MoS₂/Graphene Composites as Promising Materials for Energy Storage and Conversion Applications

Abstract

Energy storage devices with high performance have been extensively studied for decades due to the increasing fuel demands. The physicochemical properties of 2D materials such as MoS 2 and graphene, due to their high surface area, versatile electronic structure, high mechanical robustness, This article is protected by copyright. All rights reserved. 2 high electrical conductivity, and desirable electrochemical characteristics, make them superior candidates for energy storage applications. MoS 2 /graphene composites specially emerge as exceptional candidates that could offer new solution for energy storage applications. Many fabrication strategies to develop and synthesize MoS 2 /graphene composites have been explored and introduced, such as hydrothermal and solvothermal treatment, chemical vapor deposition, sonication, microwave and self-assembly. For these composites to be suitable for energy storage devices applications, they are often integrated with other materials such as additional agents to improve their electrochemical and stability properties. In this review, recent progresses on the development of graphene/MoS 2 composites for energy storage and conversion applications (supercapacitors, batteries, solar cells, and hydrogen evolution) is presented and discussed. Critical review and perspectives on the future directions for MoS 2 /graphene composite based energy storage devices are also presented as concluding remarks. Recent progress on the development of graphene/MoS 2 composites for energy storage applications is also presented and discussed.

Laser Synthesis and Microfabrication of Micro/Nanostructured Materials Toward Energy Conversion and Storage

“…Nanomaterials have presented a number of interesting physical and chemical properties for various applications, including energy storage and conversion [ 1 ], nanoscale electronics [ 2 ], sensors and actuators [ 3 ], photonics devices [ 4 ], and even for biomedical purposes [ 5 ]. The researches on nanomaterial synthesis have a long history, and a large number of different synthesis approaches have been performed up until now, including the wet chemical method in solution conducting environment and the thermal treatment process in gas conducting environment.…”

Electrochemical Capacitor Performance of Nanotextured Carbon/Transition Metal Dichalcogenides Composites

“…[4][5][6] 2D transition metal dichalcogenides (2D-TMDs) are promising candidates due to their layered structure, a large variety of metal-dichalcogenide combinations, and exposed active sites. [7][8][9][10][11][12] Yet, they offer moderate conductivity and stability which limits their application in long-term operating devices. So far, molybdenum disulfide (MoS 2 ) and tungsten disulfide (WS 2 ) are the most often reported as EC electrode materials.…”

Investigação >i<ab initio>/i< dos mecanismos de formação de nanoflocos de dicalcogenetos de metais de transição

“…A modificação de superfícies altera a interação entre os nanoflocos de DMTs 2D em seus estágios iniciais de formação e o substrato. O pré-tratamento de camadas de Au (111) com Se permite o crescimento de nanoflocos 1T do MoSe 2 , metaestável, contrastando com o crescimento de nanoflocos 2H em camadas de Au (111) não tratadas previamente. [64] Portanto, existe a possibilidade de formação direta através de CVD de nanoflocos que possuem o politipo metaestável do grupo 6 através da modificação dos estágios iniciais de formação dos nanoflocos.…”

“…Nanoflocos 1T de MoS 2 foram obtidos através de epitaxia por feixe molecular, [2] sugerindo que passos iniciais de formação agem de maneira determinística na obtenção de nanoflocos de politipos distintos. Esta determinação está correlacionada com o efeito de transferência eletrônica do substrato para o nanofloco, tendo sido utilizado como substrato o Au (111). A combinação entre temperatura de síntese e potencial químico de S tem papel fundamental de induzir maior transferência eletrônica do substrato para o nanofloco.…”

“…[109,110] De fato, observa-se que heterojunções formadas por MoS 2 /Gr com band-gap na região do espectro visível apresentam grande condutividade eletrônica, candidatando estes materiais híbridos para o uso em dispositivos fotovoltaicos. [111,112] Ademais, heterojunções MoS 2 /Gr encontram usos em sensores, [113,114] além do fato que a variação de hibridizações relativas, de acordo com o ângulo de rotação entre as monocamadas, produzirem comportamentos condutivos específicos (área que é conhecida como twistronics). [115,116] Os métodos mais utilizados atualmente para a síntese de heteroestruturas verticais MoS 2 /Gr, como a CVD, provêm materiais de alta qualidade e escaláveis.…”