Structural Properties of Manganese Hexacyanoferrates against Li Concentration

被引：27

作者：

Kurihara, Yutaro ^{[1
]}

Matsuda, Tomoyuki ^{[1
]}

Moritomo, Yutaka ^{[1
,2
]}

机构：

[1] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan

[2] Univ Tsukuba, Tsukuba Res Ctr Interdisciplinary Mat Sci TIMS, Tsukuba, Ibaraki 3058571, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2013年 / 52卷 / 01期

关键词：

ION DIFFUSION;

D O I：

10.7567/JJAP.52.017301

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Manganese hexacyanoferrate, LaxMn[Fe(CN)(6)](y)zH(2)O, 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 La-x Mn[Fe(CN)(6)](y)zH(2)O 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+. (C) 2013 The Japan Society of Applied Physics

引用

页数：6

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