Structure and stability of olivine phase FePO 4

Gene M. Nolis; Natalya A. Chernova; Shailesh Upreti; M. Stanley Whittingham

doi:10.1557/opl.2011.1339

Structure and stability of olivine phase FePO ₄

Gene M. Nolis
, Natalya A. Chernova
, Shailesh Upreti
, M. Stanley Whittingham

Chemistry

Binghamton University

State University of New York Binghamton University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

LiFePO ₄ has shown considerable promise as a cathode material in Li-ion batteries due to its stability, low toxicity and high cyclability. However, the data on thermodynamic stability of olivine phase FePO ₄ (o-FePO ₄), the delithiated form of o-LiFePO ₄, remains scarce and contradictory. In this work, o-FePO ₄ was synthesized by chemical delithiation of o-LiFePO ₄ and characterized structurally and thermally. X-ray diffraction and absorption data indicate pure olivine phase, but with residual amount of Fe ²⁺, most likely due to incomplete delithiation. Differential scanning calorimetry and thermal gravimetric analysis reveal that o-Li _xFePO ₄ decomposes exothermally above 550°C with about 9% weight loss, the products being trigonal phase FePO ₄, Fe ₇(PO ₄) ₆, and LiPO ₃.

Original language	English
Title of host publication	Nanostructured Materials for Energy Storage
Pages	1-6
Number of pages	6
DOIs	https://doi.org/10.1557/opl.2011.1339
State	Published - 2011
Event	2011 MRS Spring Meeting - San Francisco, CA, United States Duration: Apr 25 2011 → Apr 29 2011

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	1333

Conference

Conference	2011 MRS Spring Meeting
Country/Territory	United States
City	San Francisco, CA
Period	04/25/11 → 04/29/11

Access to Document

10.1557/opl.2011.1339

Cite this

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title = "Structure and stability of olivine phase FePO 4",

abstract = "LiFePO 4 has shown considerable promise as a cathode material in Li-ion batteries due to its stability, low toxicity and high cyclability. However, the data on thermodynamic stability of olivine phase FePO 4 (o-FePO 4), the delithiated form of o-LiFePO 4, remains scarce and contradictory. In this work, o-FePO 4 was synthesized by chemical delithiation of o-LiFePO 4 and characterized structurally and thermally. X-ray diffraction and absorption data indicate pure olivine phase, but with residual amount of Fe 2+, most likely due to incomplete delithiation. Differential scanning calorimetry and thermal gravimetric analysis reveal that o-Li xFePO 4 decomposes exothermally above 550°C with about 9\% weight loss, the products being trigonal phase FePO 4, Fe 7(PO 4) 6, and LiPO 3.",

author = "Nolis, \{Gene M.\} and Chernova, \{Natalya A.\} and Shailesh Upreti and Whittingham, \{M. Stanley\}",

year = "2011",

doi = "10.1557/opl.2011.1339",

language = "English",

isbn = "9781618395290",

series = "Materials Research Society Symposium Proceedings",

pages = "1--6",

booktitle = "Nanostructured Materials for Energy Storage",

note = "2011 MRS Spring Meeting ; Conference date: 25-04-2011 Through 29-04-2011",

}

TY - GEN

T1 - Structure and stability of olivine phase FePO 4

AU - Nolis, Gene M.

AU - Chernova, Natalya A.

AU - Upreti, Shailesh

AU - Whittingham, M. Stanley

PY - 2011

Y1 - 2011

N2 - LiFePO 4 has shown considerable promise as a cathode material in Li-ion batteries due to its stability, low toxicity and high cyclability. However, the data on thermodynamic stability of olivine phase FePO 4 (o-FePO 4), the delithiated form of o-LiFePO 4, remains scarce and contradictory. In this work, o-FePO 4 was synthesized by chemical delithiation of o-LiFePO 4 and characterized structurally and thermally. X-ray diffraction and absorption data indicate pure olivine phase, but with residual amount of Fe 2+, most likely due to incomplete delithiation. Differential scanning calorimetry and thermal gravimetric analysis reveal that o-Li xFePO 4 decomposes exothermally above 550°C with about 9% weight loss, the products being trigonal phase FePO 4, Fe 7(PO 4) 6, and LiPO 3.

AB - LiFePO 4 has shown considerable promise as a cathode material in Li-ion batteries due to its stability, low toxicity and high cyclability. However, the data on thermodynamic stability of olivine phase FePO 4 (o-FePO 4), the delithiated form of o-LiFePO 4, remains scarce and contradictory. In this work, o-FePO 4 was synthesized by chemical delithiation of o-LiFePO 4 and characterized structurally and thermally. X-ray diffraction and absorption data indicate pure olivine phase, but with residual amount of Fe 2+, most likely due to incomplete delithiation. Differential scanning calorimetry and thermal gravimetric analysis reveal that o-Li xFePO 4 decomposes exothermally above 550°C with about 9% weight loss, the products being trigonal phase FePO 4, Fe 7(PO 4) 6, and LiPO 3.

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DO - 10.1557/opl.2011.1339

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SN - 9781618395290

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