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A novel RGO/N-RGO supercapacitor architecture for a wide voltage window, high energy density and long-life via voltage holding tests

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Abstract

Here, we demonstrated a unique symmetric supercapacitor (SSC) device architecture based on reduced graphene oxide (RGO) and nitrogen-doped RGO (N-RGO) electrodes. The RGO/N-RGO SSC shows a wide voltage window (2.2 V), high energy density (106.3 W h kg−1), and ultra-high power density (15184.8 W kg−1). The RGO/N-RGO SSC also delivers outstanding stability of 95.5% over 10 000 galvanostatic charging–discharging tests and 90.5% over 8 h of voltage holding tests. Additionally, this work explores a better understanding of leakage current and self-discharge mechanisms, which justifies the excellent state of health of the RGO/N-RGO SSC device.

Graphical abstract: A novel RGO/N-RGO supercapacitor architecture for a wide voltage window, high energy density and long-life via voltage holding tests

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Article information


Submitted
11 Jan 2020
Accepted
21 Jan 2020
First published
22 Jan 2020

Chem. Commun., 2020, Advance Article
Article type
Communication

A novel RGO/N-RGO supercapacitor architecture for a wide voltage window, high energy density and long-life via voltage holding tests

R. K. Mishra, G. J. Choi, Y. Sohn, S. H. Lee and J. S. Gwag, Chem. Commun., 2020, Advance Article , DOI: 10.1039/D0CC00249F

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