2017 Fiscal Year Final Research Report
High fluxi mass transport in a narrow space by smart control of nanobubble generation/dissolution
| Project/Area Number |
15K13881
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Thermal engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
植村 豪 東京工業大学, 工学院, 特任准教授 (70515163)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | リチウム空気電池 |
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| Outline of Final Research Achievements |
To realize a more powerful lithium-air battery, it is necessary to clarify and improve the O2 transport phenomena in the cathode. In this study, the effect of dissolved O2 concentration in the electrolyte on the cathode performance of a lithium-air battery was investigated. Using a beaker-type cell and nano/micro-bubble generator to dissolve O2, O2 concentration in the electrolyte was varied from 6.5 to 15.0 mg/L.
As a result, discharge performance was improved by increasing the dissolved O2 concentration in the electrolyte. However, concentration overpotential still dominates the discharge at high current density. By using a fine optical oxygen sensor, O2 concentration in the porous cathode was measured. It was found that O2 concentration in the cathode reached considerably low value. In order to improve the performance, an electrolyte flow cell was employed, and the concentration overpotential (transport resistance) was lowered.
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| Free Research Field |
熱工学
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