成果報告書詳細
管理番号20150000000442
タイトル*平成26年度中間年報 SIP(戦略的イノベーション創造プログラム) 革新的設計生産技術 フルイディック材料創製と3Dプリンティングによる構造化機能材料・デバイスの迅速開発(3)
公開日2015/7/18
報告書年度2014 - 2014
委託先名日産自動車株式会社
プロジェクト番号P14030
部署名ロボット・機械システム部
和文要約
英文要約Title: Strategic Innovation Creation Program (SIP) / Innovative Design and Production
Technology: Prompt development of functional materials and devices by creation of fluidic materials and 3D additive manufacturing

Performance upgrade of Electric-Vehicles (EV) is one of the keys to the realization of a low-carbon society by domination of EV. To shorten the battery charging-time, we are studying on LIB composed of a cathode and an anode with three-dimensionally controlled structures. The electrodes having patterning surfaces enable to minimize migration length of Li ions between two electrodes and increase the reaction area for Li ion and electron, resulting shortening the charging time. To this end, three works in this current year we conducted are as follows.

The development of 3D LIB technology. (on entry 7)
To determine the direction of the development, 3D LIB composed of conventional anode and 3D patterned cathode were fabricated using printing method for micro patterning and its cell performances were evaluated. The comparison result against conventional LIB showed that the rate capabilities for charge and discharge processes using 3D-LIB were better than those using conventional one. From the next fiscal year, we plan to judge the possibility of the quick-charging within 5 minutes with a 3D LIB composed of both electrodes with patterned surfaces, which are finely designed by the simulation model.

The development of design technology for 3D-LIB. (on entry 8)
To establish the design guide in regard to the electrode structures in a 3D-LIB, we developed a simulation model for electrochemical reaction. This model enables us to predict how the structural parameters in 3D-LIB affect the cell performance. And the fact that the simulation results showed the 3D LIB can drastically improve the rate capability by optimizing the height and the pitch of patterns. From next fiscal year, we plan to conduct the accuracy enhancement of the simulation model by comparing its results with experimental results.

The development of process technology for 3D-LIB. (on entry 9)
To manufacture a 3D electrode structure, we investigated on the sinterability of solid electrolyte. LLZ powder that showed high conductivity and stability was chosen as an electrolyte material. The result showed that sinterability was apparently changed by kinds of ceramics plates while sintering. It was also found that additives could dramatically improve the sinterability. From next fiscal year, we plan to develop technology for the reduction resistivity of solid electrolyte and to evaluate its cell performances.

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