岩石用偏光顕微鏡のリチウムイオン電池の塗布電極観察への応用

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  • Application of rock polarization microscope to observe the coated electrode of lithium ion battery
  • ガンセキヨウ ヘンコウ ケンビキョウ ノ リチウムイオン デンチ ノ トフ デンキョク カンサツ エ ノ オウヨウ

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  Rock polarization microscope is applied to the observation of micro-pores and interstices of electrode materials for lithium ion battery. The sample is solidified in resin doped with fluorescent dye and is observed under the plane- and cross-polarized conditions by an incident-light type polarization microscope. In the cross-polarized condition most part of reflected light which is initially polarized by the polarizer, is cut off by the analyzer and only the fluorescent light goes through the analyzer, which relatively emphasizes the fluorescence to highlight the material pores and interstices.<br>   In the lithium ion battery the electrode materials should be coated finely, densely and uniformly on the metal thin plate and therefore the micro-pores and interstices also should be distributed in the same way. In this study the distributions of particles and interstices were clearly observed in the polarization microscope, including pore sizes, pore shapes, their distributions and even the material detachment from metal plate. This observation contributes to the improvement of electrode coating in the production process.<br>

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  • 岩石鉱物科学

    岩石鉱物科学 41 (2), 47-51, 2012

    一般社団法人　日本鉱物科学会

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