• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Synthesis of hierarchically porous carbon spheres by an emulsification-crosslinking method and their application in supercapacitors
【24h】

Synthesis of hierarchically porous carbon spheres by an emulsification-crosslinking method and their application in supercapacitors

机译：通过乳化交联法合成分层多孔碳球及其在超级电容器中的应用

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

Porous carbon materials have greatly developed as promising electrode materials for electric double-layer capacitors (EDLCs). Herein, hierarchically porous carbon spheres (HPCSs) were synthesized by using chitosan, glutaraldehyde and KOH as the carbon source, crosslinking agent and chemical activating agent, respectively. The morphology of the HPCSs was characterized by scanning electron microscopy and transmission electron microscopy, while the porous structural features, including high specific surface area (1974 m(2) g(-1)), total pore volume (2.52 cm(3) g(-1)) and wide pore-size distribution, were measured by nitrogen sorption technology. Electrochemical tests in a three-electrode cell indicated that the prepared HPCSs displayed excellent capacitive performances (328 F g(-1)), and good cycling stability with approximately 9% of capacitance reduction after 10 000 times of cycling. Moreover, the electrochemical properties characterized in a two-electrode system indicated that the specific capacitance is 66.1 F g(-1) at a current density of 0.5 A g(-1), and the energy density is 8.3 W h kg(-1) at a power density of 6 kW kg(-1), demonstrating that the obtained HPCSs are a potential electrode material and met well the practical requirement for an EDLC.
机译：多孔碳材料具有很大的发展前途的作为电极材料的双电层电容器（EDLC的）。这里，分级多孔碳球（HPCSs）通过使用壳聚糖，戊二醛和KOH作为碳源，分别交联剂和化学活化剂，合成的。所述HPCSs的形态，其特征在于扫描电子显微镜和透射电子显微镜，而多孔的结构特征，包括高比表面积的（1974米（2）克（-1）），总孔隙体积（2.52厘米（3）克（-1））和宽孔隙大小分布中，通过氮吸附技术测量的。在三电极电池的电化学测试表明，制得的显示HPCSs优异电容特性（328 F G（-1）），和良好的循环稳定性与后循环的10万次减小电容的大约9％。此外，电化学特性，其特征在于在一个两电极系统表明，比电容是66.1 F G（-1）的0.5 A克（-1）的电流密度，并且能量密度是8.3 W时公斤（-1 ）在6千瓦公斤（功率密度-1），这表明所得到的HPCSs是一个潜在的电极材料和满足井的实际需要用于EDLC。

著录项

  • 来源
    《RSC Advances》 |2016年第60期|共9页
  • 作者

    Zhang Dingjun; Gao Jiechang; Li Zhangpeng; He Shuhua; Wang Jinqing;

  • 作者单位

    Lanzhou Univ Technol State Key Lab Adv Proc &

    Recycling Nonferrous Met Lanzhou 730050 Peoples R China;

    Lanzhou Univ Technol State Key Lab Adv Proc &

    Recycling Nonferrous Met Lanzhou 730050 Peoples R China;

    Chinese Acad Sci Lanzhou Inst Chem Phys State Key Lab Solid Lubricat Lanzhou 730000 Peoples R China;

    Chinese Acad Sci Lanzhou Inst Chem Phys State Key Lab Solid Lubricat Lanzhou 730000 Peoples R China;

    Chinese Acad Sci Lanzhou Inst Chem Phys State Key Lab Solid Lubricat Lanzhou 730000 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 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