http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Dhanasekar Kesavan(케사반 다나셰이커),Karthikeyan Krishnamoorthy(케이 카티케 이얀),Sindhuja Manoharan(마노하란 신드후자),Sang-Jae Kim(김상재) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.4
In this work, we investigated the electrochemical properties of boron-oxy-carbide (BOC) nanostructures prepared via simple hydrothermal assisted carbonization technique. Physico-chemical characterization such as XRD analysis confirmed the formation of BOC nanostructures with the presence of boron suboxides confined in carbon matrix. The field-emission scanning electron microscopic analysis coupled with EDX analysis reveals the formation of cone-like BOC nanostructure with uniform distribution of boron, oxygen, and carbon elements. The electrochemical properties of the BOC electrode are investigated in aqueous electrolyte (1M Li<sub>2</sub>SO<sub>4</sub>), which shows enhanced operating potential of 2.0 V (-1.0 to 1.0 V). The CV shows quasi rectangular shaped profiles at all scan rates portraying the charge storage is due to combination of electric double layer and intercalation capacitance occurred at BOC electrode. The BOC electrode possess a high specific capacitance of 230.5 F g<sup>-1</sup> at a constant current of 1 mA with better electrochemical stability. Benefiting from the unique structural features and embedment of free carbon phase, the BOC nanostructures exhibits excellent electrochemical properties compared to the state of art of supercapacitors.
Parthiban Pazhamalai(파자말라이 파르티반),Karthikeyan Krishnamoorthy(케이 카티케 이얀),Sindhuja Manoharan(마노하란 신드후자),Sang-Jae Kim(김상재) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.4
Self-charging supercapacitor power cell (SCSPC) is one of the nascent areas of research for the surrogating to renewable energy resources. The prime obstacle in development SCSPC is the utilization of liquid electrolyte hinders the energy conversion efficiency which in turn creates a demand to explore and replace with new solid electrolytes for the SCSPCs. Herein, a new all solid state self-charging supercapacitor power cell (SCSPC) has been fabricated using Nafion as solid polyelectrolyte cum energy harvester and spray coated MoS2 quantum sheets (MoS2-QSs) as energy storage electrodes. The Nafion polyelectrolyte exhibits energy harvesting characteristics under mechanical deformation due to the change in ion concentration gradients between electrodes that leads to the generation of output voltage. The fabricated MoS2-Nafion-MoS2 SCSPC shows the self-charging characteristics upon various levels of compressive forces with a self-charging voltage of 243 mV. The self-charging mechanism of the fabricated MoS2-Nafion-MoS2 SCSPC is explained via piezo-ionic effect. These experimental findings have profound significance in the context of developing a potential all-in-one self-charging system.
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.