...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Ethyl viologen dibromide as a novel dual redox shuttle for supercapacitors
【24h】

Ethyl viologen dibromide as a novel dual redox shuttle for supercapacitors

机译：乙基紫精二溴化物作为超级电容器的新型双重氧化还原梭

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

Viologen (1,1'-diethyl-4,4'-bipyridinium bromide) based redox active electrolyte in 1.0 M H2SO4 has been proposed as a novel electrolyte for supercapacitor (SC) applications due to its dual cathodic and anodic redox behaviour. Unlike other reported redox additives, viologen as a single redox species can improve the performance of both positive and negative electrodes simultaneously through the redox behaviour of bromide and 1,1'-diethyl-4,4'-bipyridinium ions. The synergic redox behaviour of the ions and their effect towards the enhancement of the electrochemical performance of the activated charcoal based SC are compared with those of neat H2SO4 and triethylbutylammonium bromide (N2224Br). The maximum specific capacitance of 408.0 F g(-1) and specific energy of 23.0 W h kg(-1) at 0.25 A g(-1) were obtained for the viologen mediated SC. Interestingly, the specific capacitance continuously increased for the viologen mediated SC on charge-discharge cycling and 30% increment was observed at the end of 1000 cycles. The relaxation time constant is compared for SCs with viologen, neat H2SO4 and (NBr)-Br-2224 electrolytes.
机译：含1.0 M H2SO4的紫精（1,1'-二乙基-4,4'-溴化吡啶鎓）基氧化还原活性电解质已被建议作为超级电容器（SC）应用的新型电解质，因为它具有阴极和阳极双重氧化还原性能。与其他已报道的氧化还原添加剂不同，紫精作为单一的氧化还原物质可以通过溴化物和1,1'-二乙基-4,4'-联吡啶离子的氧化还原行为同时改善正电极和负电极的性能。将离子的协同氧化还原行为及其对增强活性炭基SC电化学性能的影响与纯H2SO4和三乙基丁基溴化铵（N2224Br）进行了比较。紫精介导的SC的最大比电容为408.0 F g（-1），比能量为23.0 W h kg（-1）在0.25 A g（-1）。有趣的是，在充放电循环中，紫精介导的SC的比电容连续增加，在1000次循环结束时观察到30％的增量。比较了含有紫精，纯H2SO4和（NBr）-Br-2224电解质的SC的弛豫时间常数。

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