Abstract
Advances in piezoelectric or triboelectric materials have enabled high-frequency platforms for mechanical energy harvesting (>10 Hz); however, virtually all human motions occur below 5 Hz and therefore limits application of these harvesting platforms to human motions. Here we demonstrate a device configuration based on sodiated black phosphorus nanosheets, or phosphorene, where mechanoelectrochemical stress-voltage coupling in this material is capable of efficient energy harvesting at frequencies as low as 0.01 Hz. The harvester is tested using both bending and pressing mechanical impulses with peak power delivery of 42 nW/cm2 and total harvested energy of 0.203 μJ/cm2 in the bending mode and 9 nW/cm2 and 0.792 μJ/cm2 in the pressing mode. Our work broadly demonstrates how 2D materials can be effectively leveraged as building blocks in strategies for efficient electrochemical strain energy harvesting.
| Original language | English |
|---|---|
| Pages (from-to) | 1797-1803 |
| Number of pages | 7 |
| Journal | ACS Energy Letters |
| Volume | 2 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 11 2017 |
| Externally published | Yes |
Funding
The authors would like to thank Adam Cohn, Keith Share, Anna Douglas, Kate Moyer, and Deanna Schauben for useful insights and discussions. We would also like to acknowledge Rizia Bardhan for use of Raman facilities. This work was supported in part by the Vanderbilt University discovery grant program, NSF Grant CMMI 1400424, and R.C. was supported by a fellowship through the Vanderbilt Institute for Nanoscale Science and Engineering.