• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Boosting the electrochemical properties of carbon materials as bipolar electrodes by introducing oxygen functional groups
【24h】

Boosting the electrochemical properties of carbon materials as bipolar electrodes by introducing oxygen functional groups

机译：通过引入氧官能团提高碳材料作为双极电极的电化学特性

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Carbon materials are often used as both positive and negative electrodes (bipolar electrode materials) in energy storage devices, which significantly reduces the preparation complexity of the electrode. Herein, oxygen-modified carbon nanotubes mounted on carbon cloth (CCC) present a high areal capacitance as both positive and negative electrodes in a safe neutral electrolyte. The introduction of oxygen functional groups facilitates the formation of many electrochemical active sites and defects conducive to ion diffusion. When carbon materials are utilized as negative electrodes, the charge storage characteristics are mainly dependent on the adsorption and desorption of the ions (corresponding to the electric double layer capacitance). Whereas, when utilized as positive electrodes, the charge storage characteristics come from the intercalation and de-intercalation of the electrolyte ions in the multi-defect carbon material. The maximum areal capacitance measured at the positive electrode and negative electrode was 336 mF cm ~(?2) and 158 mF cm ~(?2) , respectively. The measured areal capacitance of the assembled symmetrical supercapacitors was 93.6 mF cm ~(?2) , and the areal energy density reached 33 μW h cm ~(?2) at a power density of 793 μW cm ~(?2) . It is believed that the efficient preparation method and electrochemical mechanism elucidated in this work can guide the practical applications of carbon cloth in supercapacitors.
机译：碳材料通常用作能量存储装置中的正极和负电极（双极电极材料），这显着降低了电极的制备复杂性。这里，安装在碳布（CCC）上的氧气改性碳纳米管在安全中性电解质中作为正极和负电极呈现高的面积电容。氧官能团的引入有助于形成许多电化学活性位点和有利于离子扩散的缺陷。当碳材料用作负电极时，电荷存储特性主要取决于离子的吸附和解吸（对应于电双层电容）。然而，当用作正电极时，电荷存储特性来自多缺陷碳材料中电解质离子的插层和去移。在正电极和负电极处测量的最大面积电容分别为336mF cm〜（Δ2）和158mF cm〜（Δ2）。所测量的对称超级电容器的测量的面积电容为93.6mF cm〜（Δ2），并且在功率密度为793μwcm〜（Δ2）的功率密度下达到33μwHcm〜（Δ2）。据信，在本工作中阐明的有效制备方法和电化学机理可以指导碳布在超级电容器中的实际应用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号