Fe excess in hydrothermally synthesized LiFePO                         4

Xiaofei Sun; Youlong Xu

doi:10.1016/j.matlet.2012.06.053

Fe excess in hydrothermally synthesized LiFePO ₄

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9 引用（Scopus）

摘要

Olivine lithium iron phosphate (LiFePO ₄ ) is synthesized by a typical hydrothermal route. Although X-ray diffraction (XRD) shows no detectable impurities, inductively coupled plasma-atomic emission spectroscopy (ICP-AES) demonstrates extra iron (Fe) in the sample which is further indicated as crystallographic defects occupying lithium sites and a small amount of surface amorphous Fe ³ impurities by Rietveld refinement of high resolution synchrotron XRD and Raman spectroscopy, respectively. The latter possibility is also verified by high resolution transmission electron microscopy (HRTEM) and galvanostatic discharge/charge measurements between 2.0 and 3.2 V (vs. Li/Li). In addition, the influence of Fe excess on the electrochemical performance of LiFePO ₄ as a cathode material for lithium ion batteries (LIBs) is discussed.

源语言	英语
页（从-至）	139-142
页数	4
期刊	Materials Letters
卷	84
DOI	https://doi.org/10.1016/j.matlet.2012.06.053
出版状态	已出版 - 1 10月 2012

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10.1016/j.matlet.2012.06.053

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title = " Fe excess in hydrothermally synthesized LiFePO 4 ",

abstract = " Olivine lithium iron phosphate (LiFePO 4 ) is synthesized by a typical hydrothermal route. Although X-ray diffraction (XRD) shows no detectable impurities, inductively coupled plasma-atomic emission spectroscopy (ICP-AES) demonstrates extra iron (Fe) in the sample which is further indicated as crystallographic defects occupying lithium sites and a small amount of surface amorphous Fe 3 impurities by Rietveld refinement of high resolution synchrotron XRD and Raman spectroscopy, respectively. The latter possibility is also verified by high resolution transmission electron microscopy (HRTEM) and galvanostatic discharge/charge measurements between 2.0 and 3.2 V (vs. Li/Li). In addition, the influence of Fe excess on the electrochemical performance of LiFePO 4 as a cathode material for lithium ion batteries (LIBs) is discussed.",

keywords = "Defects, Energy storage and conversion, Fe excess, Hydrothermal, Lithium iron phosphate, Surfaces",

author = "Xiaofei Sun and Youlong Xu",

year = "2012",

month = oct,

day = "1",

doi = "10.1016/j.matlet.2012.06.053",

language = "英语",

volume = "84",

pages = "139--142",

journal = "Materials Letters",

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TY - JOUR

T1 - Fe excess in hydrothermally synthesized LiFePO 4

AU - Sun, Xiaofei

AU - Xu, Youlong

PY - 2012/10/1

Y1 - 2012/10/1

N2 - Olivine lithium iron phosphate (LiFePO 4 ) is synthesized by a typical hydrothermal route. Although X-ray diffraction (XRD) shows no detectable impurities, inductively coupled plasma-atomic emission spectroscopy (ICP-AES) demonstrates extra iron (Fe) in the sample which is further indicated as crystallographic defects occupying lithium sites and a small amount of surface amorphous Fe 3 impurities by Rietveld refinement of high resolution synchrotron XRD and Raman spectroscopy, respectively. The latter possibility is also verified by high resolution transmission electron microscopy (HRTEM) and galvanostatic discharge/charge measurements between 2.0 and 3.2 V (vs. Li/Li). In addition, the influence of Fe excess on the electrochemical performance of LiFePO 4 as a cathode material for lithium ion batteries (LIBs) is discussed.

AB - Olivine lithium iron phosphate (LiFePO 4 ) is synthesized by a typical hydrothermal route. Although X-ray diffraction (XRD) shows no detectable impurities, inductively coupled plasma-atomic emission spectroscopy (ICP-AES) demonstrates extra iron (Fe) in the sample which is further indicated as crystallographic defects occupying lithium sites and a small amount of surface amorphous Fe 3 impurities by Rietveld refinement of high resolution synchrotron XRD and Raman spectroscopy, respectively. The latter possibility is also verified by high resolution transmission electron microscopy (HRTEM) and galvanostatic discharge/charge measurements between 2.0 and 3.2 V (vs. Li/Li). In addition, the influence of Fe excess on the electrochemical performance of LiFePO 4 as a cathode material for lithium ion batteries (LIBs) is discussed.

KW - Defects

KW - Energy storage and conversion

KW - Fe excess

KW - Hydrothermal

KW - Lithium iron phosphate

KW - Surfaces

UR - https://www.scopus.com/pages/publications/84864420355

U2 - 10.1016/j.matlet.2012.06.053

DO - 10.1016/j.matlet.2012.06.053

M3 - 文章

AN - SCOPUS:84864420355

SN - 0167-577X

VL - 84

SP - 139

EP - 142

JO - Materials Letters

JF - Materials Letters

ER -

Fe excess in hydrothermally synthesized LiFePO 4

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Fe excess in hydrothermally synthesized LiFePO ₄