Does oxygen transport affect the cell voltages of metal/air batteries?
Simultaneous transport of an electrolyte and dissolved oxygen is analyzed with Newman's concentrated-solution theory to assess how nonuniform oxygen distributions might impact the volt- ages of metal/air batteries. For a solution comprising a neutral solvent, a simple salt, and oxygen, the Onsa...
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| Format: | Journal article |
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Electrochemical Society
2017
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| _version_ | 1797057927964524544 |
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| author | Monroe, C |
| author_facet | Monroe, C |
| author_sort | Monroe, C |
| collection | OXFORD |
| description | Simultaneous transport of an electrolyte and dissolved oxygen is analyzed with Newman's concentrated-solution theory to assess how nonuniform oxygen distributions might impact the volt- ages of metal/air batteries. For a solution comprising a neutral solvent, a simple salt, and oxygen, the Onsager-Stefan-Maxwell transport equations are inverted, yielding ux-explicit laws for oxygen, anion, and cation transport that distinguish the effects of individual diffusion and migration driv- ing forces. Along with the ionic conductivity, electrolyte diffusivity, oxygen diffusivity, and cation transference number, a migration coefficient and a cross-diffusion coefficient are identified, which respectively account for the effects of electro-osmotic drag on oxygen and diffusional drag between salt and oxygen. A derived current/voltage relation reveals how oxygen gradients can in princi- ple affect the cell potential; significant diffusion potential can arise from oxygen if it experiences electro-osmotic drag. Prior models are proven to follow from an assumption that cross-diffusion and electro-osmosis are both negligible, or, equivalently, that oxygen/ion interactions are weak. Experi- ments to quantify the novel transport properties are discussed, along with quantitative estimates of the cross diffusivity and migration coefficient |
| first_indexed | 2024-03-06T19:43:18Z |
| format | Journal article |
| id | oxford-uuid:216747ce-33fd-4db0-b1ba-2ad9c35d0bff |
| institution | University of Oxford |
| last_indexed | 2024-03-06T19:43:18Z |
| publishDate | 2017 |
| publisher | Electrochemical Society |
| record_format | dspace |
| spelling | oxford-uuid:216747ce-33fd-4db0-b1ba-2ad9c35d0bff2022-03-26T11:33:16ZDoes oxygen transport affect the cell voltages of metal/air batteries?Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:216747ce-33fd-4db0-b1ba-2ad9c35d0bffSymplectic Elements at OxfordElectrochemical Society2017Monroe, CSimultaneous transport of an electrolyte and dissolved oxygen is analyzed with Newman's concentrated-solution theory to assess how nonuniform oxygen distributions might impact the volt- ages of metal/air batteries. For a solution comprising a neutral solvent, a simple salt, and oxygen, the Onsager-Stefan-Maxwell transport equations are inverted, yielding ux-explicit laws for oxygen, anion, and cation transport that distinguish the effects of individual diffusion and migration driv- ing forces. Along with the ionic conductivity, electrolyte diffusivity, oxygen diffusivity, and cation transference number, a migration coefficient and a cross-diffusion coefficient are identified, which respectively account for the effects of electro-osmotic drag on oxygen and diffusional drag between salt and oxygen. A derived current/voltage relation reveals how oxygen gradients can in princi- ple affect the cell potential; significant diffusion potential can arise from oxygen if it experiences electro-osmotic drag. Prior models are proven to follow from an assumption that cross-diffusion and electro-osmosis are both negligible, or, equivalently, that oxygen/ion interactions are weak. Experi- ments to quantify the novel transport properties are discussed, along with quantitative estimates of the cross diffusivity and migration coefficient |
| spellingShingle | Monroe, C Does oxygen transport affect the cell voltages of metal/air batteries? |
| title | Does oxygen transport affect the cell voltages of metal/air batteries? |
| title_full | Does oxygen transport affect the cell voltages of metal/air batteries? |
| title_fullStr | Does oxygen transport affect the cell voltages of metal/air batteries? |
| title_full_unstemmed | Does oxygen transport affect the cell voltages of metal/air batteries? |
| title_short | Does oxygen transport affect the cell voltages of metal/air batteries? |
| title_sort | does oxygen transport affect the cell voltages of metal air batteries |
| work_keys_str_mv | AT monroec doesoxygentransportaffectthecellvoltagesofmetalairbatteries |