Scholarlink

<p>Self-supported CoSe<sub>2</sub> nanorod@nanosheet (NR@NS) with elm-branched hierarchical structure is grown on cobalt foam via solvothermal route. Time-dependent experimental results demonstrate that hierarchical CoSe<sub>2</sub> NR@NS undergoes the morphological evolution from nanorod to nanorod@nanowire, then to nanorod@nanobelt, and finally to nanorod@nanosheet. This elm-branched nanostructure endows the hierarchical CoSe<sub>2</sub> NR@NS with large accessible surface area and short charge transfer path, maximizing the electronic conductivity and interfacial mass transfer capabilities. Hence, self-supported CoSe<sub>2</sub> NR@NS exhibits the tantalizing energy-storage performance with the specific capacity of 6.13 F/cm<sup>2</sup> (497.6 F/g) at 5&#xa0;mA/cm<sup>2</sup>, high rate performance of 56.3% from 5 to 20 A/g, and a capacity retention of 92.73% following 10,000 cycles. Importantly, the assembled hybrid supercapacitor, based on CoSe<sub>2</sub> NR@NS and activated carbon, exhibits the high energy density of 26.8 Wh/kg at the power density of 118 W/kg, and 98.88% capacitance retention after 5000 cycles. Meanwhile, present full-cell devices in series can drive commercial electronic products, even for cell-phone. These exceptional findings not only underscore the significant implications and practical utility of self-supported CoSe<sub>2</sub> NR@NS, but also offer valuable insights and guidance for the design of high-performance electrodes.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Self-supported hierarchical CoSe2 nanorod@nanosheet with elm-branched structure suitable for hybrid supercapacitors

  • 期刊论文

  • 发表日期：

    2025年5月7日

查看全文
  • Jiamin Fu,
  • Shanshan Liu,
  • Xue Chen,
  • Chengzhen Wei,
  • Yixin Wang,
  • Weimin Du

摘要

Self-supported CoSe2 nanorod@nanosheet (NR@NS) with elm-branched hierarchical structure is grown on cobalt foam via solvothermal route. Time-dependent experimental results demonstrate that hierarchical CoSe2 NR@NS undergoes the morphological evolution from nanorod to nanorod@nanowire, then to nanorod@nanobelt, and finally to nanorod@nanosheet. This elm-branched nanostructure endows the hierarchical CoSe2 NR@NS with large accessible surface area and short charge transfer path, maximizing the electronic conductivity and interfacial mass transfer capabilities. Hence, self-supported CoSe2 NR@NS exhibits the tantalizing energy-storage performance with the specific capacity of 6.13 F/cm2 (497.6 F/g) at 5 mA/cm2, high rate performance of 56.3% from 5 to 20 A/g, and a capacity retention of 92.73% following 10,000 cycles. Importantly, the assembled hybrid supercapacitor, based on CoSe2 NR@NS and activated carbon, exhibits the high energy density of 26.8 Wh/kg at the power density of 118 W/kg, and 98.88% capacitance retention after 5000 cycles. Meanwhile, present full-cell devices in series can drive commercial electronic products, even for cell-phone. These exceptional findings not only underscore the significant implications and practical utility of self-supported CoSe2 NR@NS, but also offer valuable insights and guidance for the design of high-performance electrodes.

Graphical Abstract