NANO MATERIALS AND SYSTEM LABORATORY 9 SELF-POWERED SYSTEMS (SPS) Energy conversion/harvesting and electrochemical storage device are the two critical aspects of providing sustainable power sources for gadgets, but they are two independent units with distinct working mechanism. The concept of integrating energy harvesting and storage devices in a single system without the power management circuit (PMC) and the so-called self-powered system (SPS) is a relatively novel concept developed for maintenance-free smart gadgets. Among the various energy harvesting techniques, triboelectric nanogenerator (TENG) has attracted much attention due to its unique advantages of high energy output (voltage/current), lightweight, ease to construct, and vast material choice. However, TENG delivers a pulsed output, making them unsuitable for driving smart gadgets. Therefore, the output of TENG can be stored in energy storage devices and can be used to drive gadgets for which SPSs need to be formulated. Considering the energy storage devices such as supercapacitors (SCs) are promising candidates due to their merits, such as lightweight, moderate energy/maximal power density, rapid charging/discharging, and long-run cycle life. To reduce the manufacturing cost (in terms of materials) for SPSs, it is desirable to develop unique materials that harvest and store energy. To contribute to this research, we have explored the few bifunctional properties of low dimensional materials (MoS2 quantum sheets, Antimonene, and carbyne) for a zero-maintenance system.
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