Li(V0.5Ti0.5)S2 as a 1V lithium intercalation electrode
Graphite, the dominant anode in rechargeable Q3 lithium batteries, operates at ~0.1 V versus Li+/Li and can result in lithium plating on the graphite surface, raising safety concerns. Titanates, for example, Li4Ti5O12, intercalate lithium at ~1.6 V versus Li+/Li, avoiding problematic lithium plating...
| Main Authors: | , , , |
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| Format: | Journal article |
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Nature Publishing Group: Nature Communications
2016
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| _version_ | 1826258423669325824 |
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| author | Bruce, P Clark, S Wang, D Armstrong, A |
| author_facet | Bruce, P Clark, S Wang, D Armstrong, A |
| author_sort | Bruce, P |
| collection | OXFORD |
| description | Graphite, the dominant anode in rechargeable Q3 lithium batteries, operates at ~0.1 V versus Li+/Li and can result in lithium plating on the graphite surface, raising safety concerns. Titanates, for example, Li4Ti5O12, intercalate lithium at ~1.6 V versus Li+/Li, avoiding problematic lithium plating at the expense of reduced cell voltage. There is interest in 1 V anodes, as this voltage is sufficiently high to avoid lithium plating while not significantly reducing cell potential. The sulphides, LiVS2 and LiTiS2, have been investigated as possible 1 V intercalation electrodes but suffer from capacity fading, large 1st cycle irreversible capacity or polarization. Here we report that the 50/50 solid solution, Li1þx(V0.5Ti0.5)S2, delivers a reversible capacity to store charge of 220 mAhg^-1 (at 0.9 V), 99% of theoretical, at a rate of C/2, retaining 205 mAhg^-1 at C-rate (92% of theoretical). Rate capability is excellent with 200 mAhg^-1 at 3C. C-rate is discharge in 1 h. Polarization is low, 100 mV at C/2. To the best of our knowledge, the properties/performances of Li(V0.5Ti0.5)S2 exceed all previous 1 V electrodes. |
| first_indexed | 2024-03-06T18:33:46Z |
| format | Journal article |
| id | oxford-uuid:0a8a86c8-ab67-4b72-be4a-2048d06115bc |
| institution | University of Oxford |
| last_indexed | 2024-03-06T18:33:46Z |
| publishDate | 2016 |
| publisher | Nature Publishing Group: Nature Communications |
| record_format | dspace |
| spelling | oxford-uuid:0a8a86c8-ab67-4b72-be4a-2048d06115bc2022-03-26T09:24:23ZLi(V0.5Ti0.5)S2 as a 1V lithium intercalation electrodeJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0a8a86c8-ab67-4b72-be4a-2048d06115bcSymplectic Elements at OxfordNature Publishing Group: Nature Communications2016Bruce, PClark, SWang, DArmstrong, AGraphite, the dominant anode in rechargeable Q3 lithium batteries, operates at ~0.1 V versus Li+/Li and can result in lithium plating on the graphite surface, raising safety concerns. Titanates, for example, Li4Ti5O12, intercalate lithium at ~1.6 V versus Li+/Li, avoiding problematic lithium plating at the expense of reduced cell voltage. There is interest in 1 V anodes, as this voltage is sufficiently high to avoid lithium plating while not significantly reducing cell potential. The sulphides, LiVS2 and LiTiS2, have been investigated as possible 1 V intercalation electrodes but suffer from capacity fading, large 1st cycle irreversible capacity or polarization. Here we report that the 50/50 solid solution, Li1þx(V0.5Ti0.5)S2, delivers a reversible capacity to store charge of 220 mAhg^-1 (at 0.9 V), 99% of theoretical, at a rate of C/2, retaining 205 mAhg^-1 at C-rate (92% of theoretical). Rate capability is excellent with 200 mAhg^-1 at 3C. C-rate is discharge in 1 h. Polarization is low, 100 mV at C/2. To the best of our knowledge, the properties/performances of Li(V0.5Ti0.5)S2 exceed all previous 1 V electrodes. |
| spellingShingle | Bruce, P Clark, S Wang, D Armstrong, A Li(V0.5Ti0.5)S2 as a 1V lithium intercalation electrode |
| title | Li(V0.5Ti0.5)S2 as a 1V lithium intercalation electrode |
| title_full | Li(V0.5Ti0.5)S2 as a 1V lithium intercalation electrode |
| title_fullStr | Li(V0.5Ti0.5)S2 as a 1V lithium intercalation electrode |
| title_full_unstemmed | Li(V0.5Ti0.5)S2 as a 1V lithium intercalation electrode |
| title_short | Li(V0.5Ti0.5)S2 as a 1V lithium intercalation electrode |
| title_sort | li v0 5ti0 5 s2 as a 1v lithium intercalation electrode |
| work_keys_str_mv | AT brucep liv05ti05s2asa1vlithiumintercalationelectrode AT clarks liv05ti05s2asa1vlithiumintercalationelectrode AT wangd liv05ti05s2asa1vlithiumintercalationelectrode AT armstronga liv05ti05s2asa1vlithiumintercalationelectrode |