成果報告書詳細
管理番号20120000000305
タイトル*平成23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 2
公開日2012/6/27
報告書年度2011 - 2011
委託先名国立大学法人京都大学、三洋電機株式会社、株式会社GSユアサ、新神戸電機株式会社、トヨタ自動車株式会社、株式会社豊田中央研究所、日産自動車株式会社、パナソニック株式会社、株式会社日立製作所、株式会社本田技術研究所、三菱自動車工業株式会社、三菱重工業株式会社
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
京都大学を拠点として産官学の英知を結集してリチウムイオン電池の革新のために「現象解析の新技術」に取り組んできた。京都大学と参画法人からの研究員とが共同で京都大学に研究環境を整備し、「高度解析技術開発」、「電池反応解析」、「革新型蓄電池開発」のそれぞれの研究を推進した。
1 高度解析技術開発リチウムイオン電池を始めとする蓄電池において、nmオーダーの界面・μmオーダーの活物質粒子・mmオーダーの合剤電極と様々な空間スケールの分布を有し、また時間的にも複雑な階層構造を有する電池内の反応挙動を捉え、挙動解明により特性の革新的な性能向上を図るため、電池の反応が起こる“その場”(in situ)観察を行う新しい高度な解析技術の研究開発が必要である。また次世代・革新電池の要素技術開発においても、既存の蓄電池の限界とその要因を解明し、限界を打破する新しいコンセプトの醸成が必須である。
英文要約 (FY2009-2013)FY2011 Annual Report
Kyoto University
In this project, analytical new methods for battery reactions have been studied by the cooperation with industries, schools and government on purpose to develop innovative Lithium Ion Batteries(LIB). Kyoto University is the center of the project. Facilities for this research center are organized by researchers from the university and cooperating companies. The promotion has been made mainly on “Advanced battery reaction analysis” and “Innovative battery (Post LIB)”.
The study of “Advanced analysis” is a step to innovative LIB materials and an innovative battery as a post LIB as well. It has developed in-situ and real-time monitoring analysis for a leading-edge storage battery which is capable of high space resolution, time resolution and element discrimination. The technologies such as highly brilliant synchrotron radiation and neutron quantum beam are practically used for the research. The analysis has been studied for film formation on active materials and electrolyte surface. The structure transfer of active material and the electrode behavior has been also observed.
In spite of the J-PARC damage from Tohoku - Pacific Ocean Earthquake, the R&D during the first term (FY2009-2011) reached its goal thoroughly.
It is necessary to speed up Li-ion transfer to improve the LIB rate-capability. Inside a cell, Li-ion first diffuses in the cathode active materials and move thorough the cathode active material / electrolyte interface to the anode active material / electrolyte interface and then again diffuses in anode active materials. The rate-capability during this transfer varies depending on many factors, such as particle diameter of cathode and anode active materials, thickness of combined electrode, reaction site of active materials and thickness of separator. It is also affected by a film state in cathode and anode electrodes. Under the high-rate, a battery deteriorates because of heterogeneity of the electric current density. The development of in-situ and real-time monitoring analysis made it possible to analyze these complex mechanisms of battery reactions both on space scale and time scale.
The target of “Innovative battery”is Advanced Storage Batteries with an energy density of 500Wh/kg as early as possible before 2030 studying the basic knowledge and the R&D direction. For this purpose, the research adopts two approaches; a reservoir style and an interface controlled style. The former concerned metal-air batteries and anode for multi-valent-ion batteries, and the latter concerned nano-interface controlled batteries and a solid state batteries and so on as research objects. However, we have become more focus on metal-air batteries and nano-interface controlled batteries to reach the target.
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