What Happens to LiMnPO4 upon Chemical Delithiation?

Yiqing Huang; Natasha A. Chernova; Qiyue Yin; Qi Wang; Nicholas F. Quackenbush; Michal Leskes; Jin Fang; Fredrick Omenya; Ruibo Zhang; Matthew J. Wahila; Louis F. J. Piper; Guangwen Zhou; Clare P. Grey; M. Stanley Whittingham

doi:https://doi.org/10.1021/acs.inorgchem.6b00089

What Happens to LiMnPO4 upon Chemical Delithiation?

Yiqing Huang, Natasha A. Chernova, Qiyue Yin, Qi Wang, Nicholas F. Quackenbush, Michal Leskes, Jin Fang, Fredrick Omenya, Ruibo Zhang, Matthew J. Wahila, Louis F. J. Piper, Guangwen Zhou, Clare P. Grey, M. Stanley Whittingham

Research output: Contribution to journal › Article › peer-review

Abstract

Olivine MnPO4 is the delithiated phase of the lithium-ion-battery cathode (positive electrode) material LiMnPO4, which is formed at the end of charge. This phase is metastable under ambient conditions and can only be produced by delithiation of LiMnPO4. We have revealed the manganese dissolution phenomenon during chemical delithiation of LiMnPO4, which causes amorphization of olivine MnPO4. The properties of crystalline MnPO4 obtained from carbon-coated LiMnPO4 and of the amorphous product resulting from delithiation of pure LiMnPO4 were studied and compared. The phosphorus-rich amorphous phases in the latter are considered to be MnHP2O7 and MnH2P2O7 from NMR, X-ray absorption spectroscopy, and X-ray photoelectron spectroscopy analysis. The thermal stability of MnPO4 is significantly higher under high vacuum than at ambient condition, which is shown to be related to surface water removal.

Original language	English
Pages (from-to)	4335-4343
Number of pages	9
Journal	Inorganic Chemistry
Volume	55
Issue number	9
DOIs	https://doi.org/10.1021/acs.inorgchem.6b00089
State	Published - 2 May 2016
Externally published	Yes

All Science Journal Classification (ASJC) codes

Inorganic Chemistry
Physical and Theoretical Chemistry

Access to Document

https://doi.org/10.1021/acs.inorgchem.6b00089

https://www.osti.gov/biblio/1371342License: Unspecified

Cite this

@article{02cdeb3d774a4408b08665c0f8a74e9a,

title = "What Happens to LiMnPO4 upon Chemical Delithiation?",

abstract = "Olivine MnPO4 is the delithiated phase of the lithium-ion-battery cathode (positive electrode) material LiMnPO4, which is formed at the end of charge. This phase is metastable under ambient conditions and can only be produced by delithiation of LiMnPO4. We have revealed the manganese dissolution phenomenon during chemical delithiation of LiMnPO4, which causes amorphization of olivine MnPO4. The properties of crystalline MnPO4 obtained from carbon-coated LiMnPO4 and of the amorphous product resulting from delithiation of pure LiMnPO4 were studied and compared. The phosphorus-rich amorphous phases in the latter are considered to be MnHP2O7 and MnH2P2O7 from NMR, X-ray absorption spectroscopy, and X-ray photoelectron spectroscopy analysis. The thermal stability of MnPO4 is significantly higher under high vacuum than at ambient condition, which is shown to be related to surface water removal.",

author = "Yiqing Huang and Chernova, {Natasha A.} and Qiyue Yin and Qi Wang and Quackenbush, {Nicholas F.} and Michal Leskes and Jin Fang and Fredrick Omenya and Ruibo Zhang and Wahila, {Matthew J.} and Piper, {Louis F. J.} and Guangwen Zhou and Grey, {Clare P.} and Whittingham, {M. Stanley}",

note = "This work was supported as part of the NECCES, an Energy Frontier Research Center funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences, under Award DE-SC0012583. Q.W. was supported at Brookhaven National Laboratory by NYSERDA and NYSTAR with matching funds for NECCES. TEM work was carried out at the Center for Functional Nanomaterials, Brookhaven National Laboratory, which is supported by the U.S. DOE, Office of Basic Energy Sciences, under Contract DE-SC0012704. This research used resources of the Advanced Photon Source, a U.S. DOE, Office of Science, user facility operated for the U.S. DOE, Office of Science, by Argonne National Laboratory under Contract DE-AC02-06CH11357.",

year = "2016",

month = may,

day = "2",

doi = "https://doi.org/10.1021/acs.inorgchem.6b00089",

language = "الإنجليزيّة",

volume = "55",

pages = "4335--4343",

journal = "Inorganic Chemistry",

issn = "0020-1669",