Abstract
The smart healthcare devices connected with the internet of things (IoT) for medical services can obtain physiological data of risk patients and communicate these data in real-time to doctors and hospitals. These devices require power sources with a sufficient lifetime to supply them energy, limiting the conventional electrochemical batteries. Additionally, these batteries may contain toxic materials that damage the health of patients and environment. An alternative solution to gradually substitute these electrochemical batteries is the development of triboelectric energy harvesters (TEHs), which can convert the kinetic energy of ambient into electrical energy. Here, we present the fabrication of a TEH formed by a stainless steel substrate (25 mm × 15 mm) coated with a molybdenum disulfide (MoS2) film as top element and a polydimethylsiloxane (PDMS) film deposited on indium tin oxide coated polyethylene terephthalate substrate (PET/ITO). This TEH has a generated maximum voltage of 2.3 V and maximum output power of 112.55 μW using a load resistance of 47 kΩ and a mechanical vibration to 59.7 Hz. The proposed TEH could be used to power potential smart healthcare devices.
Highlights
The smart healthcare devices connected to internet of things (IoT) can be used for continuous monitoring of the health of patients [1,2,3,4]
The triboelectric energy harvesters (TEHs) have important advantages to be used in smart healthcare devices, including flexible and wearable materials, simple design, low cost and easy fabrication process
We propose a TEH composed by a top film of stainless steel/molybdenum disulfide (MoS2 ) and bottom film of polydimethylsiloxane (PDMS)
Summary
The smart healthcare devices connected to internet of things (IoT) can be used for continuous monitoring of the health of patients [1,2,3,4]. Novel wearable devices are demanding power between 1 and 100 μW in function of their size and electronic components [19] These devices are powered using conventional electrochemical batteries that have a limited operation time and may contain some toxic materials [20]. The triboelectric energy harvesters (TEHs) have important advantages to be used in smart healthcare devices, including flexible and wearable materials, simple design, low cost and easy fabrication process. On the other hand, Ahmed et al [28] developed a flexible and stretchable selfpowered keyboard TEH based on urethane, silicone rubbers and carbon nanotubes (CNTs) This keyboard TEH can generate up to 2.5 V and a maximum output power of 0.3 μW. With substrate of tin-doped indium oxide (ITO) coated polyethylene terephthalate (PET)
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