Research

Eco-friendly secondary batteries with highly performance are needed for achieving the construction of smart grids and for solving problems such as depletion and pollution. Additionally, highly efficient electrical energy generation, conversion, and storage technology are needed utilizing their batteries. In order to address the problems, we have performed on a research of new secondary batteries promising excellent characteristics with low cost, high safety and high performance, conducting a research on energy management systems that combine various secondary batteries with solar cells.

Theme1：Development of Renewable Energy Management Systems

Overview

Fig. 1 Controlled Output Property of Rechargeable Batteries Using a Kalman Filter

Electrical power generation from renewable energy including solar, wind, water, and geothermal power is the lower load than combustion generation of chemical fuels against environment. However, massive blackout is possible to occur in a huge area in the worst case because the generating amount of electricity depends on weather and season. To prevent blackout, adjustment of the amount is required constantly in response to their conditions. To balance surplus and deficient electrical power, we are developing an energy management system that combines different types of power sources and rechargeable batteries.

Selected publications and works

M. Mito, T. Tojo, Construction of a Power Network System for Storage Batteries Using Arduino uno, 25th SCEJ Students Meeting (2023).

Keywords

Theme2：Development of Electrode Materials for Photovoltaic Secondary Batteries

Overview

Fig. 2 Theoretical and Experimental Design and Characterization of Photoreactive Electrodes for Photovoltaic Secondary Batteries

Solar cells generate electricity through solar light irradiation on the panels whereas they cannot store the generated electricity on their own, thereby combining rechargeable batteries to store the generated electricity. However, electrical energy loss extremely occurs on an energy transformation process from generation to storage of electricity due to multi energy transformation. Therefore, we are developing functional electrode materials that combines electrical generation with storage into a single battery.

Selected publications and works

[1] N. Wakatsuki, T. Tojo, Fabrication of Titanium Oxide Thin-Film Electrodes with Photocatalytic Activities and an Evaluation of Their Photoelectrochemical Properties, Engineering Proceedings 55(1) (2023) 57(1)-57(7).
[2] T. Tojo (Invited), Exploring an Optimal Electrode for Photoelectrochemical Cells using a Photocatalytic Reaction and Photoelectrochemical Characterizations, The 25th Takayanagi Kenjiro Memorial Symposium, 29th Nov. 2023.

Keywords

Title of class

Electric Machinery 1
Experimental Practice for Electrical, Electronic and Information Engineering 2
Electrical Circuit
Electric Circuit Exercise
Electrical Energy Conversion

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