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

Rajneesh Kumar Mishra; Gyu Jin Choi; Youngku Sohn; Seung Hee Lee; Jin Seog Gwag

doi:10.1039/d0cc00249f

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

Chem Commun (Camb). 2020 Mar 5;56(19):2893-2896. doi: 10.1039/d0cc00249f.

Authors

Rajneesh Kumar Mishra¹, Gyu Jin Choi¹, Youngku Sohn², Seung Hee Lee³, Jin Seog Gwag¹

Affiliations

¹ Department of Physics, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, South Korea. sweat3000@ynu.ac.kr.
² Department of Chemistry, Chungnam National University, Daejeon, South Korea.
³ Applied Materials Institute for BIN Convergence, Department of BIN Convergence Technology and Department of Polymer-Nano Science and Technology, Chonbuk National University, Jeonju, Jeonbuk 561-756, South Korea. lsh1@jbnu.ac.kr.

PMID: 32037426
DOI: 10.1039/d0cc00249f

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.