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成果報告書詳細
管理番号20190000000569
タイトル*2018年度中間年報 先進・革新蓄電池材料評価技術開発(第2期)(技術研究組合リチウムイオン電池材料評価研究センター)
公開日2019/6/11
報告書年度2018 - 2018
委託先名技術研究組合リチウムイオン電池材料評価研究センター
プロジェクト番号P18003
部署名次世代電池・水素部
和文要約
英文要約Title: Development of Fundamental technologies for All Solid State Battery applied to Electric Vehicles (FY2018 - FY2020) FY2018 Annual Report

Outline and Achievements of Research & Development

1. Development of Common Basic Technology
1-1. Development of common basic technology for the 1st generation of all-solid-battery
(i) Duplation of battery energy density
The battery energy density has been doubled with the 2-cm sq. laminate cell comprising an NMC cathode, graphite anode, and glassy sulfide solid electrolyte as standard materials through improvement in the processing technologies.
(ii) Liquid-phase synthesis of solid electrolyte
The liquid-phase synthesis of a crystalline-type solid electrolyte has been developed using various solvents, and the ion-conductivity of the resulting electrolyte is in the range of 10^-4 S/cm.
(iii) Formulation of basic specification for standard battery
The basic specification has formulated for the laminate-type 7-cm sq. standard battery of the 1st generation all-solid-LIB, and the design and setup of the production facility have been carried out.
1-2. Development of common basic technology for the next generation of all-solid-battery
The basic structural concept of the standard battery for the next generation all-solid LIB has been studied on the basis of the findings as below.
(i) The battery operation at 5 V has been confirmed with the powder-press cell prepared from a high-voltage cathode material of LiCo0.5Mn1.5O4 with surface coating to reduce the resistance at solid-solid interface.
(ii) The attainment of a capacity around 200 mAh/g has been confirmed with the powder-press cell prepared from an amorphous-oxide cathode material having electron and ion conductivities and moldability all together.
(iii) It has been clarified that the crystallinity of silicon in the anode correlates with the capacity.
1-3. Numerical analysis and battery evaluation
(i) Development of simulation model
The models of one dimensional electrochemical simulation and 3-demensional heat conduction have been constructed to estimate the charge-discharge property, thermal property of electrodes, and the thermal distribution in the battery pack.
(ii) Formulation of evaluation items for all-solid-battery
The evaluation items and the test conditions have been formulated for the performance and safety tests to all-solid LIB.

2. Social System Design
2-1. Review of social system design
The working group composed of PL, vice PLs, car makers, battery makers, etc. has been established to discuss the contents of the survey analysis carried out in the next budget year or later. The concluding priority issues for the analysis are the aspect of future car market, infrastructure of battery charge, movement of policy and market, user needs, value chain, and reuse/recycle. The method of the survey analysis has also been determined. To arrange the popularization scenario of EV and PHEV, the working group has hypothetically summarized the points of the issue.
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