Carbon Paper with a High Surface Area Prepared from Carbon Nanofibers Obtained through the Liquid Pulse Injection Technique
Carbon Paper with a High Surface Area Prepared from Carbon Nanofibers Obtained through the Liquid Pulse Injection Technique
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DOI：
10.1021/acsomega.7b01822
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发表时间：
2018-01
期刊：
影响因子：
4.1
通讯作者：
Kazuki Sakai;Shinichiroh Iwamura;Ryo Sumida;I. Ogino;S. Mukai
中科院分区：
文献类型：
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作者：
Kazuki Sakai;Shinichiroh Iwamura;Ryo Sumida;I. Ogino;S. Mukai
为了提高碳纸在电化学装置电极和空气过滤器等应用中的性能，采用液体脉冲注入（LPI）技术，通过调节反应条件制备了平均直径为20和49 nm的两种长碳纳米纤维（CNFs）。通过简单的过滤过程由CNF制成碳纸。由平均直径为20 nm的CNF制备的纸（LPI-CNF（20）纸）即使在不使用任何粘合剂的情况下制备，也是坚固和柔韧的。LPI-CNF（20）纸也具有高表面积，并根据其空隙尺寸显示出高电导率和中等透气性。这些性能是最新电池系统（如锂空气电池）中阴极所需的。在为评价LPI-CNF（20）纸作为阴极的性能而进行的电化学实验中，基于阴极重量，该纸显示出比常规阴极（与多孔碳组合的市售碳纸）更大的放电容量，这表明其具有用作锂-空气电池中的阴极的高潜力。
To improve the performance of carbon paper used for applications such as electrodes for electrochemical devices and air filters, two types of long carbon nanofibers (CNFs) with average diameters of 20 and 49 nm were prepared by the liquid pulse injection (LPI) technique by adjusting reaction conditions. Carbon paper was made from the CNFs through a simple filtration process. The paper prepared from the CNFs with an average diameter of 20 nm (LPI-CNF(20) paper) was firm and flexible even though it was prepared without using any binders. LPI-CNF(20) paper also had a high surface area and showed a high electrical conductivity and a moderate gas permeability according to its void size. These properties are required for cathodes in the latest battery systems such as lithium–air batteries. In electrochemical experiments conducted to evaluate the performance of LPI-CNF(20) paper as a cathode, the paper showed a larger discharge capacity on the basis of the cathode weight than a conventional cathode (a commercially available carbon paper combined with a porous carbon), which indicated that it has a high potential to be used as a cathode in lithium–air batteries.