Enthalpy of formation and heat capacity of Li2MnO3

被引：15

作者：

Cupid, Damian M. ^{[1
]}

Li, Dajian ^{[1
]}

Gebert, Christoph ^{[1
]}

Reif, Alexandra ^{[1
]}

Flandorfer, Hans ^{[2
]}

Seifert, Hans J. ^{[1
]}

机构：

[1] Karlsruhe Inst Technol, Inst Appl Mat Appl Mat Phys IAM AWP, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[2] Univ Vienna, Inst Inorgan Chem Funct Mat, Wahringerstr 42, A-1090 Vienna, Austria

来源：

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 2016年 / 124卷 / 10期

关键词：

Li2MnO3; Enthalpy of Formation; Heat Capacity; HIGH-TEMPERATURE CALORIMETRY; LITHIUM-ION BATTERIES; RICH OXIDE CATHODE; LIMO2; M; MN; SPINEL; PHASE; NI; DIRECTIONS; PROGRESS;

D O I：

10.2109/jcersj2.16116

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The enthalpy of formation of Li2MnO3 was measured by high temperature oxide solution calorimetry in a sodium molybdate solvent and the heat capacity of the compound was determined using differential scanning calorimetry. The enthalpy of formation of Li2MnO3 from the elements is slightly less exothermic than that of the orthorhombic and monoclinic modifications of LiMnO2 but more exothermic than that of LiNiO2, LiCoO2, the LiNi1-xCoxO2 solid solutions and the Li1+xMn2-xO4 spinels. The heat capacity of Li2MnO3 is also slightly lower than the estimated heat capacity based on stoichiometric amounts of Li2O and MnO2 according to the Neumann-Kopp approximation. The slight differences in heat capacities are attributed to the differences in the bonding environments of Li+ ions in Li2MnO3 and the constituent binary oxide Li2O. The thermochemical data presented here are essential for the advanced thermodynamic modeling of multicomponent electrode materials based on the promising xLi(2)MnO(3).(1-x)LiMO2 nano-composite cathode system. (C) 2016 The Ceramic Society of Japan. All rights reserved.

引用

页码：1072 / 1082

页数：11

共 34 条

[31]

WENGER M, 1991, EUR J MINERAL, V3, P387

[32] Improving the Cycling Performance of the Layered Ni-Rich Oxide Cathode by Introducing Low-Content Li2MnO3 [J].