4.7 Article

Design and construction of hierarchical sea urchin-like NiCo-LDH@ACF composites for high-performance supercapacitors

Journal

INDUSTRIAL CROPS AND PRODUCTS
Volume 171, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.indcrop.2021.113900

Keywords

Activated carbon fiber; NiCo-LDH; Microwave-assisted hydrothermal; Core-shell structure; Supercapacitor

Funding

  1. National Natural Science Foundation of China [31971593]
  2. Natural Science Foundation of Fujian Province Department of Science and Technology [2019J01386]
  3. Science and Technology Innovation Project of Fujian Agriculture and Forestry University [CXZX2019103]
  4. Undergraduate Innovation Program of Fujian Agriculture and Forestry University [201910389238]

Ask authors/readers for more resources

Activated carbon fiber (ACF) from Chinese fir wood powder by melt-spinning was used to prepare a NiCo-LDH@ACF composite material via a microwave-assisted synthesis method, which shows great potential as electrode materials for energy storage devices. The Ni1Co1-LDH@ACF composite exhibits the largest specific capacitance and high rate performance at a molar ratio of Ni2+/Co2+ of 1:1. Moreover, the assembled asymmetric supercapacitor device with NiCo-LDH@ACF composites and fir bark-based activated carbons demonstrates superior energy density and cycle life.
Activated carbon fiber (ACF) from Chinese fir wood powder by melt-spinning was used to prepare a NiCo-LDH@ACF composite material via a microwave-assisted synthesis method, which contained two-dimensional nanosheets and sea urchin-like microspheres with a core-shell structure. Regulating the proportion of Ni2+ and Co2+ in NiCo-LDH@ACF can significantly change the apparent morphology, hierarchical porosity and active sites, thereby affecting the electrochemical performance. When the molar ratio of Ni2+/Co2+ is 1:1, Ni1Co1-LDH@ACF has the largest specific capacitance of 1453 F/g and a very high rate performance of 78 % at 10 A/g. In addition, asymmetric supercapacitors are assembled using NiCo-LDH@ACF composites as the positive electrode and fir bark-based activated carbons as the negative electrode material. The assembled asymmetric supercapacitor device possesses a high specific capacitance of 147 F/g at 1 A/g, superior energy density of 52.2 Wh/kg at 800 W/kg and an incredible cycle life of 79.8 % after 10,000 cycles. All these results suggest that NiCo-LDH@ACF composites have great potential as electrode materials for energy storage devices that benefit from the synergistic effect of both the NiCo-LDH and carbon materials of the ACFs.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available