不燃性常温型溶融塩電解液を用いるロッキングチェア型リチウム二次電池のＬｉ‐Ａｌ負極特性
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The rocking chair type lithium secondary battery using an LiCl saturated AlCl3–1–ethyl–3–methylimidazolium chloride (EMIC) melt as a nonflammable electrolyte operated at room temperatures has been developed. LiCl was soluble in the acidic melts (50 mol%<AlCl3). In this study, Li metal was added to the melt in order to reduce Al2Cl7− remained in the melt to Al and AlCl4−. As a result, the potential window of the melt became about 4.4 V between the reduction potential of EMI+ and the oxidation potential of AlCl4−. Lithium was only deposited on an Al electrode from this melt. Cyclic voltammograms for an Al electrode in the melt showed reversible depositing and resolving behavior for lithium. From X-ray diffraction analysis, it was confirmed that Li–Al alloy was formed on the Al substrate at room temperature. Chronopotentiograms for an LixAl electrode in the melt showed ca. 280 Ah/kg of discharge capacity at the potential plateau range about −1.5 V vs. Al.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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