Unusual Compressional Behavior of Lithium-Manganese Oxides: A Case Study of Li4Mn5O12

被引：24

作者：

Darul, Jolanta ^{[1
]}

Nowicki, Waldemar ^{[1
]}

Piszora, Pawel ^{[1
]}

机构：

[1] Adam Mickiewicz Univ, Fac Chem, Dept Chem Mat, PL-60780 Poznan, Poland

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 33期

关键词：

X-RAY-DIFFRACTION; HIGH-PRESSURE PHASE; EQUATION-OF-STATE; SPINEL STRUCTURE; TRANSITION; ION; COMPRESSIBILITY; LIMN2O4; MGAL2O4; INTERCALATION;

D O I：

10.1021/jp302227p

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Lithium-rich spinel oxide has been synthesized in a long-term low temperature sintering process via the intermediate defected phase. Synchrotron X-ray diffraction studies under pressure have been performed on Li4Mn5O12, and some similarity of its behavior under compression to that of LiMn2O4 has been demonstrated. Li4Mn5O12 reveals a bulk modulus value of K-0 = 118(1) GPa, and K-0 = 4.5(3) GPa. This value is far below 200 GPa, which is typical of most spinel oxides. The local compressibility of LiO4 tetrahedra is responsible for these unusual elastic properties of lithium-manganese spinel oxides both with Mn4+ only and Mn3+/Mn4+ ions in octahedral sites.

引用

页码：17872 / 17879

页数：8

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