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首页> 外文期刊>Journal of power sources >A dual pore carbon aerogel based air cathode for a highly rechargeable lithium-air battery
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A dual pore carbon aerogel based air cathode for a highly rechargeable lithium-air battery

机译：基于双孔碳气凝胶的空气阴极，用于高度可充电的锂空气电池

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摘要

Cathode structure plays a vital role in lithium-air battery for that it can provide space for discharged products accommodation and free path for oxygen, e~- and Li~+ transport. However, pore blockage, cathode passivation and degradation all result in low discharge rates and poor cycling capability. To get rid of these predicaments, a novel highly conductive dual pore carbon aerogel based air cathode is fabricated to construct a lithium-air battery, which exhibits 18 to 525 cycles in the LiTFSI/sulfolane electrolyte at a current density varying from 1.00 mA cm~(-2) to 0.05 mA cm~(-2), accompanied by a high energy efficiency of 78.32%. We postulate that the essence lies in that the as-prepared air cathode inventively create a suitable tri-phase boundary reaction zone, facilitating oxygen and Li~+ diffusion in two independant pore channels, thus realizing a relative higher discharge rate capability, lower pore blockage and cathode passivation. Further, pore structure, carbon loading, rate capability, discharge depth and the air's effect are exploited and coordinated, targeting for a high power and reversible lithium-air battery. Such nano-porous carbon aerogel air cathode of novel dual pore structure and material design is expected to be an attractive alternative for lithium-air batteries and other lithium based batteries.
机译：阴极结构在锂空气电池中起着至关重要的作用，因为它可以为排出的产品提供空间，并为氧气，电子和锂的运输提供自由的路径。但是，孔堵塞，阴极钝化和降解都会导致放电速率低和循环能力差。为了摆脱这些困境，制造了一种新型的高导电性双孔碳气凝胶基空气阴极来构建锂空气电池，该锂空气电池在LiTFSI /环丁砜电解质中的电流密度在1.00 mA cm〜2之间，具有18至525个循环。 （-2）至0.05 mA cm〜（-2），伴随着78.32％的高能效。我们推测其实质在于，所制备的空气阴极创造性地创造了一个合适的三相边界反应区，促进了氧气和Li〜+在两个独立的孔道中的扩散，从而实现了相对较高的放电速率能力，较低的孔阻塞和阴极钝化。此外，针对高功率和可逆锂-空气电池，开发并协调了孔结构，碳载量，速率能力，放电深度和空气影响。这种具有新颖的双孔结构和材料设计的纳米多孔碳气凝胶空气阴极有望成为锂空气电池和其他锂基电池的有吸引力的替代品。

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  • 来源
    《Journal of power sources》 |2014年第25期|1061-1071|共11页
  • 作者

    Fang Wang; Yang-Hai Xu; Zhong-Kuan Luo; Yan Pang; Qi-Xing Wu; Chun-Sheng Liang; Jing Chen; Dong Liu; Xiang-hua Zhang;

  • 作者单位

    College of Chemistry and Chemical Engineering, Shenzhen University, China,3688 Nanhai Avenue, Nanshan District, Shenzhen 518060, China;

    College of Chemistry and Chemical Engineering, Shenzhen University, China;

    College of Chemistry and Chemical Engineering, Shenzhen University, China, Zhejiang California International NanoSystems Institute, Department of Materials Science and Engineering, Zhejiang University, China,3688 Nanhai Avenue, Nanshan District, Shenzhen 518060, China;

    College of Chemistry and Chemical Engineering, Shenzhen University, China;

    College of Chemistry and Chemical Engineering, Shenzhen University, China;

    College of Chemistry and Chemical Engineering, Shenzhen University, China;

    College of Chemistry and Chemical Engineering, Shenzhen University, China;

    College of Chemistry and Chemical Engineering, Shenzhen University, China;

    College of Chemistry and Chemical Engineering, Shenzhen University, China, Laboratory of Glasses and Ceramics, UMR CNRS 6226 'Institut des Sciences Chimiques de Rennes', Universite de Rennes I, 35042 Rennes, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lithium-air battery; Carbon aerogel; Dual pore structure; Cathode passivation; Sulfolane;

    机译：锂空气电池;碳气凝胶双孔结构;阴极钝化;环丁砜;

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