...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Co-Incorporated NiV2O6/Ni(HCO3)(2) nanoflake arrays grown on nickel foam as a high-performance supercapacitor electrode
【24h】

Co-Incorporated NiV2O6/Ni(HCO3)(2) nanoflake arrays grown on nickel foam as a high-performance supercapacitor electrode

机译：共同掺入的NiV2O6 / Ni（HCO3）（2）纳米铝饼阵列在镍泡沫上生长为高性能超级电容器电极

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

Co-Incorporated NiV2O6/Ni(HCO3)(2) arrays with different morphologies can grow on nickel foam (NF) via a mild one-step hydrothermal method. Among them, S-0.5-20 and S-0.25-20 were obtained at a 1:1:20 molar ratio of Co/V/urea with 0.5 and 0.25 mmol Co(NO3)(2), respectively. They demonstrate high areal capacities of 0.99 mA h cm(-2) (7.94 F cm(-2)) and 0.56 mA h cm(-2) (4.48 F cm(-2)) at 1 mA cm(-2), respectively, which are superior to that of Co-incorporated Ni(HCO3)(2)/NF synthesized in the absence of Na3VO4. S-0.25-20 possesses good rate capability with 82.1% retention when the current density is increased 20-fold, and it shows superior long-term durability with 106.2% retention of the initial capacity after 10000 charging/discharging cycles at 100 mA cm(-2). These results are associated with the porous and orderly hierarchical Co-incorporated NiV2O6/Ni(HCO3)(2) nanoflake arrays directly grown on the Ni foam. Moreover, due to the synergetic effect of the individual components, electrons can be transferred from V centers to Ni active sites, thus improving the stability of the vanadate. The generation of more active species, such as Co3+, during cycling could account for the increased capacity. A S-0.25-10//activated carbon (AC) asymmetrical supercapacitor shows a high energy density of 0.533 mW h cm(-2) at a power density of 0.232 mW cm(-2) (0.415 mW h cm(-2) at 4.983 mW cm(-2)). Furthermore, the formation mechanism of the Co-incorporated NiV2O6/Ni(HCO3)(2) nanoflake arrays is proposed.
机译：具有不同形态学的共同掺入的NiV2O6 / Ni（HCO 3）（2）阵列可以通过温和的一步水热法在镍泡沫（NF）上生长。其中，S-0.5-20和S-0.25-20分别以0.5和0.25mmol CO（2）的CO / v /脲的CO / v / ulea的摩尔比为1：1：20摩尔比。它们证明了0.99 mA H cm（-2）（7.94f cm（-2））和0.56mA H cm（-2）（4.48f cm（-2））的高面积容量（-2），分别优于在没有Na3VO4的情况下合成的共同掺入的Ni（HCO 3）（2）/ NF的掺入的Ni（HCO 3）（2）/ NF。 S-0.25-20具有良好的速率能力，当电流密度增加20倍时，持续82.1％的保留，并显示出优越的长期耐久性，在10000厘米（ -2）。这些结果与直接在Ni泡沫上生长的多孔且有序的分层共同掺入的NiV2O6 / Ni（2）纳米瓶阵列相关。此外，由于各个组分的协同效果，电子可以从V中心转移到Ni活性位点，从而提高钒酸盐的稳定性。在循环期间，在循环期间产生更多活性物种，例如CO3 +可以占增加的容量。 S-0.25-10 //活性炭（AC）不对称超级电容器显示出0.533mWH厘米（-2）的高能密度，功率密度为0.232mm cm（-2）（0.415mW h cm（-2）在4.983 mw cm（-2））。此外，提出了共同掺入的NiV2O6 / Ni（HCO 3）（2）纳米辊阵列的形成机制。

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