成果報告書詳細
管理番号20110000001385
タイトル*平成22年度中間年報 革新型蓄電池先端科学基礎研究事業 革新型蓄電池先端科学基礎研究開発 1
公開日2012/6/27
報告書年度2010 - 2010
委託先名財団法人ファインセラミックスセンター
プロジェクト番号P09012
部署名スマートコミュニティ部
和文要約和文要約等以下本編抜粋:1. 共同研究の内容及び成果等 (1) 本研究の狙い 本プロジェクトの中で財団法人ファインセラミックスセンター(以下、JFCCという)は「電池反応解析グループ」に所属し、「in situ 電子線ホログラフィー」という研究開発テーマ名で「各種の全固体型モデルLiイオン電池を作製し、ホログラフィー電子顕微鏡内で充放電させながら電池内部(正極/電解質界面、負極/電解質界面等)の電位分布(イオン分布)を解析する手法を開発する」ことを目標に研究を行っている。さらに、「開発した解析手法を用いて電池起電力発生機構、充放電抵抗の本質、劣化機構等を解明し、優れた電池開発への指針を提供する」ことを狙っている。電子顕微鏡観察のための特殊なモデル電池作製は静岡大学へ再委託している。
英文要約Title:Research & Development Initiative for Scientific Innovation of New Generation Batteries (RISING) Project (FY2009-FY2011) FY2010 Annual Report
In-situ Electron Holography (JFCC)
Lithium ion batteries (LIBs) are considered the most promising devices for reducing CO2 emissions, because they can efficiently store and release large amount of electricity. However, the distribution and diffusion of Li ions which control the performance of the batteries have not yet been studied sufficiently. In this project we are developing advanced electron holography technique to observe Li-ion distributions in all-solid-state LIBs. Last year we reported our first in-situ Li-ion profiling experiment for an inorganic solid-state electrolyte, and here we present our new technique for dynamic Li-ion observation.
Li-ion battery samples were prepared in Shizuoka University. One sample, with an electron-beam transparent thin region prepared by focused ion beam (FIB) milling, was loaded on a TEM holder equipped with two fixed electrodes for applying voltage. The holder was inserted into an electron holography microscope. The microscope and a computer were combined and dynamic holograms recorded by a TV camera were sent to the computer to reconstruct Li-ion images dynamically.
Using the new system described above, Li-ion distributions at nanometer scale were visualized as electric potential distributions in real time. Variation of Li-ion distribution during charging and discharging was clearly observed in real time.
In conclusion, we have succeeded in dynamic observation of Li-ion distributions in an all-solid-state battery. We believe that this technique will enable us to reveal essential features of electrochemical reactions in Li-ion batteries and contribute to the development of superior Li-ion batteries in the near future.
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