTs. The 10 wt% FWCNT matrix through ultrasonication not only provided self-supporting properties without the aid of metallic foil, but also increased the electrical conductivity. The resulting S@GO-FWCNT composite electrode showed high rate performance and cycle stability up to similar to 385.7 mA h g(electrode) similar to 1 after 500 cycles and close to similar to 0.04% specific capacity degradation per cycle, which was better than a S@GO composite electrode (353.1 mA h g(electrode)(-1)). This S@ GO-FWCNT composite self-supporting film is a promising cathode material for high energy density rechargeable Li-S batteries.
机译：虽然锂 - 硫（LI-S）电池是一个有前途的二次电源，但它仍然面临许多技术挑战，例如快速容量衰减和低硫利用率。硫的负载和阴极中硫的重量百分比通常对能量密度具有显着的影响。在此，我们报告了易于合成的自支撑硫@石墨烯氧化物 - 少壁碳纳米管（S @ Go-FWCNT）复合阴极膜，其中铝箔集电器被FWCNT和硫颗粒均匀包裹氧化物与FWCNT一起。通过超声波的10wt％FWCNT基质不仅提供了无需金属箔的辅助的自支撑性，而且增加了电导率。得到的S @ Go-FWCNT复合电极显示出高速率性能和循环稳定性，与385.7 mA Hg（电极）相似，类似于500次循环后的1，并且接近每循环的特定容量降低0.04％，这比a更好S @ GO合成电极（353.1 mA Hg（电极）（ - 1））。该S @ Go-FWCNT复合自支撑膜是高能量密度可充电LI-S电池的有希望的阴极材料。

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  • 来源
    《RSC Advances》 |2018年第5期|共7页
  • 作者

    Cui Lifeng; Xue Yanan; Noda Suguru; Chen Zhongming;

  • 作者单位

    Univ Shanghai Sci &

    Technol Sch Mat Sci &

    Engn Shanghai 200093 Peoples R China;

    Univ Shanghai Sci &

    Technol Sch Mat Sci &

    Engn Shanghai 200093 Peoples R China;

    Waseda Univ Sch Adv Sci &

    Engn Dept Appl Chem Shinjuku Ku 3-4-1 Okubo Tokyo 1698555 Japan;

    Dongguan Univ Technol Sch Environm &

    Civil Engn Guangdong Engn &

    Technol Res Ctr Adv Nanomat Dongguan 523808 Guangdong Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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