成果報告書詳細
管理番号20120000000293
タイトル*平成22年度中間年報 蓄電複合システム化技術開発 要素技術開発 ビルPV用蓄電システムの研究開発
公開日2012/6/27
報告書年度2010 - 2010
委託先名三菱電機株式会社
プロジェクト番号P10008
部署名スマートコミュニティ部
和文要約和文要約等以下本編抜粋:
1.
研究開発の内容及び成果等
高頻度の入出力動作に対応可能な蓄電デバイスを目指し、高容量蓄電部と高入出力蓄電部をセル内部で融合させた(LIBとLICを複合させた)複合型蓄電デバイス(HLIC:Hybrid Lithium Ion Capacitor)を開発する。
英文要約R&D of Practical and integrated Energy storage systems for smart community.
Elemental technology development.Research and development of a power storage system for solar cells on the roof of a building.(FY2010-2011) FY2010 Annual Report.
We have developed a hybrid device (HLIC: Hybrid Lithium Ion Capacitor) which combined a lithium ion capacitor (LIC) element and a lithium ion battery (LIB) element in the electrode components. The HLIC has a common negative electrode and two positive ones. The common negative electrode is including a negative electrode collector foil having through-holes. The two positive electrodes are; the first positive electrode (AC) containing particles of activated carbon and the second positive electrode (LFP) containing particles of a lithium-containing metal compound (LiFePO4) as an active material. The HLIC has a life-extending effect to the cycle life of a LIB.
(1)Electrochemical Study of a HLIC.
A HLIC cell which has a common negative electrode and two set of AC and LFP positive electrodes were studied using eight reference electrodes embedded around the common negative electrode. The electric current through the AC1 and LFP1 was measured separately by using two ammeters. The AC2 and LFP2 were not connected. Sharing of total current to the AC1 and LFP1 positive electrodes was occurred during charge-discharge tests. The sharing of current can be one of the life-extending effects of the HLIC. The potentials in the horizontal plane of the AC2 and LFP2 side were uniform during the charge-discharge tests, but a little change was observed at the area close to the AC1 and LFP1.
(2)Development of the common negative electrodes.
Several carbon materials were evaluated and a graphitized carbon was selected for the electrode materials of the common negative electrode.
(3)Development of the positive electrodes.
Activated carbon materials were evaluated for the LIC positive electrode, and lithium-containing metal compound materials were evaluated for the LIB positive electrode.
(4)Development of a 10Wh class hybrid lithium ion capacitor.
A HLIC (LIC and LIB, alternately) cell which had stacking structure was manufactured using the developed technology. High power rate performance was obtained with the cell.
Newly, a HLIC 10Wh class cell with stacking structure which arranged LIC only to top and bottom was manufactured and was stored in an aluminum laminating container. Energy storage of 10Wh and the energy density of 74Wh/kg were obtained with the cell.
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