• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >High-Performance Oxygen Reduction Electrocatalyst Derived from Polydopamine and Cobalt Supported on Carbon Nanotubes for Metal-Air Batteries
【24h】

High-Performance Oxygen Reduction Electrocatalyst Derived from Polydopamine and Cobalt Supported on Carbon Nanotubes for Metal-Air Batteries

机译：载于金属-空气电池碳纳米管上的聚多巴胺和钴衍生的高性能氧还原电催化剂

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The development of nonprecious metal-based electrocatalysts for the oxygen reduction reaction holds the decisive key to many energy conversion devices. Among several potential candidates, transition metal and nitrogen co-doped carbonaceous materials are the most promising, yet their activity and stability are still insufficient to meet the needs of practical applications. In this study, a core-shell hybrid electrocatalyst is developed via the self-polymerization of dopamine and cobalt on carbon nanotubes (CNTs), followed by high-temperature pyrolysis. The polymer-derived carbonaceous shell contains abundant structural defects and facilitates the formation of Co. N/C active sites, whereas the graphitic carbon nanotube core provides high electrical conductivity and corrosion resistance. These two components separately fulfill different functionalities, and jointly afford the catalyst with excellent electrochemical performance. In 1 M KOH, Co-N/CNT exhibits a positive half-wave potential of approximate to 0.91 V, low peroxide yield of <7%, as well as great stability. When used as the air catalyst of primary Zn-air and Al-air batteries, this hybrid electrocatalyst enables large discharge current density, high peak power density, and prolonged operation stability.
机译：用于氧还原反应的非贵金属基电催化剂的开发是许多能量转换装置的决定性关键。在几种潜在的候选材料中，过渡金属和氮共掺杂碳质材料是最有前途的，但它们的活性和稳定性仍不足以满足实际应用的需求。在这项研究中，通过多巴胺和钴在碳纳米管（CNT）上的自聚合，然后进行高温热解，开发了核-壳杂化电催化剂。源自聚合物的碳质壳包含丰富的结构缺陷，并有助于形成Co. N / C活性位，而石墨碳纳米管核则具有较高的导电性和耐腐蚀性。这两种组分分别满足不同的功能，并共同为催化剂提供了优异的电化学性能。在1 M KOH中，Co-N / CNT表现出约0.91 V的正半波电势，<7％的低过氧化物收率以及很高的稳定性。当用作主要的Zn-air和Al-air电池的空气催化剂时，这种混合型电催化剂可实现大的放电电流密度，高的峰值功率密度和延长的运行稳定性。

著录项

  • 来源
    《Advanced Functional Materials》 |2017年第12期|1606034.1-1606034.6|共6页
  • 作者

    Liu Yiling; Chen Fengjiao; Ye Wen; Zeng Min; Han Na; Zhao Feipeng; Wang Xinxia; Li Yanguang;

  • 作者单位

    Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China;

    Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China;

    Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China;

    Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China;

    Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China;

    Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China;

    Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China;

    Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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