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Noritaka Mizuno 水野 哲孝
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We proposed and proved new oxygen rocking batteries utilizing materials that allow oxygen extraction and insertion electrochemically in both the positive and negative electrodes. It is a safe and affordable electricity storage system, and is expected to be developed for use as batteries for large-capacity storage, such as in Smart Grids. In addition, the all-solid-state lithium batteries with oraganic crystalline electrodes we developed in this project have achieved an energy storage density exceeding the current lithium-ion batteries. image
Re-examining Battery Structures at Atomic and Molecular Le
Our research efforts include atomic and molecular level material design, development of new principles, development of next generation high performance batteries using analytical techniques, materials design , and simulation technologies.

Innovative basic research toward creation of high-performance battery Lithium ion secondary batteries are excellent energy storage systems with high energy density, and are widely used as the power source for mobile equipment. However, when considering large-scaled applications such as power source for electric vehicles and solar and wind power generation, further advancement not only in energy density but also power chemistry is needed. There are various other challenges that need to be tackled including difficulties in the design and development of non-combustible devices, reducing costs, etc.
In the current lithium ion secondary batteries, the lithium ion intake capacity of the carbon materials used for the anode is limited. In cathodes, less than half of the electrode is effectively used, also limiting the capacity. In addition, current organic electrolytes have problems of their safety and low ionic conductivity.
To solve these problems, we are currently designing and developing new materials for electrodes and electrolytes, as well as promoting the exploration of batteries that are designed under the new principles. Designing at the atomic and molecular levels would remarkably enhance the performance of energy storage devices.

High expectations on the innovation of storage technologies to solve global-scale energy problems Like any other advanced nation, Japan is now facing critical energy problems: one is the growing energy restrictions in terms of structure, and another is the concerns over global warming. Our country’s first and foremost task is to explore new markets by leading the world in developing high performance storage batteries, and reinvigorating industrial competitive strength. High hopes are placed on the innovation of storage technologies based on totally new concepts that would defy conventional wisdom.