• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Sustainable rose multiflora derived nitrogen/oxygen-enriched micro-/mesoporous carbon as a low-cost competitive electrode towards high-performance electrochemical supercapacitors
【24h】

Sustainable rose multiflora derived nitrogen/oxygen-enriched micro-/mesoporous carbon as a low-cost competitive electrode towards high-performance electrochemical supercapacitors

机译：可持续的玫瑰植物群衍生的富氮/氧的微/中碳，作为低成本高性能电化学超级电容器的竞争性电极

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

摘要

Cost-efficient carbonaceous materials have been utilized extensively for advanced electrochemical supercapacitors. However, modest gravimetric/volumetric capacitances are the insuperable bottleneck in their practical applications. Herein, we develop a simple yet scalable method to fabricate low-cost micro-/mesoporous N/O-enriched carbon (NOC-K) by using natural rose multiflora as a precursor with KOH activation. The biomass-derived NOC-K is endowed with a large surface area of ～1646.7 m ~(2) g ~(?1) , micro-/mesoporosity with ～61.3% microporosity, high surface wettability, and a high content of N (～1.2 at%)/O (～26.7 at%) species. When evaluated as an electroactive material for supercapacitors, the NOC-K electrode (5 mg cm ~(?2) ) yields large gravimetric/volumetric specific capacitances of ～340.0 F g ~(?1) (～238.0 F cm ~(?3) ) at 0.5 A g ~(?1) , and even ～200.0 F g ~(?1) (～140.0 F cm ~(?3) ) at 5.0 A g ~(?1) , a low capacitance decay of ～4.2% after 8200 consecutive cycles, and a striking specific energy of ～8.3 W h kg ~(?1) in aqueous KOH electrolyte, benefiting from its intrinsic structural and compositional superiorities. Moreover, a remarkable specific energy of ～52.6 W h kg ~(?1) and ～96.6% capacitance retention over 6500 cycles for the NOC-K based symmetric cell are obtained with the organic electrolyte. More promisingly, the competitive NOC-K demonstrates enormous potential towards advanced supercapacitors both with aqueous and organic electrolytes as a sustainable electrode candidate.
机译：具有成本效益的碳质材料已广泛用于先进的电化学超级电容器。然而，适度的重量/体积电容是其实际应用中不可克服的瓶颈。在这里，我们开发了一种简单而可扩展的方法，通过使用天然蔷薇植物作为具有KOH活化作用的前体，来制造低成本的富含微/中/ N / O的碳（NOC-K）。源自生物质的NOC-K具有约1646.7 m〜（2）g〜（？1）的大表面积，微孔率/中孔率和约61.3％的微孔率，高表面润湿性和高N（ 〜1.2 at％）/ O（〜26.7 at％）物种。当评估为超级电容器的电活性材料时，NOC-K电极（5 mg cm〜（？2））产生的重量/体积比电容约为〜340.0 F g〜（？1）（〜238.0 F cm〜（？3） ））在0.5 A g〜（？1）时甚至达到〜200.0 F g〜（？1）（〜140.0 F cm〜（？3））时，电容衰减低至〜连续8200次循环后为4.2％，在KOH水溶液中的比能高达8.3 W h kg〜（？1），这得益于其固有的结构和组成优势。此外，使用有机电解质，在基于NOC-K的对称电池中，经过6500次循环后，具有约52.6 W h kg〜（？1）的显着比能和〜96.6％的电容保持率。更有希望的是，具有竞争力的NOC-K展示了将水性和有机电解质用作可持续电极候选材料的先进超级电容器的巨大潜力。

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