[논문]2차원 이황화몰리브덴의 성질, 제조 및 에너지 저장 소자 응용

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doi:10.14478/ace.2019.1016

2차원 이황화몰리브덴의 성질, 제조 및 에너지 저장 소자 응용
Properties, Preparation, and Energy Storage Applications of Two-dimensional Molybdenum Disulfide 원문보기

공업화학 = Applied chemistry for engineering, v.30 no.2, 2019년, pp.133 - 140

Abstract ▼ AI-Helper

Two-dimensional (2D) ultrathin molybdenum dichalcogenides $MoS_2$ has gained a great deal of attention in energy conversion and storage applications because of its unique morphology and property. The 2D $MoS_2$ nanosheets provide a high specific surface area, 2D charge channel, sub-nanometer thickness, and high conductivity, which lead to high electrochemical performances for energy storage devices. In this paper, an overview of properties and synthetic methods of $MoS_2$ nanosheets for applications of supercapacitors and rechargeable batteries is introduced. Different phases triangle prismatic 2H and metallic octahedral 1T structured $MoS_2$ were characterized using various analytical techniques. Preparation methods were focused on top-down and bottom-up approaches, including mechanical exfoliation, chemical intercalation and exfoliation, liquid phase exfoliation by the direct sonication, electrochemical intercalation exfoliation, microwave-assisted exfoliation, mechanical ball-milling, and hydrothermal synthesis. In addition, recent applications of supercapacitors and rechargeable batteries using $MoS_2$ electrode materials are discussed.

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표/그림 (3)

그림 Figure 1. Schematic illustration of exfoliation of MoS₂ using alkali metals as intercalants and post-treatments of sonication and ball milling methods.
그림 Figure 2. Schematic illustration of adsorption of CO₂ on the singlelayer MoS₂ and TEM image of 1T and 2H phases of MoS₂ sheet (Reprinted with permission form ref. 42. Copyright (2016) American Chemical Society).
그림 Figure 3. (a) Cyclic voltammograms of various solutions. (b)~(e) Schematic illustrations for the evolution process of the 1T phase based on Mo (Reprinted with permission form ref. 46. Copyright (2017) American Chemical Society).

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이론/모형

The controlled morphology of conducting polymer/MoS₂ composite electrodes showed enhanced electrochemical performances for supercapacitor applications. The Mn₃O₄ was incorporated into MoS₂ using a hydrothermal and chemical precipitation method. This hybrid electrode showed a high specific capacitance of 119.
Among them, MoS₂ has been attracted a great deal of attention for development of supercapacitors because of its high theoretical capacitance value and unique structural properties of MoS₂. The porous MoS₂ thin films were prepared by Choudhary and coworkers based on a direct magnetron sputtering method[47]. The MoS₂ film electrode showed a high gravimetric capacitance of 330 F/g at 10 V/s (high rate capability) and a good cycling stability of 97% retention over 5,000 cycles of charging/discharging measurement.

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