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Understanding the stability of MnPO sub(4)

We have revealed the critical role of carbon coating in the stability and thermal behaviour of olivine MnPO sub(4) obtained by chemical delithiation of LiMnPO sub(4). (Li)MnPO sub(4) samples with various particle sizes and carbon contents were studied. Carbon-free LiMnPO sub(4) obtained by solid sta...

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Published in:	Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2014-07, Vol.2 (32), p.12827-12834
Main Authors:	Huang, Yiqing, Fang, Jin, Omenya, Fredrick, O'Shea, Martin, Chernova, Natasha A, Zhang, Ruibo, Wang, Qi, Quackenbush, Nicholas F, Piper, Louis FJ, Scanlon, David O, Whittingham, MStanley
Format:	Article
Language:	English
Subjects:	Carbon Coating Crystal structure Heating Olivine Stability Structural stability Sustainability
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container_title	Journal of materials chemistry. A, Materials for energy and sustainability
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creator	Huang, Yiqing Fang, Jin Omenya, Fredrick O'Shea, Martin Chernova, Natasha A Zhang, Ruibo Wang, Qi Quackenbush, Nicholas F Piper, Louis FJ Scanlon, David O Whittingham, MStanley
description	We have revealed the critical role of carbon coating in the stability and thermal behaviour of olivine MnPO sub(4) obtained by chemical delithiation of LiMnPO sub(4). (Li)MnPO sub(4) samples with various particle sizes and carbon contents were studied. Carbon-free LiMnPO sub(4) obtained by solid state synthesis in O sub(2) becomes amorphous upon delithiation. Small amounts of carbon (0.3 wt%) help to stabilize the olivine structure, so that completely delithiated crystalline olivine MnPO sub(4) can be obtained. Larger amount of carbon (2 wt%) prevents full delithiation. Heating in air, O sub(2), or N sub(2) results in structural disorder (
doi_str_mv	10.1039/c4ta00434e
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(Li)MnPO sub(4) samples with various particle sizes and carbon contents were studied. Carbon-free LiMnPO sub(4) obtained by solid state synthesis in O sub(2) becomes amorphous upon delithiation. Small amounts of carbon (0.3 wt%) help to stabilize the olivine structure, so that completely delithiated crystalline olivine MnPO sub(4) can be obtained. Larger amount of carbon (2 wt%) prevents full delithiation. Heating in air, O sub(2), or N sub(2) results in structural disorder (<300 degree C), formation of an intermediate sarcopside Mn sub(3)(PO sub(4)) sub(2) phase (350-450 degree C), and complete decomposition to Mn sub(2)P sub(2)O sub(7) on extended heating at 400 degree C. 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Carbon coating protects MnPO sub(4) from reacting with environmental water, which is detrimental to its structural stability.</description><subject>Carbon</subject><subject>Coating</subject><subject>Crystal structure</subject><subject>Heating</subject><subject>Olivine</subject><subject>Stability</subject><subject>Structural stability</subject><subject>Sustainability</subject><issn>2050-7488</issn><issn>2050-7496</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqVirEOgjAURRujiURZ_IKOaKI-oC10NhoXo4POpEDRGizKK4N_L4Nx9y7nnOQSMgthFUIs1wVzCoDFTA-IFwGHZcKkGP48TcfER7xDvxRASOmRxcWWukWnbGnslbqbpn3kpjbuTZuKHuzpSLHLAzafklGlatT-lxMS7LbnzX75bJtXp9FlD4OFrmtlddNhFnIuRSIiDvEf1w-m2Tp6</recordid><startdate>20140701</startdate><enddate>20140701</enddate><creator>Huang, Yiqing</creator><creator>Fang, Jin</creator><creator>Omenya, Fredrick</creator><creator>O'Shea, Martin</creator><creator>Chernova, Natasha A</creator><creator>Zhang, Ruibo</creator><creator>Wang, Qi</creator><creator>Quackenbush, Nicholas F</creator><creator>Piper, Louis FJ</creator><creator>Scanlon, David O</creator><creator>Whittingham, MStanley</creator><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20140701</creationdate><title>Understanding the stability of MnPO sub(4)</title><author>Huang, Yiqing ; Fang, Jin ; Omenya, Fredrick ; O'Shea, Martin ; Chernova, Natasha A ; Zhang, Ruibo ; Wang, Qi ; Quackenbush, Nicholas F ; Piper, Louis FJ ; Scanlon, David O ; Whittingham, MStanley</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_miscellaneous_15596762503</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Carbon</topic><topic>Coating</topic><topic>Crystal structure</topic><topic>Heating</topic><topic>Olivine</topic><topic>Stability</topic><topic>Structural stability</topic><topic>Sustainability</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Huang, Yiqing</creatorcontrib><creatorcontrib>Fang, Jin</creatorcontrib><creatorcontrib>Omenya, Fredrick</creatorcontrib><creatorcontrib>O'Shea, Martin</creatorcontrib><creatorcontrib>Chernova, Natasha A</creatorcontrib><creatorcontrib>Zhang, Ruibo</creatorcontrib><creatorcontrib>Wang, Qi</creatorcontrib><creatorcontrib>Quackenbush, Nicholas F</creatorcontrib><creatorcontrib>Piper, Louis FJ</creatorcontrib><creatorcontrib>Scanlon, David O</creatorcontrib><creatorcontrib>Whittingham, MStanley</creatorcontrib><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of materials chemistry. 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subjects	Carbon Coating Crystal structure Heating Olivine Stability Structural stability Sustainability
title	Understanding the stability of MnPO sub(4)
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