Solid Solution Phases in the Olivine-Type LiMnPO4/MnPO4 System

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Nonstoichiometry is reported in the LiMnPO{sub 4}/MnPO{sub 4} system for the first time. As lithium is removed from crystalline LiMnPO{sub 4} by chemical or electrochemical methods, the resulting two phase mixture consists of stoichiometric LiMnPO{sub 4} and a delithiated phase, Li{sub y}MnPO{sub 4}, whose lattice parameters depend upon the global extent of delithiation and on the crystalline domain size of the delithiated phase. This behavior is reproduced during electrochemical insertion of lithium. Again, no evidence for nonstoichiometry was found in the vicinity of LiMnPO{sub 4}. Attempts to create single phase solid solutions by heating mixtures of the two phases failed ... continued below

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Chen, Guoying & Richardson, Thomas J. April 7, 2009.

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Nonstoichiometry is reported in the LiMnPO{sub 4}/MnPO{sub 4} system for the first time. As lithium is removed from crystalline LiMnPO{sub 4} by chemical or electrochemical methods, the resulting two phase mixture consists of stoichiometric LiMnPO{sub 4} and a delithiated phase, Li{sub y}MnPO{sub 4}, whose lattice parameters depend upon the global extent of delithiation and on the crystalline domain size of the delithiated phase. This behavior is reproduced during electrochemical insertion of lithium. Again, no evidence for nonstoichiometry was found in the vicinity of LiMnPO{sub 4}. Attempts to create single phase solid solutions by heating mixtures of the two phases failed due to the thermal instability of Li{sub y}MnPO{sub 4}.

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  • Journal Name: Electrochemical Society

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  • Report No.: LBNL-3566E
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 984313
  • Archival Resource Key: ark:/67531/metadc1012846

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  • April 7, 2009

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  • Oct. 14, 2017, 8:36 a.m.

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  • Oct. 18, 2017, 10:12 a.m.

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Chen, Guoying & Richardson, Thomas J. Solid Solution Phases in the Olivine-Type LiMnPO4/MnPO4 System, article, April 7, 2009; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc1012846/: accessed December 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.