Vol.1 No.4 2009

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Research paper : Development of high power and high capacity lithium secondary battery based on the advanced nanotechnology (I. Honma)−228 Synthesiology - English edition Vol.1 No.4 (2009) material size was found for product specification as result of systematic exploration of missing range of active material size in order to create innovative battery product quickly using excellent lithium storage property of nanosize active material that was found by university and AIST. Moreover, we fabricated the prototype battery cell was fabricated, and high output and cycle properties were confirmed to be applicable as product.Figure 11 is a Ragone plot of the battery performance of prototype fabricated for the project. It surpassed the performance of existing lithium secondary battery products, and achieved high capacity and output properties that were set as project goal values. In addition, charge-discharge cycle property, which is the most important specification in product realization, was investigated to 10,000 times under high output condition, and capacity retention of 60 % was obtained. Hence, its superiority compared to existing battery products was shown, and it was found that it had reliability that could withstand product realization. Currently, product development of high-power battery utilizing the innovative energy property of these nanocrystal active materials is in progress. AIST generated the concept of nanocrystal electrode as innovative energy storage material, realized high output property at basic research phase, academically clarified the innovative energy storage property that arose from surface effect and size effect, and then demonstrated high-power lithium battery utilizing the excellent electrode properties of nanocrystal active material through collaboration with battery manufacturer.4 “Shortening distance” to innovation through interdisciplinary fusion and industry-academia-government vertical collaborationAs strategy for “shortening distance” to innovation as described in the paper, Full Research was accelerated by interdisciplinary fusion and vertical collaboration of industry-academia-government, as shown in Fig. 12. I shall emphasize the point that characteristic of AIST is that innovative new technology is often generated through interdisciplinary fusion. Since it has high number and density of researchers, and has wide research spectrum that covers almost the entire range of industrial technology from standard, geology, bio, to information, fusion of diverse disciplines and integration of elemental technologies can be done readily. This means that it is a research organization with high potential for innovation appropriate for creating new technologies and concepts never seen before. Utilizing this organization structure, it is capable of generating innovative sprout technology in the interface of the disciplines. That is, bud of new technology can be created in diverse interface regions such as bio and energy, standard and nanotech, or electronics and environment, and high innovation potential that will serve as platform of innovative technology can be created.Next point to be considered is the methodology of how to investigate the efficacy of such innovation potential in short time, or synthesiology of innovation. Taking as example the R&D for high power lithium battery, which the Author lead in the NEDO project, I shall discuss the R&D process that can investigate the efficacy of innovation potential in short time, for example in few years, through the vertical collaboration scheme of industry-academia-government. As shown in Fig. 12, vertical collaboration is organized by gathering the university (located upstream) that engages in basic research, AIST that engages in Full Research, and battery manufacturer and automobile manufacturer who is the end user (downstream) into one project that is vertically Interdisciplinary fusion and industry-academia-government vertical collaboration NanotechnologyOrganization with high density of innovation potentialsNanocrystal, monodisperse synthesis, nanoporous material, self-assembly synthesis, inorganic processLow-resistance electrode, high ion diffusivity, high-rate charge transfer, nanoporous electrode, mass production technology for nanocrystalHigh-capacity high-power battery, high-rate charge-discharge battery, power tool batteryEnergyBasic scienceInorganic chemical processNew technology through interdisciplinary fusion① University (upstream)② AIST③ Battery manufacturer④ Automaker (downstream)Prototype battery★Swift investigation for practical application through vertical collaborationLarge battery products for automobileProductExploration of optimal nanosize, investigation of inexpensive materials, cell design, lithium secondary batteryHEV power source, regenerative power source, electric car, dispersed power source“Shortening distance” of innovation →Highest number of researchers and widest spectrum of research areasFig. 12 Synthesiological method for innovation by industry-academia-government vertical collaboration.(8)−

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