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Other TitleDevelopment of thin-filmed and composite-type Li-ion-batteries with light weight and high reliability for space
Author(jpn)馬場 守; 中村 雄一郎; 阿部 貴志; 西館 数芽; 青田 克己; 寺島 薫
Author(eng)Baba, Mamoru; Nakamura, Yuichiro; Abe, Takashi; Nishidate, Kazume; Aota, Katsumi; Terashima, Kaoru
Author Affiliation(jpn)岩手大学 工学部; 岩手大学 工学部; 岩手大学 工学部; 岩手大学 工学部; シチズン時計 技術研究所; シチズン時計 技術研究所
Author Affiliation(eng)Iwate University Faculty of Engineering; Iwate University Faculty of Engineering; Iwate University Faculty of Engineering; Iwate University Faculty of Engineering; Citizen Watch Co. Ltd. Technical Laboratory; Citizen Watch Co. Ltd. Technical Laboratory
Issue Date2004-06
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
Publication title第23回宇宙エネルギーシンポジウム 平成15年度
The 23rd ISAS Space Energy Symposium March 9, 2004
Start page16
End page20
Publication date2004-06
AbstractRecently, considerable attention has been paid to the investigations of solid-state lithium-ion rechargeable batteries for widespread application in many types of portable electronic devices. Previously, the multi-layered Li-ion batteries were reported. In the present paper, investigated were the composite-type Li-ion rechargeable batteries stacked with an Si solar cell for higher performance of the thin-filmed battery. Thin films of LiMn2O4 positive electrode, Li3PO(4-x)N(x) solid electrolyte and V2O5 negative electrode were successively prepared onto an amorphous Si solar cell on a glass substrate by an rf-magnetron sputtering method with a typical rf power of 100 W under an Ar-gas, Ar/N2 and Ar/O2 mixture-gas pressure of 10 mTorr, respectively. The five Si solar cells which have a cell voltage of 0.65 V under illumination were connected in-series in order to charge effectively the Li-ion cell of a cell voltage of approximately 3 V. The areas of the three types of unit solar cells are 5 x 5 sq mm, 7 x 7 sq mm, and 10 x 10 sq mm, respectively. On the other hand, the effective operation area of Li-ion cells is 3.9 sq cm or 2.8 sq cm. The composite-type battery showed typically the discharge capacity of 10 to 15 micro-Ah/sq cm with an efficiency of approximately 100 percent. A maintenance-free operation of this battery could also be confirmed by moving it under the constant sink current of 5 micro-A in the laboratory room through day and night. In conclusion, a new thin-filmed battery could successfully be constructed by the Li-ion rechargeable cell being stacked on the Si solar cell. This type of battery has several advantages of light weight, high reliability and flexibility for the cell shape, almost all of which result from the thin-filmed and all-solid-state battery. Furthermore, the composite-type Li-ion-battery can be used as a maintenance-free battery by direct recharge from the Si solar cell in spite of power supply from AC 100 V. The present battery may be expected for the potential use in small-sized medical instruments and in space satellites/stations which need the light weight and high reliability mentioned above.
Keywordsresearch and development; composite-type lithium ion battery; component reliability; solar cell; electric discharge; performance test; storage battery; maintenance-free performance; 研究開発; 複合型リチウムイオン電池; 要素信頼性; 太陽電池; 放電; 性能試験; 蓄電池; メンテナンスフリー性能
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会

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