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Title: Synthesis of layered cathode material Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2} from layered double hydroxides precursors

Abstract

Cathode materials Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2} for lithium secondary batteries have been prepared by a new route-precursor method of layered double hydroxides (LDHs). In situ high-temperature X-ray diffraction (HT-XRD) and thermogravimetric analysis coupled with mass spectrometry (TG-MS) were used to monitor the structural transformation during the reaction of CoMn LDHs and LiOH.H{sub 2}O: firstly the layered structure of LDHs transformed to an intermediate phase with spinel structure; then the distortion of the structure occurred with the intercalation of Li{sup +} into the lattice, resulting in the formation of layered Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2} with {alpha}-NaFeO{sub 2} structure. Extended X-ray absorption fine structure (EXAFS) data showed that the Co-O bonding length and the coordination number of Co were close to those of Mn in Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2}, which indicates that the local environments of the transitional metals are rather similar. X-ray photoelectron spectroscopy (XPS) was used to measure the oxidation state of Co and Mn. The influences of Co/Mn ratio on both the structure and electrochemical property of Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2} have been investigated by XRD and electrochemical tests.more » It has been found that the products synthesized by the precursor method demonstrated a rather stable cycling behavior, with a reversible capacity of 122.5 mAh g{sup -1} for the layered material Li[Co{sub 0.80}Mn{sub 0.20}]O{sub 2}. - Graphical abstract: In situ HT-XRD and TG-MS were used to monitor the structural transformation during the reaction of CoMn LDHs and LiOH.H{sub 2}O: firstly the layered structure of LDHs transformed to an intermediate phase with spinel structure; then intercalation of Li{sup +} occurred, which results in the formation of layered Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2} with {alpha}-NaFeO{sub 2} structure. The structure and the electrochemical properties of Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2} were studied.« less

Authors:
 [1];  [2];  [1];  [3]
  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029 (China)
  2. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029 (China), E-mail: weimin@mail.buct.edu.cn
  3. Beijing Key Laboratory, Beijing Institute of Clothing Technology, Beijing 100029 (China), E-mail: clycongjuli@bict.edu.cn
Publication Date:
OSTI Identifier:
21015836
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 180; Journal Issue: 5; Other Information: DOI: 10.1016/j.jssc.2007.04.001; PII: S0022-4596(07)00136-3; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION; ABSORPTION SPECTROSCOPY; COBALT COMPOUNDS; ELECTRIC BATTERIES; ELECTROCHEMISTRY; FINE STRUCTURE; LITHIUM; LITHIUM COMPOUNDS; LITHIUM HYDROXIDES; LITHIUM IONS; MANGANESE COMPOUNDS; MASS SPECTROSCOPY; OXIDES; SPINELS; SYNTHESIS; THERMAL GRAVIMETRIC ANALYSIS; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY; X-RAY SPECTROSCOPY

Citation Formats

Lu Yanluo, Wei Min, Yang Lan, and Li Congju. Synthesis of layered cathode material Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2} from layered double hydroxides precursors. United States: N. p., 2007. Web.
Lu Yanluo, Wei Min, Yang Lan, & Li Congju. Synthesis of layered cathode material Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2} from layered double hydroxides precursors. United States.
Lu Yanluo, Wei Min, Yang Lan, and Li Congju. Tue . "Synthesis of layered cathode material Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2} from layered double hydroxides precursors". United States. doi:.
@article{osti_21015836,
title = {Synthesis of layered cathode material Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2} from layered double hydroxides precursors},
author = {Lu Yanluo and Wei Min and Yang Lan and Li Congju},
abstractNote = {Cathode materials Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2} for lithium secondary batteries have been prepared by a new route-precursor method of layered double hydroxides (LDHs). In situ high-temperature X-ray diffraction (HT-XRD) and thermogravimetric analysis coupled with mass spectrometry (TG-MS) were used to monitor the structural transformation during the reaction of CoMn LDHs and LiOH.H{sub 2}O: firstly the layered structure of LDHs transformed to an intermediate phase with spinel structure; then the distortion of the structure occurred with the intercalation of Li{sup +} into the lattice, resulting in the formation of layered Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2} with {alpha}-NaFeO{sub 2} structure. Extended X-ray absorption fine structure (EXAFS) data showed that the Co-O bonding length and the coordination number of Co were close to those of Mn in Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2}, which indicates that the local environments of the transitional metals are rather similar. X-ray photoelectron spectroscopy (XPS) was used to measure the oxidation state of Co and Mn. The influences of Co/Mn ratio on both the structure and electrochemical property of Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2} have been investigated by XRD and electrochemical tests. It has been found that the products synthesized by the precursor method demonstrated a rather stable cycling behavior, with a reversible capacity of 122.5 mAh g{sup -1} for the layered material Li[Co{sub 0.80}Mn{sub 0.20}]O{sub 2}. - Graphical abstract: In situ HT-XRD and TG-MS were used to monitor the structural transformation during the reaction of CoMn LDHs and LiOH.H{sub 2}O: firstly the layered structure of LDHs transformed to an intermediate phase with spinel structure; then intercalation of Li{sup +} occurred, which results in the formation of layered Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2} with {alpha}-NaFeO{sub 2} structure. The structure and the electrochemical properties of Li[Co {sub x} Mn{sub 1-} {sub x} ]O{sub 2} were studied.},
doi = {},
journal = {Journal of Solid State Chemistry},
number = 5,
volume = 180,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}