Binder-free cobalt phosphate one-dimensional nanograsses as ultrahigh-performance cathode material for hybrid supercapacitor applications

K. Vijaya Sankar, S. C. Lee, Y. Seo, C. Ray, S. Liu, A. Kundu, S. C. Jun

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)

Abstract

One-dimensional (1D) nanostructure exhibits excellent electrochemical performance because of their unique physico-chemical properties like fast electron transfer, good rate capability, and cyclic stability. In the present study, Co3(PO4)2 1D nanograsses are grown on Ni foam using a simple and eco-friendly hydrothermal technique with different reaction times. The open space with uniform nanograsses displays a high areal capacitance, rate capability, energy density, and cyclic stability due to the nanostructure enhancing fast ion and material interactions. Ex-situ microscope images confirm the dependence of structural stability on the reaction time, and the nanograsses promoted ion interaction through material. Further, the reproducibility of the electrochemical performance confirms the binder-free Co3(PO4)2 1D nanograsses to be a suitable high-performance cathode material for application to hybrid supercapacitor. Finally, the assembled hybrid supercapacitor exhibits a high energy density (26.66 Wh kg−1 at 750 W kg−1) and longer lifetimes (80% retained capacitance after 6000 cycles). Our results suggests that the Co3(PO4)2 1D nanograss design have a great promise for application to hybrid supercapacitor.

Original languageEnglish
Pages (from-to)211-219
Number of pages9
JournalJournal of Power Sources
Volume373
DOIs
Publication statusPublished - 2018 Jan 1

Bibliographical note

Funding Information:
This research was partially supported by Nano·Material Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning ( NRF-2017M3A7B4041987 ), the Priority Research Centers Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology , ( 2009-0093823 ) and the National Center for Optically Assisted Mechanical Systems, through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (No. 2015R1A5A1037668 ). Appendix A

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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