Electrochemically driven mechanical energy harvesting
Efficient mechanical energy harvesters enable various wearable devices and auxiliary energy supply. Here we report a novel class of mechanical energy harvesters via stress–voltage coupling in electrochemically alloyed electrodes. The device consists of two identical Li-alloyed Si as electrodes, sepa...
| Main Authors: | , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Nature Publishing Group
2016
|
| Online Access: | http://hdl.handle.net/1721.1/101726 https://orcid.org/0000-0002-7959-8249 https://orcid.org/0000-0003-3087-2291 https://orcid.org/0000-0002-7841-8058 |
| _version_ | 1826205490939428864 |
|---|---|
| author | Kim, Sangtae Choi, Soon Ju Zhao, Kejie Yang, Hui Gobbi, Giorgia Zhang, Sulin Li, Ju |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Kim, Sangtae Choi, Soon Ju Zhao, Kejie Yang, Hui Gobbi, Giorgia Zhang, Sulin Li, Ju |
| author_sort | Kim, Sangtae |
| collection | MIT |
| description | Efficient mechanical energy harvesters enable various wearable devices and auxiliary energy supply. Here we report a novel class of mechanical energy harvesters via stress–voltage coupling in electrochemically alloyed electrodes. The device consists of two identical Li-alloyed Si as electrodes, separated by electrolyte-soaked polymer membranes. Bending-induced asymmetric stresses generate chemical potential difference, driving lithium ion flux from the compressed to the tensed electrode to generate electrical current. Removing the bending reverses ion flux and electrical current. Our thermodynamic analysis reveals that the ideal energy-harvesting efficiency of this device is dictated by the Poisson’s ratio of the electrodes. For the thin-film-based energy harvester used in this study, the device has achieved a generating capacity of 15%. The device demonstrates a practical use of stress-composition–voltage coupling in electrochemically active alloys to harvest low-grade mechanical energies from various low-frequency motions, such as everyday human activities. |
| first_indexed | 2024-09-23T13:13:57Z |
| format | Article |
| id | mit-1721.1/101726 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:13:57Z |
| publishDate | 2016 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | mit-1721.1/1017262022-10-01T13:54:26Z Electrochemically driven mechanical energy harvesting Kim, Sangtae Choi, Soon Ju Zhao, Kejie Yang, Hui Gobbi, Giorgia Zhang, Sulin Li, Ju Massachusetts Institute of Technology. Department of Materials Science and Engineering Massachusetts Institute of Technology. Department of Mechanical Engineering Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Kim, Sangtae Choi, Soon Ju Zhao, Kejie Gobbi, Giorgia Li, Ju Efficient mechanical energy harvesters enable various wearable devices and auxiliary energy supply. Here we report a novel class of mechanical energy harvesters via stress–voltage coupling in electrochemically alloyed electrodes. The device consists of two identical Li-alloyed Si as electrodes, separated by electrolyte-soaked polymer membranes. Bending-induced asymmetric stresses generate chemical potential difference, driving lithium ion flux from the compressed to the tensed electrode to generate electrical current. Removing the bending reverses ion flux and electrical current. Our thermodynamic analysis reveals that the ideal energy-harvesting efficiency of this device is dictated by the Poisson’s ratio of the electrodes. For the thin-film-based energy harvester used in this study, the device has achieved a generating capacity of 15%. The device demonstrates a practical use of stress-composition–voltage coupling in electrochemically active alloys to harvest low-grade mechanical energies from various low-frequency motions, such as everyday human activities. National Science Foundation (U.S.) (CBET-1240696) Samsung Scholarship Foundation Kwanjeong Educational Foundation 2016-03-16T23:45:18Z 2016-03-16T23:45:18Z 2016-01 2015-03 Article http://purl.org/eprint/type/JournalArticle 2041-1723 http://hdl.handle.net/1721.1/101726 Kim, Sangtae, Soon Ju Choi, Kejie Zhao, Hui Yang, Giorgia Gobbi, Sulin Zhang, and Ju Li. “Electrochemically Driven Mechanical Energy Harvesting.” Nat Comms 7 (January 6, 2016): 10146. https://orcid.org/0000-0002-7959-8249 https://orcid.org/0000-0003-3087-2291 https://orcid.org/0000-0002-7841-8058 en_US http://dx.doi.org/10.1038/ncomms10146 Nature Communications Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Nature Publishing Group Nature Publishing Group |
| spellingShingle | Kim, Sangtae Choi, Soon Ju Zhao, Kejie Yang, Hui Gobbi, Giorgia Zhang, Sulin Li, Ju Electrochemically driven mechanical energy harvesting |
| title | Electrochemically driven mechanical energy harvesting |
| title_full | Electrochemically driven mechanical energy harvesting |
| title_fullStr | Electrochemically driven mechanical energy harvesting |
| title_full_unstemmed | Electrochemically driven mechanical energy harvesting |
| title_short | Electrochemically driven mechanical energy harvesting |
| title_sort | electrochemically driven mechanical energy harvesting |
| url | http://hdl.handle.net/1721.1/101726 https://orcid.org/0000-0002-7959-8249 https://orcid.org/0000-0003-3087-2291 https://orcid.org/0000-0002-7841-8058 |
| work_keys_str_mv | AT kimsangtae electrochemicallydrivenmechanicalenergyharvesting AT choisoonju electrochemicallydrivenmechanicalenergyharvesting AT zhaokejie electrochemicallydrivenmechanicalenergyharvesting AT yanghui electrochemicallydrivenmechanicalenergyharvesting AT gobbigiorgia electrochemicallydrivenmechanicalenergyharvesting AT zhangsulin electrochemicallydrivenmechanicalenergyharvesting AT liju electrochemicallydrivenmechanicalenergyharvesting |