Potentiodynamic polarization assisted phosphorus-containing amorphous trimetal hydroxide nanofibers for highly efficient hybrid supercapacitors

Nilesh R. Chodankar, Ganji Seeta Rama Raju, Bumjun Park, Pragati A. Shinde, Seong Chan Jun, Deepak P. Dubal, Yun Suk Huh, Young Kyu Han

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30 Citations (Scopus)


Due to their high capacity, nickel-cobalt-based cathode materials have attracted significant attention as potential components of hybrid solid-state supercapacitors (HSSCs). However, their poor cycling stability and low rate capability have impeded their implementation. In the present study, a single-step, binder-free potentiodynamic polarization approach is presented for the preparation of battery-Type phosphorus-containing amorphous trimetal nickel-ruthenium-cobalt hydroxide (P@NRC-OH) nanofibers on Ni foam for use in high-energy, stable HSSCs. The phosphate dopant and the trimetal-rich electrode surface increase the intrinsic electron conductivity and redox activity and generate a large number of active defects. As a consequence, a P@NRC-OH electrode exhibited enhanced energy storage properties in terms of specific capacity (541.66 mA h g-1 at 3 mA cm-2), cycling durability (90.35% over 20 000 cycles), and rate capability (308.64 mA h g-1 at 20 mA cm-2). An assembled full-cell HSSC with P@NRC-OH nanofibers as the cathode material and porous activated carbon as the anode material produced a maximum specific energy of 90.02 W h kg-1 at a specific power of 1363 W kg-1 which remained as high as 37.87 W h kg-1 at a power density of 6818.18 W kg-1, with remarkable cycling stability over 15 000 charge-discharge cycles. The proposed approach thus represents a scalable and efficient strategy for the design of electrodes and devices with superior electrochemical performance.

Original languageEnglish
Pages (from-to)5721-5733
Number of pages13
JournalJournal of Materials Chemistry A
Issue number11
Publication statusPublished - 2020 Mar 21

Bibliographical note

Funding Information:
The present work was supported by National Research Foundation of Korea (NRF) grants funded by the Korean government (MSIT) (2014R1A5A1009799, 2019R1G1A1100465, and 2019R1A2C1008257).

Publisher Copyright:
This journal is © The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)


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