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Highly Efficient MoS₂ Quantum Sheets Based Interdigital Micro-supercapacitors
Swapnil Shital Nardekar(나데카 스와프닐),Karthikeyan Krishnamoorthy(케이 카티케 이얀),Parthiban Pazhamalai(파자말라이 파르티반),Sang-Jae Kim(김상재) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.4
The development of power source-integrated microelectronics has stimulated the urgent demand for microscale-based energy storage devices with multiple innovative forms such as high energy density, tailored capacitance and shape diversity for microscale power sources to microelectronics. Herein, we demonstrate a facile and cost-effective method to fabricate MoS<sub>2</sub> quantum sheets-based planer micro-supercapacitors (MoS<sub>2</sub> QSs MSC) via a single-step laser engraving process. The electrochemical analysis of MoS<sub>2</sub> QSs MSC indicated their superior charge storage properties with a high device capacitance, energy density and long cycle life. Furthermore, we highlight the fabrication of MSC with shape diversity and performance uniformity via construction in several designable shapes, which exhibit superior electrochemical performances. Overall, this work creates a way for scalable fabrication of microscale-based supercapacitors, with shape diversity for next generation integrated power source and digitization of the fashion industry.
Highly efficient MoS₂ quantum sheets for next generation self-charging power cell
Swapnil Shital Nardekar,Karthikeyan Krishnamoorthy,Sang-Jae Kim 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
The development of self-charging power cell (SCPC) can be a potential candidate for solving the problem of supplying power to microelectronics devices. Herein, we focus on the designing and development of portable and wearable self-charging power cell via utilizing the 1TMoS₂ QSs as an energy harvesting and storage material. The fabricated MoS₂ quantum sheets-based planer micro-supercapacitors (MoS₂ QSs MSC) via a single-step laser engraving process indicated superior energy density, tailored capacitance and exceptional shape diversity aptitude. Again, triboelectric nanogenerator introduced with 1T-MoS₂ QSs based charge trapping/blocking layer enhances the output voltages and power density of TENG significantly, which is 13-fold higher than that of pristine TENG. Furthermore, we have fabricated all in one MoS₂ based SCPC which showed their superior self-charging ability up to 1.1V externally, Overall, this work creates a way for developing highly efficient next generation battery free wearable and portable electronics.
Mariappan, Vimal Kumar,Krishnamoorthy, Karthikeyan,Pazhamalai, Parthiban,Sahoo, Surjit,Nardekar, Swapnil Shital,Kim, Sang-Jae Elsevier 2019 Nano energy Vol.57 No.-
<P><B>Abstract</B></P> <P>An essential way to enhance the energy density of a supercapacitor(SC) is to use high capacitance electrode materials via developing binder-free electrode with porous and hierarchical nanostructures. Herein, we demonstrated the use of copper antimony sulfide (Cu<SUB>3</SUB>SbS<SUB>4</SUB>) nanowires directly grown on Ni foam (using a microwave-irradiation process) as a binder-free positive electrode for SCs. The growth mechanism, effect of microwave irradiation time on the morphology and electrochemical properties of Cu<SUB>3</SUB>SbS<SUB>4</SUB> on Ni foam were discussed in detail. The cyclic voltammetric studies (using three-electrode test) of Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni-5 electrode showed the presence of Type-C battery-like charge-storage properties. The Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni-5 electrode delivered a high specific capacity (835.24 mA h g<SUP>−1</SUP>) as obtained from the charge-discharge analysis (at a current density of 2.5 mA cm<SUP>−2</SUP>). Further, the device specific properties of the Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni-5 positive electrode was examined via fabricating asymmetric supercapacitors (ASCs) using two different negative electrodes viz. (i) planar-graphene, and (ii) binder-free copper molybdenum sulfide anchored on Ni foam (Cu<SUB>2</SUB>MoS<SUB>4</SUB>/Ni) electrodes, respectively. The electrochemical analyses of the fabricated ASCs revealed that the Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni-5║Cu<SUB>2</SUB>MoS<SUB>4</SUB>/Ni ASC possess almost 3.0-fold higher energy density compared to the Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni-5║graphene ASC. The Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni-5║Cu<SUB>2</SUB>MoS<SUB>4</SUB>/Ni ASC delivered a high specific device capacitance of 213.6 F g<SUP>−1</SUP> with a remarkable energy density (58.15 Wh kg<SUP>−1</SUP>), maximum power density (6363.63 W kg<SUP>−1</SUP>), and better cycle-life. The use of two different binder-free electrodes in the Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni-5║Cu<SUB>2</SUB>MoS<SUB>4</SUB>/Ni ASC results in their superior performance metrics over the reported ASCs, thus, highlighting their potential applications towards next-generation supercapacitors.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Cu<SUB>3</SUB>SbS<SUB>4</SUB> nanowires were directly grown on Ni foam via microwave irradiation process. </LI> <LI> Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni and Cu<SUB>2</SUB>MoS<SUB>4</SUB>/Ni electrode are used as positrode and negatrode for ASC. </LI> <LI> Charge storage mechanism of Cu<SUB>3</SUB>SbS<SUB>4</SUB>/Ni and Cu<SUB>2</SUB>MoS<SUB>4</SUB>/Ni electrodes are discussed. </LI> <LI> Merits of binder-free electrode over planar-type electrode for ASC is demonstrated. </LI> <LI> Use of two binder free electrode in ASC results in high energy and power density. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>