Pulsed Laser Deposition of NiSe2 Film on Carbon Nanotubes for High-Performance Supercapacitor

Rongrong Nie 1

Qunlong Wang 2

Peng Sun 1

Ruijing Wang 1

Qin Yuan 1

Xuefeng Wang 1, Email

1 Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Shanghai 200092, China

2 Shanghai Joyworld Innovative Materials Technology Co. LTD, Shanghai 200433, China

Abstract

Amorphous NiSe2 was deposited on the carbon nanotubes (CNTs) networks by the pulsed laser deposition method forming the [email protected]@NiSe2 composites. The [email protected]@NiSe2 electrode exhibits a high specific capacitance of 696 F g−1 at 2 A g−1 and the specific capacitance retention of 74 % in the long life test. To evaluate the practicality of our electrode, we assembled the [email protected]@NiSe2//[email protected] asymmetric supercapacitor using [email protected]@NiSe2 as positive electrode and [email protected] as the negative electrode, which shows an energy density of 11.9 Wh kg−1 at a power density of 242 W kg−1. This work highlights the advantageous electrochemical performance of NiSe2 film on CNTs, in which the highly conductive CNTs provide plentful electronic conduction channels and the NiSe2 film exposures more active sites.

Pulsed Laser Deposition of NiSe2 Film on Carbon Nanotubes for High-Performance Supercapacitor