Spray-printed and self-assembled honeycomb electrodes of silicon-decorated carbon nanofibers for Li-ion batteries
Directional, micron-scale honeycomb pores in Li-ion battery electrodes were fabricated using a layer-by-layer, self-assembly approach based on spray-printing of carbon nanofibers. By controlling the drying behavior of each printed electrode layer through optimization of (i) the volume ratio of fugit...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
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American Chemical Society
2018
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| _version_ | 1797051673455099904 |
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| author | Lee, S Li, K Huang, C Evans, J Grant, P |
| author_facet | Lee, S Li, K Huang, C Evans, J Grant, P |
| author_sort | Lee, S |
| collection | OXFORD |
| description | Directional, micron-scale honeycomb pores in Li-ion battery electrodes were fabricated using a layer-by-layer, self-assembly approach based on spray-printing of carbon nanofibers. By controlling the drying behavior of each printed electrode layer through optimization of (i) the volume ratio of fugitive bisolvent carriers in the suspension and (ii) the substrate temperature during printing, self-assembled, honeycomb pore channels through the electrode were created spontaneously and reliably on current collector areas larger than 20 cm × 15 cm. The honeycomb pore structure promoted efficient Li-ion dynamics at high charge/discharge current densities. Incorporating an optimum fraction (2.5 wt %) of high-energy-density Si particulate into the honeycomb electrodes provided a 4-fold increase in deliverable discharge capacity at 8000 mA/g. The spray-printed, honeycomb pore electrodes were then investigated as negative electrodes coupled with similar spray-printed LiFePO4 positive electrodes in a full Li-ion cell configuration, providing an approximately 50% improvement in rate capacity retention over half-cell configurations of identical electrodes at 4000 mA/g. |
| first_indexed | 2024-03-06T18:22:52Z |
| format | Journal article |
| id | oxford-uuid:06e98f08-9035-4b7e-b720-01b8401b0558 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:22:52Z |
| publishDate | 2018 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:06e98f08-9035-4b7e-b720-01b8401b05582022-03-26T09:04:51ZSpray-printed and self-assembled honeycomb electrodes of silicon-decorated carbon nanofibers for Li-ion batteriesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:06e98f08-9035-4b7e-b720-01b8401b0558EnglishSymplectic Elements at OxfordAmerican Chemical Society2018Lee, SLi, KHuang, CEvans, JGrant, PDirectional, micron-scale honeycomb pores in Li-ion battery electrodes were fabricated using a layer-by-layer, self-assembly approach based on spray-printing of carbon nanofibers. By controlling the drying behavior of each printed electrode layer through optimization of (i) the volume ratio of fugitive bisolvent carriers in the suspension and (ii) the substrate temperature during printing, self-assembled, honeycomb pore channels through the electrode were created spontaneously and reliably on current collector areas larger than 20 cm × 15 cm. The honeycomb pore structure promoted efficient Li-ion dynamics at high charge/discharge current densities. Incorporating an optimum fraction (2.5 wt %) of high-energy-density Si particulate into the honeycomb electrodes provided a 4-fold increase in deliverable discharge capacity at 8000 mA/g. The spray-printed, honeycomb pore electrodes were then investigated as negative electrodes coupled with similar spray-printed LiFePO4 positive electrodes in a full Li-ion cell configuration, providing an approximately 50% improvement in rate capacity retention over half-cell configurations of identical electrodes at 4000 mA/g. |
| spellingShingle | Lee, S Li, K Huang, C Evans, J Grant, P Spray-printed and self-assembled honeycomb electrodes of silicon-decorated carbon nanofibers for Li-ion batteries |
| title | Spray-printed and self-assembled honeycomb electrodes of silicon-decorated carbon nanofibers for Li-ion batteries |
| title_full | Spray-printed and self-assembled honeycomb electrodes of silicon-decorated carbon nanofibers for Li-ion batteries |
| title_fullStr | Spray-printed and self-assembled honeycomb electrodes of silicon-decorated carbon nanofibers for Li-ion batteries |
| title_full_unstemmed | Spray-printed and self-assembled honeycomb electrodes of silicon-decorated carbon nanofibers for Li-ion batteries |
| title_short | Spray-printed and self-assembled honeycomb electrodes of silicon-decorated carbon nanofibers for Li-ion batteries |
| title_sort | spray printed and self assembled honeycomb electrodes of silicon decorated carbon nanofibers for li ion batteries |
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