Simultaneously harvesting mechanical and chemical energies by a hybrid cell for self-powered biosensors and personal electronics

Ya Yang, Hulin Zhang, Jun Chen, Sangmin Lee, Te-Chien Hou, Zhong Lin Wang
2013 Energy & Environmental Science  
Electrochemical cells (ECs) are devices that convert chemical energy into electricity through spontaneous oxidation-reduction reactions that occur separately at two electrodes through the transport of protons in the electrolyte solution and the flow of electrons in the external circuit. A triboelectric nanogenerator (TENG) is an effective device that converts mechanical energy into electricity using organic/polymer materials by a contact induced electrification process followed by charge
more » ... ed by charge separation. In this paper, we demonstrate the first integration of an EC and a TENG for simultaneously harvesting chemical and mechanical energy, and its application for powering a sensor and even personal electronics. An EC was fabricated using a Cu/NaCl solution/Al structure, on which a thin polydimethylsiloxane (PDMS) film with a micropyramid surface structure was used as the protection layer of the EC for anti-corrosion, anti-contamination and anti-mechanical damage. A TENG was fabricated based on a contact-and-separation process between the PDMS protection layer and the Al electrode layer of the EC. The output performance of the TENG can be increased by embedding BaTiO 3 nanoparticles into the PDMS film layer to enhance the dielectric property. Moreover, we also demonstrated that the produced hybrid energies can be stored in a Li-ion battery for lighting up 30 green LEDs. † Electronic supplementary information (ESI) available: Additional gures include the photograph of the fabricated hybrid energy cell, the SEM image of the Si micropyramid template, cross-sectional SEM image of the fabricated PDMS lm, XRD patterns of BaTiO 3 nanoparticles, the measured output voltage and current density of the composite lm, the enlarged output current of the electrochemical cell, the schematic diagram of the self-powered H 2 O 2 biosensor, photograph of the biosensor, SEM image of the fabricated Pt electrode, and the enlarged discharging curve of the Li-ion battery. See
doi:10.1039/c3ee40764k fatcat:miaguv63urgwjbze3jcdyvrgfq