| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
Electrochemical anion intercalation/de-intercalation reaction into graphite electrode in organic electrolyte solutions was studied. The interfacial activation energy showed much smaller than that of Li+. This is because of the weak interaction between anion and solvent species and as the result, the rate determining step is no longer the de-solvation process and the activation barrier would be on the graphite side, i.e., the solvation process is the rate determining.
The anion intercalation was suppressed by the pressure apply on the graphite electrode. Therefore, the activation barrier on the graphite was correlated with the re-orientation of the graphene layers. Moreover, the diffusion coefficient of TFSA anion was over 1 order lager than that of Li+. These results indicate that the anion intercalation reaction will be attractive for high power batteries. Besides, the results also will promote the science concerning the anion intercalation into graphite.
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