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

doi:10.1016/j.jcis.2022.02.091

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

J Colloid Interface Sci. 2022 Jun 15:616:548-559. doi: 10.1016/j.jcis.2022.02.091. Epub 2022 Feb 21.

Affiliations

¹ Centre for Interdisciplinary Research, D. Y. Patil Education Society, Deemed to be University, Kolhapur 416 006, India.
² Department of Polymer Science and Engineering, Department of IT-energy convergence (BK21 FOUR), Korea National University of Transportation, Chungju 380-702, South Korea.
³ Division of Physics and Semiconductor Science, Dongguk University, Seoul 04620, South Korea.
⁴ Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, The University of Newcastle, University Drive, Callaghan, NSW 2308, Australia.
⁵ Centre for Interdisciplinary Research, D. Y. Patil Education Society, Deemed to be University, Kolhapur 416 006, India. Electronic address: jlgunjakar.cir@dypgroup.edu.in.

PMID: 35228050
DOI: 10.1016/j.jcis.2022.02.091

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.

Keywords: 0D Polyoxotungstate; 2D Ni-Cr-LDH; Hybrid supercapacitor; Intercalation; Nanohybrids.