Layer-by-layer nanohybrids of Ni-Cr-LDH intercalated with 0D polyoxotungstate for highly efficient hybrid supercapacitor

Navnath S. Padalkar, Shrikant V. Sadavar, Rohini B. Shinde, Akash S. Patil, Umakant M. Patil, Dattatray S. Dhawale, Ravindra N. Bulakhe, Hyungsang Kim, Hyunsik Im, Ajayan Vinu, Chandrakant D. Lokhande, Jayavant L. Gunjakar

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

The layer-by-layer mesoporous nanohybrids of Ni-Cr-layered double hydroxide (Ni-Cr-LDH) and polyoxotungstate nanoclusters (Ni-Cr-LDH-POW) are prepared via exfoliation reassembling strategy. The intercalative hybridization of Ni-Cr-LDH with POW nanoclusters leads to forming a layer-by-layer stacking framework with significant expansion of the interplanar spacing and surface area. The aqueous hybrid supercapacitor (AHSC) and all-solid-state hybrid supercapacitor (SSHSC) devices are fabricated using Ni-Cr-LDH-POW nanohybrid as a cathode and reduced graphene oxide (rGO) as an anode material. Notably, the NCW-2//rGO AHSC device delivers an ED of 43 Wh kg−1 at PD of 1.33 kW kg−1 and excellent electrochemical stability over 10,000 charge–discharge cycles. Moreover, NCW-2//rGO SSHSC exhibits an ED of 34 Wh kg−1 at PD of 1.32 kW kg−1 with capacitance retention of 86% after 10,000 cycles. These results highlight the excellent electrochemical functionality and advantages of the Ni-Cr-LDH-POW nanohybrids as a cathode for hybrid supercapacitors.

Original languageEnglish
Pages (from-to)548-559
Number of pages12
JournalJournal of Colloid and Interface Science
Volume616
DOIs
StatePublished - 15 Jun 2022

Keywords

  • 0D Polyoxotungstate
  • 2D Ni-Cr-LDH
  • Hybrid supercapacitor
  • Intercalation
  • Nanohybrids

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