Electrochemical properties of nanosized LiCrO 2·Li 2MnO 3 composite powders prepared by a new concept spray pyrolysis

You Na Ko; Jung Hyun Kim; Jung Kul Lee; Yun Chan Kang; Jong Heun Lee

doi:10.1016/j.electacta.2012.03.008

Electrochemical properties of nanosized LiCrO ₂·Li ₂MnO ₃ composite powders prepared by a new concept spray pyrolysis

You Na Ko, Jung Hyun Kim, Jung Kul Lee, Yun Chan Kang, Jong Heun Lee

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

16 Citations (Scopus)

Abstract

Nanosized LiCrO ₂·Li ₂MnO ₃ composite powders are prepared by a new concept spray pyrolysis. The precursor and post-treated powders have a Li ₂CrO ₄ impurity introduced by the partial oxidation of LiCrO ₂. The powders have a pure layered structure corresponding to the LiCrO ₂·Li ₂MnO ₃ composite after Li ₂CrO ₄ is removed by washing with distilled water. The real composition of the washed cathode powders is Li _1.18Cr _0.404Mn _0.477O ₂. The aggregated post-treated powders are converted into nanosized powders after washing with distilled water; milling is not required for this conversion. The mean size of the nanosized LiCrO ₂·Li ₂MnO ₃ powders is 48 nm. The LiCrO ₂·Li ₂MnO ₃ cathode sample post-treated at 750 °C has initial charge and discharge capacities of 272 and 233 mAh g ^-1 at a constant current density of 18 mA g ^-1, respectively. The discharge capacity of the cathode sample post-treated at 750 °C decreases from 233 to 222 mAh g ^-1 by the 44th cycle, in which the capacity retention is 95%.

Original language	English
Pages (from-to)	345-350
Number of pages	6
Journal	Electrochimica Acta
Volume	69
DOIs	https://doi.org/10.1016/j.electacta.2012.03.008
Publication status	Published - 2012 May 1

Bibliographical note

Funding Information:
This research was supported by the Converging Research Center Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2011-50210 ). This study was also supported by Seoul R&BD Program ( WR090671 ).

Keywords

Cathode material
Lithium battery
Lithium rich
Nanopowders
Spray pyrolysis

ASJC Scopus subject areas

General Chemical Engineering
Electrochemistry

Access to Document

10.1016/j.electacta.2012.03.008

Cite this

@article{f2344b7f6a8c4265b07e8f612a1fa7e3,

title = "Electrochemical properties of nanosized LiCrO 2·Li 2MnO 3 composite powders prepared by a new concept spray pyrolysis",

abstract = "Nanosized LiCrO 2·Li 2MnO 3 composite powders are prepared by a new concept spray pyrolysis. The precursor and post-treated powders have a Li 2CrO 4 impurity introduced by the partial oxidation of LiCrO 2. The powders have a pure layered structure corresponding to the LiCrO 2·Li 2MnO 3 composite after Li 2CrO 4 is removed by washing with distilled water. The real composition of the washed cathode powders is Li 1.18Cr 0.404Mn 0.477O 2. The aggregated post-treated powders are converted into nanosized powders after washing with distilled water; milling is not required for this conversion. The mean size of the nanosized LiCrO 2·Li 2MnO 3 powders is 48 nm. The LiCrO 2·Li 2MnO 3 cathode sample post-treated at 750 °C has initial charge and discharge capacities of 272 and 233 mAh g -1 at a constant current density of 18 mA g -1, respectively. The discharge capacity of the cathode sample post-treated at 750 °C decreases from 233 to 222 mAh g -1 by the 44th cycle, in which the capacity retention is 95%.",

keywords = "Cathode material, Lithium battery, Lithium rich, Nanopowders, Spray pyrolysis",

author = "Ko, {You Na} and Kim, {Jung Hyun} and Lee, {Jung Kul} and Kang, {Yun Chan} and Lee, {Jong Heun}",

note = "Funding Information: This research was supported by the Converging Research Center Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2011-50210 ). This study was also supported by Seoul R&BD Program ( WR090671 ).",

year = "2012",

month = may,

day = "1",

doi = "10.1016/j.electacta.2012.03.008",

language = "English",

volume = "69",

pages = "345--350",

journal = "Electrochimica Acta",

issn = "0013-4686",

publisher = "Elsevier Limited",

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TY - JOUR

T1 - Electrochemical properties of nanosized LiCrO 2·Li 2MnO 3 composite powders prepared by a new concept spray pyrolysis

AU - Ko, You Na

AU - Kim, Jung Hyun

AU - Lee, Jung Kul

AU - Kang, Yun Chan

AU - Lee, Jong Heun

N1 - Funding Information: This research was supported by the Converging Research Center Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2011-50210 ). This study was also supported by Seoul R&BD Program ( WR090671 ).

PY - 2012/5/1

Y1 - 2012/5/1

N2 - Nanosized LiCrO 2·Li 2MnO 3 composite powders are prepared by a new concept spray pyrolysis. The precursor and post-treated powders have a Li 2CrO 4 impurity introduced by the partial oxidation of LiCrO 2. The powders have a pure layered structure corresponding to the LiCrO 2·Li 2MnO 3 composite after Li 2CrO 4 is removed by washing with distilled water. The real composition of the washed cathode powders is Li 1.18Cr 0.404Mn 0.477O 2. The aggregated post-treated powders are converted into nanosized powders after washing with distilled water; milling is not required for this conversion. The mean size of the nanosized LiCrO 2·Li 2MnO 3 powders is 48 nm. The LiCrO 2·Li 2MnO 3 cathode sample post-treated at 750 °C has initial charge and discharge capacities of 272 and 233 mAh g -1 at a constant current density of 18 mA g -1, respectively. The discharge capacity of the cathode sample post-treated at 750 °C decreases from 233 to 222 mAh g -1 by the 44th cycle, in which the capacity retention is 95%.

AB - Nanosized LiCrO 2·Li 2MnO 3 composite powders are prepared by a new concept spray pyrolysis. The precursor and post-treated powders have a Li 2CrO 4 impurity introduced by the partial oxidation of LiCrO 2. The powders have a pure layered structure corresponding to the LiCrO 2·Li 2MnO 3 composite after Li 2CrO 4 is removed by washing with distilled water. The real composition of the washed cathode powders is Li 1.18Cr 0.404Mn 0.477O 2. The aggregated post-treated powders are converted into nanosized powders after washing with distilled water; milling is not required for this conversion. The mean size of the nanosized LiCrO 2·Li 2MnO 3 powders is 48 nm. The LiCrO 2·Li 2MnO 3 cathode sample post-treated at 750 °C has initial charge and discharge capacities of 272 and 233 mAh g -1 at a constant current density of 18 mA g -1, respectively. The discharge capacity of the cathode sample post-treated at 750 °C decreases from 233 to 222 mAh g -1 by the 44th cycle, in which the capacity retention is 95%.

KW - Cathode material

KW - Lithium battery

KW - Lithium rich

KW - Nanopowders

KW - Spray pyrolysis

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