Spray printing of self-assembled porous structures for high power battery electrodes
A novel, generic methodology to manufacture hierarchically porous electrode structures directly onto current collectors has been developed based on layer-by-layer spray printing, here exemplified using TiO2(B) nanotubes for lithium-ion batteries. By optimizing and then exploiting the bi-solvent dryi...
| Main Authors: | , , , , |
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| Format: | Journal article |
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Royal Society of Chemistry
2018
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| _version_ | 1826283021652721664 |
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| author | Lee, S Mahadevegowda, A Huang, C Evans, J Grant, P |
| author_facet | Lee, S Mahadevegowda, A Huang, C Evans, J Grant, P |
| author_sort | Lee, S |
| collection | OXFORD |
| description | A novel, generic methodology to manufacture hierarchically porous electrode structures directly onto current collectors has been developed based on layer-by-layer spray printing, here exemplified using TiO2(B) nanotubes for lithium-ion batteries. By optimizing and then exploiting the bi-solvent drying behavior of the spray printed ink to trigger self-assembly of the active TiO2(B) into a coral-like structure, controlled through-thickness pore channels were created, which were shown to promote lithium-ion mobility throughout the electrode. Using these optimized structures, the electrode thickness-dependent performance of TiO2(B) electrodes at high charge/discharge rates was compared with conventional slurry cast electrodes and revealed the superiority of the self-assembled electrodes, especially at the highest discharge rates. We also show this self-assembly effect in other active materials and over large areas, suggesting the potential for wide use of this approach for electrodes where fast dynamic response is prioritized. |
| first_indexed | 2024-03-07T00:52:39Z |
| format | Journal article |
| id | oxford-uuid:86e9d791-e4d2-450f-9f1c-d35e551ee0ac |
| institution | University of Oxford |
| last_indexed | 2024-03-07T00:52:39Z |
| publishDate | 2018 |
| publisher | Royal Society of Chemistry |
| record_format | dspace |
| spelling | oxford-uuid:86e9d791-e4d2-450f-9f1c-d35e551ee0ac2022-03-26T22:07:21ZSpray printing of self-assembled porous structures for high power battery electrodesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:86e9d791-e4d2-450f-9f1c-d35e551ee0acSymplectic Elements at OxfordRoyal Society of Chemistry2018Lee, SMahadevegowda, AHuang, CEvans, JGrant, PA novel, generic methodology to manufacture hierarchically porous electrode structures directly onto current collectors has been developed based on layer-by-layer spray printing, here exemplified using TiO2(B) nanotubes for lithium-ion batteries. By optimizing and then exploiting the bi-solvent drying behavior of the spray printed ink to trigger self-assembly of the active TiO2(B) into a coral-like structure, controlled through-thickness pore channels were created, which were shown to promote lithium-ion mobility throughout the electrode. Using these optimized structures, the electrode thickness-dependent performance of TiO2(B) electrodes at high charge/discharge rates was compared with conventional slurry cast electrodes and revealed the superiority of the self-assembled electrodes, especially at the highest discharge rates. We also show this self-assembly effect in other active materials and over large areas, suggesting the potential for wide use of this approach for electrodes where fast dynamic response is prioritized. |
| spellingShingle | Lee, S Mahadevegowda, A Huang, C Evans, J Grant, P Spray printing of self-assembled porous structures for high power battery electrodes |
| title | Spray printing of self-assembled porous structures for high power battery electrodes |
| title_full | Spray printing of self-assembled porous structures for high power battery electrodes |
| title_fullStr | Spray printing of self-assembled porous structures for high power battery electrodes |
| title_full_unstemmed | Spray printing of self-assembled porous structures for high power battery electrodes |
| title_short | Spray printing of self-assembled porous structures for high power battery electrodes |
| title_sort | spray printing of self assembled porous structures for high power battery electrodes |
| work_keys_str_mv | AT lees sprayprintingofselfassembledporousstructuresforhighpowerbatteryelectrodes AT mahadevegowdaa sprayprintingofselfassembledporousstructuresforhighpowerbatteryelectrodes AT huangc sprayprintingofselfassembledporousstructuresforhighpowerbatteryelectrodes AT evansj sprayprintingofselfassembledporousstructuresforhighpowerbatteryelectrodes AT grantp sprayprintingofselfassembledporousstructuresforhighpowerbatteryelectrodes |