2023 Fiscal Year Final Research Report
Frequency Response Analysis of Photorechargeable Process Integrating Photovoltaic and Electrochemical Energy Storage
| Project/Area Number |
21K04156
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 21050:Electric and electronic materials-related
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| Research Institution | Kagoshima University |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 光蓄電池 / 太陽電池 / 蓄電池 / 多孔体 / 導電性高分子 / ペロブスカイト型太陽電池 / 電気化学 / 電気化学インピーダンス |
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| Outline of Final Research Achievements |
This project aims to realize a photorechargeable battery, a solar cell with a storage function, by stacking a photovoltaic layer (PVL) and a storage layer (STL).
We primarily researched perovskite solar cells (PVL) and obtained knowledge of a stacking design and fabrication technology for photorechargeable cells. The pellet-type STL was obtained as a porous titanium/polyaniline with an FTO layer. Furthermore, TP-STL with an organic gel-electrolyte was tested. The charge/discharge capacity with gel was about 70% of that with a liquid. The electrochemical impedance analysis revealed that the decrease in capacity was caused by fusing the organic solvent molecules into the polyaniline chains and inhibiting charge transfer on charge/discharge. The analysis also provided insight into ion diffusion within the porous pores.
Conclusion: The development of PVL could not achieve its objective. The pellet-TP-STL achieved stable charge-discharge and sufficient capacity via electrolyte gelation.
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| Free Research Field |
材料科学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究課題では，太陽電池と蓄電池を一体化したデバイス「光蓄電池」の構築を目的としている．光蓄電池の機能自体は，太陽電池と別体の蓄電池の組合せで実現できるが，これらを一体化することで，不安定かつ希薄な太陽光エネルギーを濃縮し，必要なときに電力を取り出せる，スケーラブルなエネルギーデバイスとなる．このようなデバイスが安価で高性能なものが提供されれば，現在の太陽電池の問題点を解決でき，社会的に意義がある．
その研究技術は，太陽電池や蓄電池，それぞれの開発技術に加えて融合技術が必要となる．この課題で得られた知見や技術は，光蓄電池の開発のみならず，他分野への応用が可能となる．
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