Lanthanum sulfide/graphene oxide composite thin films and their supercapacitor application

Abstract

In this study, graphene oxide, lanthanum sulfide and their composite thin films are prepared using simple and inexpensive chemical methods and their supercapacitive performance is evaluated. The X-ray diffraction study shows the formation of mixed-phase lanthanum sulfide with monoclinic α-LaS 2 and tetragonal La 5 S 7. Field emission scanning electron microscopy images show porous surface morphology of lanthanum sulfide and composite thin films. The supercapacitive performance of composite film tested in 1 M Na 2 SO 4 electrolyte shows highest specific capacitance of 312 F g −1 at a 5 mV s −1 scan rate.

Synthesis of In : SnO2/La4NiS7 via Diethyldithiocarbamate‐Assisted Spin Coating: A Promising Route for High‐Performance Transparent Photoelectrochemical Energy Storage and Generation

“…Lanthanum sulphide‐GO composite thin film was also tested for supercapacitor application with a specific capacitance of 312 F ⋅ g −1 at 5 mV ⋅ s −1 scan rate. Inexpensive SILAR and layer by layer method was used for the manufacturing of thinfilms [59] . In an article published by Raza et al.…”

“…Inexpensive SILAR and layer by layer method was used for the manufacturing of thinfilms. [59] In an article published by Raza et al lanthanum sulphide-rGO nanorods were synthesized. These nanorods showed good specific capacitance value of 34.12 F ⋅ g À 1 .…”

“…This exhibited that the composite thin film provided an easier way and less resistance for the intercalation/ deintercalation of charges. [59]…”

Preparation and application of rare earth sulfides

“…gare等 [65,66] 又通过SILAR法制备了氧化石墨烯/硫化镧 (记为GO/La x S y , La x S y 为LaS 2 和La 5 S 7 的混相)和氧化石 墨烯/硫化钐(记为GO/Sm 2 S 3 )复合薄膜, 并将其作为电 容器电极进行了研究. 在5 mV s 的循环性能和倍率性能的主要原因之一.…”

The electrochemical performance of electrodeposited chitosan bio-nanopolymer in non-aqueous electrolyte: a new anodic material for supercapacitor

“…In next stage, it was achieved with transition metal oxides and ferrites [4][5][6][7][8]. These transition metals were again consumed with different sulphides and phosphates to attain extreme capacitance [9][10][11].…”