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Issue 3, 2020
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A polypyrrole-adorned, self-supported, pseudocapacitive zinc vanadium oxide nanoflower and nitrogen-doped reduced graphene oxide-based asymmetric supercapacitor device for power density applications

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Abstract

Herein, a distinctive approach has been implemented for exploiting a typical battery material zinc vanadium oxide (ZV) as a supercapacitor electrode material. Aiming to achieve fascinating capacitive properties, a hybrid (ZnV2O6@PPy) of the conducting polymer polypyrrole (PPy)-decorated ZV was synthesized via a hydrothermal protocol, followed by low-temperature in situ oxidative polymerization. The hybrid electrode ZnV2O6@PPy (ZVP) benefited from its interconnecting network architecture, mesoporous feature, conductive feature, and rich redox chemistry, which contributed to the charge storage performance to ensure a remarkable specific capacitance (Cs) of 723.6 F g−1 at 1 A g−1 current density that outweighed the Cs of ZV at 402 F g−1. Moreover, an asymmetric supercapacitor (ASC) device (based on ZnV2O6@PPy as the positive electrode and the nitrogen-doped reduced graphene oxide (NG) as the negative electrode) delivered a maximum Cs of 109.2 F g−1 at 1 A g−1 within an impressive voltage window of 0–1.5 V. The ASC provided a maximum energy density of 34 W h kg−1 at a power density of 748.7 W kg−1, maintaining a reliable cycle life of 93% over 3000 galvanostatic charge–discharge cycles. Two serially associated ASC devices can power up the red LED indicator for quite a long time. The comprehensive experimental output of the ASC supports the promising application of the device as a supercapacitor electrode application.

Graphical abstract: A polypyrrole-adorned, self-supported, pseudocapacitive zinc vanadium oxide nanoflower and nitrogen-doped reduced graphene oxide-based asymmetric supercapacitor device for power density applications

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Article information


Submitted
06 Nov 2019
Accepted
09 Dec 2019
First published
09 Dec 2019

New J. Chem., 2020,44, 1063-1075
Article type
Paper

A polypyrrole-adorned, self-supported, pseudocapacitive zinc vanadium oxide nanoflower and nitrogen-doped reduced graphene oxide-based asymmetric supercapacitor device for power density applications

L. Halder, A. Kumar Das, A. Maitra, A. Bera, S. Paria, S. K. Karan, S. K. Si, S. Ojha, A. De and B. B. Khatua, New J. Chem., 2020, 44, 1063
DOI: 10.1039/C9NJ05546K

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