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

Abstract

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

Maxwell-Wagner Relaxation in Ca-, Sm- and Nd-doped Ceria

“…4(b) locating at 528.9, 530.8, and 531.9 eV corresponding to lattice oxygen (LO), oxygen vacancy (VO), and chemically absorbed H2O (CO), respectively. [22][23][24][25][26][27][28][29][30][31] The doping of Ca, Sm, and Nd has created many oxygen vacancies as can be seen from the XPS spectra. The O spectra also show that CO peak due to adsorbed water is also present in all three samples, meaning that it can be used for humidity sensitivity measurements.…”

“…The reduction of permittivity in thermally treated and air-quenched samples supports the above result. [25][26][27][28] Fig. 11 shows the Cole-Cole plots of CCO, CSO and CNO at 400, 420 and 440K temperature, respectively, as it can tell the contribution of bulk and interface towards dielectric properties.…”

Pd Doped Co3O4 Loaded on Carbon Nanofibers as Highly Efficient Free-Standing Electrocatalyst for Oxygen Reduction and Oxygen Evolution Reactions

“…In contrast, recent studies demonstrate that self-supporting electrodes show excellent electrocatalytic performance which do not require coating steps, additional polymer binders, and conductive additives ( Tong et al, 2018 ; Zhang et al, 2018 ; Huang et al, 2020a ). Flexible carriers such as metal foam or other carbon based fluid collection are commonly used to obtain electrodes with mechanical strength ( Nie et al, 2018 ; Li et al, 2021 ; Yang et al, 2021b ). The introduction of additional substrates can undoubtedly increase the mechanical strength, but the compact structure of substrates inevitably leads to poor air/electrolyte permeability, thereby reducing the performance of electrodes ( Du et al, 2021 ; Song et al, 2021 ).…”

An overview of surface-enhanced Raman scattering substrates by pulsed laser deposition technique: fundamentals and applications

“…In addition, physical methods could also yield the uniformly monodisperse metallic NPs without solvent contamination. Thermal deposition [ 31 , 32 ], sputtering deposition [ 33 – 36 ], electron beam evaporation [ 37 – 39 ], and pulsed laser deposition (PLD) [ 40 – 43 ] are some of the most commonly used physical methods to produce the metallic NPs. Mechanical pressure, high-energy radiation, thermal energy, and electrical energy have been applied to generate the metallic NPs by triggering the melting, evaporation, condensation, and ablation [ 28 ].…”