Structural Properties of Manganese Hexacyanoferrates against Li Concentration
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概要
- 論文の詳細を見る
Manganese hexacyanoferrate, LaxMn[Fe(CN)6]yzH2O, is a promising candidate for cathode materials for lithium ion secondary batteries, because the compound exhibits an ideal two-electron reaction without structural phase transition at y =0.83. We found that its capacity (Q) increases with Fe concentration (y) from Q = 115 mAh/g at y = 0.83 to 130 mAh/g at 0.87, and 143 mAh/g at 0.93. We further investigated the structural properties of LaxMn[Fe(CN)6]yzH2O against the Li concentration (x). In the low-x region, the y = 0.87 compound exhibits a phase separation into the two cubic phases, whereas the y = 0.93 compound separates into the cubic and tetragonal phases. We ascribed these phase separations to the Jahn--Teller (JT) instability as well as the smaller ionic radius of Mn3+.
- 2013-01-25
著者
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Moritomo Yutaka
Graduate School Of Pure And Applied Science University Of Tsukuba
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Kurihara Yutaro
Graduate School Of Pure And Applied Sciences University Of Tsukuba
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Matsuda Tomoyuki
Graduate School of Pure and Applied Science, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
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