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Superhighway channels of nickel ferrite doped Polyaniline nanocomposites for a high-performance stable symmetric pseudo-supercapacitor
  • Samina Husain,
  • Gyan Singh,
  • Yogesh Kumar
Samina Husain
Jamia Millia Islamia

Corresponding Author:[email protected]

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Gyan Singh
Jamia Millia Islamia
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Yogesh Kumar
University of Delhi
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Abstract

The electrochemical performance of Polyaniline (PANI) can be significantly improved due to the incorporation of spinel-type transition metal oxide, i.e., 1 wt. % of Nickel Ferrite (NiFe 2O 4) into the PANI matrix. In this report, we have synthesised NiFe 2O 4 (NF), PANI1:1 ratio, PANI1:2 ratio, and PANI/NiFe 2O 4 nanocomposites, i.e., PANI1:1/NF1 and PANI1:2/NF2 nanocomposites by in-situ oxidative polymerization method. The conducting network formed in the nanocomposite significantly increases the multiple valence states of the metal for the electrolytic ions. The PANI/NiFe 2O 4 nanocomposite shows good interaction and was confirmed by Fourier Transform Infra-red Spectroscopy (FTIR) and Raman analysis. The SEM analysis reveals a uniformly porous and agglomerated globular morphology of the nanocomposite. Also, the PANI/NiFe 2O 4 composite (PANI1:1/NF1) exhibits enhanced supercapacitive properties due to improve strong conducting path of PANI, which helps to provide the delocalization of the electrons in the polymeric chain. The highest specific capacitance ~ 758 Fg -1 is achieved for PANI 1:1/NF1 sample as compared to bare PANI1:1 (677 Fg -1), PANI1:2 (500 Fg -1), NF (253 Fg -1) and other PANI1:2/NF2 (686 Fg -1) samples at 10 mV/s scan rate in a two-electrode system due to NF nanoparticles filling the vacant places in the polymeric matrix. The energy density (54 Whkg -1), power density (1705 Wkg -1) and good cycling stability approx. 97 % after 10000 GCD cycles of the device is found for PANI1:1/NF1. The EIS studies further confirm that the PANI 1:1/NF1 device has a lower charge transfer resistance (R ct) ~ 0.35 Ohm in comparison to other fabricated devices. It seems that NiFe 2O 4 acts as a “superhighway” for charge transportation between PANI which is beneficial for supercapacitors.
03 Apr 2023Review(s) Completed, Editorial Evaluation Pending
03 Apr 2023Submitted to Energy Storage
04 Apr 2023Submission Checks Completed
04 Apr 2023Assigned to Editor
09 Apr 2023Reviewer(s) Assigned
09 Apr 2023Reviewer(s) Assigned
27 Jun 2023Editorial Decision: Revise Major
28 Jul 20231st Revision Received
28 Jul 2023Review(s) Completed, Editorial Evaluation Pending
28 Jul 2023Submission Checks Completed
28 Jul 2023Assigned to Editor
02 Aug 2023Reviewer(s) Assigned
02 Aug 2023Reviewer(s) Assigned
16 Sep 2023Editorial Decision: Accept