Journal
NANO ENERGY
Volume 31, Issue -, Pages 302-310Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2016.11.025
Keywords
Triboelectric nanogenerator; Power management; Energy harvesting; Self-powered system
Categories
Funding
- Hightower Chair foundation
- 'thousands talents' program for pioneer researcher and his innovation team, China
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Triboelectric nanogenerator (TENG) has the output characteristics of high voltage but low current/chargetransfer, making its low efficiency in powering most of electronics. To address this problem, power management circuits consisting of coupled inductors or transformers are usually employed. Here we report an inductor-free, auto-power-management design based on automatic switches between serial-connected and parallel-connected capacitors in a rationally designed manner, so that the output voltage can be lowered and the output charge is enhanced in proportion. In conjunction to theoretical analysis, a TENG along with proof-of-concept power management units as automatically driven by the triggering motion for TENG is fabricated, which improves the rate for charging a supercapacitor by 5 times. Compared to previous work, this power-management design shows advantages of capability for harvesting low power/frequency scale energy, high scalability, and light weight, which paves a new approach for achieving high-efficient portable TENG-based self-powered system.
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