Construction of 3D CrN@nitrogen-doped carbon nanosheet arrays by reactive magnetron sputtering for the free-standing electrode of supercapacitor

Xun Xu; Songyang Chang; Zhuozheng Hong; Ye Zeng; Hao Zhang; Ping Li; Shizheng Zheng; Zhoucheng Wang; Shuwang Duo

doi:10.1088/1361-6528/ac3356

Construction of 3D CrN@nitrogen-doped carbon nanosheet arrays by reactive magnetron sputtering for the free-standing electrode of supercapacitor

Nanotechnology. 2021 Nov 12;33(5). doi: 10.1088/1361-6528/ac3356.

Authors

Xun Xu^{1

2}, Songyang Chang^{1

2}, Zhuozheng Hong^{1

2}, Ye Zeng³, Hao Zhang^{1

2}, Ping Li^{1

2}, Shizheng Zheng^{1

2}, Zhoucheng Wang³, Shuwang Duo^{1

2}

Affiliations

¹ Jiangxi Key Laboratory of Surface Engineering, Jiangxi Science and Technology Normal University, Nanchang, 330013, People's Republic of China.
² School of Materials and Mechanical & Electrical Engineering, Jiangxi Science and Technology Normal University, Nanchang, 330013, People's Republic of China.
³ College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, People's Republic of China.

PMID: 34700302
DOI: 10.1088/1361-6528/ac3356

Abstract

Owing to their favorable chemical stabilities and electronic conductivities, transition metal nitrides (TMNs) have been targeted as the potential electrode materials for the supercapacitors. Herein, 3D CrN@nitrogen-doped carbon nanosheet arrays (NCs) were successfully deposited on carbon paper (CP) by reactive magnetron sputtering method. The CrN@NCs@CP electrode exhibited satisfactory electrochemical properties: initially, the electrode showed a 132.1 mF cm^-2specific capacitance at 1.0 mA cm^-2current density; subsequently, the electrode demonstrated a 95.9% capacitance retention after 20 000 galvanostatic charge-discharge cycles at 5.0 mA cm^-2current density. The specific capacitance of the CrN@NCs@CP electrode was significantly higher than that of the CrN@CP electrode (4.1 mF cm^-2at 1.0 mA cm^-2). Furthermore, the symmetric supercapacitor that incorporated two CrN@NCs@CP electrodes demonstrated 5.28μWh cm^-2(2.7 Wh kg^-1) energy density at 0.41 mW cm^-2power density. These findings exemplify the suitability of the 3D composite electrodes of TMNs for energy storage application.

Keywords: magnetron sputtering; metal–organic frameworks; nanosheet arrays; symmetric supercapacitor; transition metal nitride.