Enthalpy of formation and heat capacity of Li2MnO3

Damian M. Cupid; Dajian Li; Christoph Gebert; Alexandra Reif; Hans Flandorfer; Hans J. Seifert

doi:10.2109/jcersj2.16116

Enthalpy of formation and heat capacity of Li2MnO3

Damian M. Cupid (Korresp. Autor*in), Dajian Li, Christoph Gebert, Alexandra Reif, Hans Flandorfer, Hans J. Seifert

Institut für Funktionelle Materialien und Katalyse

Veröffentlichungen: Beitrag in Fachzeitschrift › Artikel › Peer Reviewed

Abstract

The enthalpy of formation of Li ₂MnO ₃ 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 Li ₂MnO ₃ from the elements is slightly less exothermic than that of the orthorhombic and monoclinic modifications of LiMnO ₂ but more exothermic than that of LiNiO ₂, LiCoO ₂, the LiNi _1-xCo _xO ₂ solid solutions and the Li _1+xMn _2-xO ₄ spinels. The heat capacity of Li ₂MnO ₃ is also slightly lower than the estimated heat capacity based on stoichiometric amounts of Li ₂O and MnO ₂ 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 Li ₂MnO ₃ and the constituent binary oxide Li ₂O. The thermochemical data presented here are essential for the advanced thermodynamic modeling of multicomponent electrode materials based on the promising xLi ₂MnO ₃·(1-x)LiMO ₂ nano-composite cathode system.

Originalsprache	Englisch
Seiten (von - bis)	1072-1082
Seitenumfang	11
Fachzeitschrift	Journal of the Ceramic Society of Japan
Jahrgang	124
Ausgabenummer	10
DOIs	https://doi.org/10.2109/jcersj2.16116
Publikationsstatus	Veröffentlicht - Okt. 2016

ÖFOS 2012

104003 Anorganische Chemie
104011 Materialchemie

UN SDGs

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10.2109/jcersj2.16116

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title = "Enthalpy of formation and heat capacity of Li2MnO3",

abstract = "The enthalpy of formation of Li 2MnO 3 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 Li 2MnO 3 from the elements is slightly less exothermic than that of the orthorhombic and monoclinic modifications of LiMnO 2 but more exothermic than that of LiNiO 2, LiCoO 2, the LiNi 1-xCo xO 2 solid solutions and the Li 1+xMn 2-xO 4 spinels. The heat capacity of Li 2MnO 3 is also slightly lower than the estimated heat capacity based on stoichiometric amounts of Li 2O and MnO 2 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 Li 2MnO 3 and the constituent binary oxide Li 2O. The thermochemical data presented here are essential for the advanced thermodynamic modeling of multicomponent electrode materials based on the promising xLi 2MnO 3·(1-x)LiMO 2 nano-composite cathode system. ",

keywords = "Li2MnO3, Enthalpy of Formation, Heat Capacity, HIGH-TEMPERATURE CALORIMETRY, LITHIUM-ION BATTERIES, RICH OXIDE CATHODE, LIMO2 M, MN, SPINEL, PHASE, NI, DIRECTIONS, PROGRESS, Li MnO",

author = "Cupid, {Damian M.} and Dajian Li and Christoph Gebert and Alexandra Reif and Hans Flandorfer and Seifert, {Hans J.}",

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T1 - Enthalpy of formation and heat capacity of Li2MnO3

AU - Cupid, Damian M.

AU - Li, Dajian

AU - Gebert, Christoph

AU - Reif, Alexandra

AU - Flandorfer, Hans

AU - Seifert, Hans J.

PY - 2016/10

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N2 - The enthalpy of formation of Li 2MnO 3 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 Li 2MnO 3 from the elements is slightly less exothermic than that of the orthorhombic and monoclinic modifications of LiMnO 2 but more exothermic than that of LiNiO 2, LiCoO 2, the LiNi 1-xCo xO 2 solid solutions and the Li 1+xMn 2-xO 4 spinels. The heat capacity of Li 2MnO 3 is also slightly lower than the estimated heat capacity based on stoichiometric amounts of Li 2O and MnO 2 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 Li 2MnO 3 and the constituent binary oxide Li 2O. The thermochemical data presented here are essential for the advanced thermodynamic modeling of multicomponent electrode materials based on the promising xLi 2MnO 3·(1-x)LiMO 2 nano-composite cathode system.

AB - The enthalpy of formation of Li 2MnO 3 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 Li 2MnO 3 from the elements is slightly less exothermic than that of the orthorhombic and monoclinic modifications of LiMnO 2 but more exothermic than that of LiNiO 2, LiCoO 2, the LiNi 1-xCo xO 2 solid solutions and the Li 1+xMn 2-xO 4 spinels. The heat capacity of Li 2MnO 3 is also slightly lower than the estimated heat capacity based on stoichiometric amounts of Li 2O and MnO 2 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 Li 2MnO 3 and the constituent binary oxide Li 2O. The thermochemical data presented here are essential for the advanced thermodynamic modeling of multicomponent electrode materials based on the promising xLi 2MnO 3·(1-x)LiMO 2 nano-composite cathode system.

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KW - LIMO2 M

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