Journal
NANO ENERGY
Volume 74, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2020.104882
Keywords
Microarchitectured silkworm fibroin film; Triboelectric nanogenerators; Distance-dependent electric field; Alcohol annealing treatment; Self-powered electronic system
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Funding
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2017H1D8A2031138, 2018R1A6A1A03025708]
- EPSRC UK [EP/S02106X/1]
- EPSRC [EP/S02106X/1] Funding Source: UKRI
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Triboelectric nanogenerators (TENGs) developed using eco-friendly natural materials instead of traditional electronic materials are more favorable for biocompatible applications, as well as from a sustainable life-cycle analysis perspective. Microarchitectured silkworm fibroin films with high surface roughness and an outstanding ability to lose electrons are used to design TENGs. An alcohol-annealing treatment is utilized to strengthen the resistance of the silk film (SF) against humidity and aqueous solubility. Herein, for the first time, the distance-dependent electric field theoretical model is employed to optimize the TENG parameters to achieve high output, which shows excellent agreement with the experimental outputs of SF-based TENG. The alcohol- treated microarchitectured SF (AT-MASF) with a polytetrafluoroethylene positive contact exhibits a stable and high electrical output even in harsh environments. These studies can lead us closer to the attractive future vision of realizing biodegradable TENG systems for harness/sensing various biomechanical activities even under real/ humid environments. The potential and real-time application of the proposed AT-MASF-based TENG is demonstrated by directly employing its electric power to drive a number of low-power portable electronics and for sensing in human-body centric activities.
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