A lithium iron phosphate reference electrode for ionic liquid electrolytes
We report on the development of a very simple and robust reference electrode suitable for use in room temperature ionic liquids, that can be employed with planar devices. The reference electrode is based on LiFePO4(LFP), a common cathode material in Li-ion batteries, which is air and water stable. T...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Elsevier Inc.
2018
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| Online Access: | http://purl.org/au-research/grants/arc/FT170100315 http://hdl.handle.net/20.500.11937/69743 |
| _version_ | 1848762123005460480 |
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| author | Wandt, Johannes Lee, Wade Arrigan, Damien Silvester, Debbie |
| author_facet | Wandt, Johannes Lee, Wade Arrigan, Damien Silvester, Debbie |
| author_sort | Wandt, Johannes |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We report on the development of a very simple and robust reference electrode suitable for use in room temperature ionic liquids, that can be employed with planar devices. The reference electrode is based on LiFePO4(LFP), a common cathode material in Li-ion batteries, which is air and water stable. The reference electrode can be drop-cast onto a planar electrode device in a single step. We demonstrate that very low Li+-ion concentrations (millimolar or below) are sufficient to obtain a stable and reproducible LFP potential, thus making physical separation between the reference and working electrode unnecessary. Most importantly, the LFP potential is also entirely stable in the presence of oxygen and shows only a very small drift (<10 mV) in the presence of hydrogen gas, while the potential of a platinum pseudo-reference electrode is shifted >800 mV. This is the first time that such a stable reference electrode system for ionic liquids has been implemented in miniaturized, planar electrode devices. |
| first_indexed | 2025-11-14T10:42:33Z |
| format | Journal Article |
| id | curtin-20.500.11937-69743 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:42:33Z |
| publishDate | 2018 |
| publisher | Elsevier Inc. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-697432021-01-13T03:09:38Z A lithium iron phosphate reference electrode for ionic liquid electrolytes Wandt, Johannes Lee, Wade Arrigan, Damien Silvester, Debbie We report on the development of a very simple and robust reference electrode suitable for use in room temperature ionic liquids, that can be employed with planar devices. The reference electrode is based on LiFePO4(LFP), a common cathode material in Li-ion batteries, which is air and water stable. The reference electrode can be drop-cast onto a planar electrode device in a single step. We demonstrate that very low Li+-ion concentrations (millimolar or below) are sufficient to obtain a stable and reproducible LFP potential, thus making physical separation between the reference and working electrode unnecessary. Most importantly, the LFP potential is also entirely stable in the presence of oxygen and shows only a very small drift (<10 mV) in the presence of hydrogen gas, while the potential of a platinum pseudo-reference electrode is shifted >800 mV. This is the first time that such a stable reference electrode system for ionic liquids has been implemented in miniaturized, planar electrode devices. 2018 Journal Article http://hdl.handle.net/20.500.11937/69743 10.1016/j.elecom.2018.07.006 http://purl.org/au-research/grants/arc/FT170100315 http://creativecommons.org/licenses/by/4.0/ Elsevier Inc. fulltext |
| spellingShingle | Wandt, Johannes Lee, Wade Arrigan, Damien Silvester, Debbie A lithium iron phosphate reference electrode for ionic liquid electrolytes |
| title | A lithium iron phosphate reference electrode for ionic liquid electrolytes |
| title_full | A lithium iron phosphate reference electrode for ionic liquid electrolytes |
| title_fullStr | A lithium iron phosphate reference electrode for ionic liquid electrolytes |
| title_full_unstemmed | A lithium iron phosphate reference electrode for ionic liquid electrolytes |
| title_short | A lithium iron phosphate reference electrode for ionic liquid electrolytes |
| title_sort | lithium iron phosphate reference electrode for ionic liquid electrolytes |
| url | http://purl.org/au-research/grants/arc/FT170100315 http://hdl.handle.net/20.500.11937/69743 |