Graphene/transition metal dichalcogenides hybrid supercapacitor electrode: status, challenges, and perspectives

Abstract

Supercapacitors, based on fast ion transportation, are among the most promising energy storage solutions that can deliver fast charging-discharging within seconds and exhibit excellent cycling stability. The development of a good electrode material is one of the key factors in enhancing supercapacitor performance. Graphene (G), an allotrope of carbon that consists of a single layer of carbon atoms arranged in a hexagonal lattice, elicits research attention among scientists in the field of energy storage due to its remarkable properties, such as outstanding electrical conductivity, good chemical stability, and excellent mechanical behavior. Furthermore, numerous studies focus on 2D materials that are analogous to graphene as electrode supercapacitors, including transition metal dichalcogenides (TMDs). Recently, scientists and researchers are exploring TMDs because of the distinct features that make 2D TMDs highly attractive for capacitive energy storage. This study provides an overview of the structure, properties, synthesis methods, and electrochemical performance of G/TMD supercapacitors. Furthermore, the combination of G and TMDs to develop a hybrid structure may increase their energy density by introducing an asymmetric supercapacitor system. We will also discuss the future prospect of this system in the energy field.

Two‐Dimensional Siloxene–Graphene Heterostructure‐Based High‐Performance Supercapacitor for Capturing Regenerative Braking Energy in Electric Vehicles

“…[36] The CD profiles of the fabricated SSCs (Figure 5a) recorded using an applied current of 1 mA reveal that the amount of charge storage is in the order of siloxene < rGO < siloxene-rGO SSC due to the 2D/2D heterostructures. [37,38] Figure S16, Supporting Information, presents the CD profiles of the bare siloxene and rGO SSCs. The CD profiles ( Figure 5b) using a current of 2 mA show a symmetric triangular-shaped nature, which was retained even at higher current ranges ( Figure 5c) and shows the improved capacitive properties of the siloxene-rGO SSC.…”

Preparation of ball‐flower‐like MoS 2 as a superior electrode for pseudocapacitor

“…Compared to the acidic and neutral electrolyte, the redox peaks in CV become evident in alkaline solution, which could be due to the predominant intercalation reaction in high‐concentration alkaline solution and the detailed reason is still unclear. The insertion/extraction of K + ions gives rise to the prominent redox peaks in CV curves [3, 19, 20]. Moreover, the high reversibility of the insertion/extraction process can be demonstrated by the nearly symmetrical redox peaks.…”

“…In recent years, layered transition metal dichalcogenides (LTMDs) such as MoS 2 have been extensively investigated as an active material for supercapacitors because of its unique layered structure and large surface area. MoS 2 was reported to be able to demonstrate an EDL capacitive property and a pseudocapacitance from the surface redox reaction and intercalation of the ions into its layers [3][4][5][6]. The type of mechanism involved in every electrode-electrolyte system is distinctive, depending upon the choice of electrolyte, the microstructure of electrode as well as the operating voltage window of the system.…”

Analisis Termodinamika Molekul Magnesium Sulphate (MgSO4)

“…Besarnya konduktivitas ini ditentukan oleh jumlah konsentrasi elektrolit. Energi listrik dapat ditransfer melalui materi berupa hantaran yang bermuatan listrik yang berwujud arus listrik yang berarti bahwa harus ada pembawa muatan listrik di dalam materi serta adanya gaya yang menggerakkan pembawa muatan tersebut (227)(228)(229)(230)(231) . Pembawa muatan dapat berupa elektron atau dapat juga digunakan ion positif dan ion negatif dalam larutan elektrolit dan leburan garam (232) .…”