Improved electrochemical properties of LiNi 0.5Mn 1.5O 4 spinel material by surface modification with LiCoO 2

Seo Hyo-Ree, Yi Cheol-Woo, Keon Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The attractive cathode material, LiNi 0.5Mn 1.5O 4 for lithium ion batteries was synthesized and its surface was modified by adding LiCoO 2 by a sol-gel method. This research is aimed to figure out the effects of LiCoO 2 added to pristine LiNi 0.5Mn 1.5O 4. The electrochemical performance was characterized by galvanostatic cycle tests between 3.0 and 4.9V versus Li/Li + at 0.5 C-rate using the prepared coin cells consisting of a series of LiNi 0.5Mn 1.5O 4 cathode each, lithium metal anode, and 1M LiPF 6 in DMC/EC (1:1 v/v) electrolyte. In XRD results, there exist some impurity phases attributed to the added LiCoO 2 even at the high sintering temperature, but these impurities did not exert influence on the electrochemical behavior of the samples. Also, the charge/discharge results are in good agreement with the XRD data. As increasing the amount of LiCoO 2, (220) phase XRD peak which means a degree of cation mixing developed and this affected the amount of inserted/extracted Li ions. Thus, cobalt-rich samples showed the lower capacity than pristine LiNi 0.5Mn 1.5O 4. However, a little amount of LiCoO 2-added LiNi 0.5Mn 1.5O 4 showed the best electrochemical properties. The improved kinetics and electrochemical properties are discussed in detail.

Original languageEnglish
Title of host publicationACS National Meeting Book of Abstracts
Publication statusPublished - 2011
Event241st ACS National Meeting and Exposition - Anaheim, CA, United States
Duration: 2011 Mar 272011 Mar 31

Other

Other241st ACS National Meeting and Exposition
CountryUnited States
CityAnaheim, CA
Period11/3/2711/3/31

Fingerprint

Electrochemical properties
Surface treatment
Cathodes
Impurities
Cobalt
Lithium
Sol-gel process
Electrolytes
Cations
Anodes
Sintering
Positive ions
Metals
Ions
Kinetics
Temperature
spinell
Lithium-ion batteries

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Improved electrochemical properties of LiNi 0.5Mn 1.5O 4 spinel material by surface modification with LiCoO 2 . / Hyo-Ree, Seo; Cheol-Woo, Yi; Kim, Keon.

ACS National Meeting Book of Abstracts. 2011.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hyo-Ree, S, Cheol-Woo, Y & Kim, K 2011, Improved electrochemical properties of LiNi 0.5Mn 1.5O 4 spinel material by surface modification with LiCoO 2 in ACS National Meeting Book of Abstracts. 241st ACS National Meeting and Exposition, Anaheim, CA, United States, 11/3/27.
@inproceedings{1c08b1905e4c4c2e9e00185ae958bdec,
title = "Improved electrochemical properties of LiNi 0.5Mn 1.5O 4 spinel material by surface modification with LiCoO 2",
abstract = "The attractive cathode material, LiNi 0.5Mn 1.5O 4 for lithium ion batteries was synthesized and its surface was modified by adding LiCoO 2 by a sol-gel method. This research is aimed to figure out the effects of LiCoO 2 added to pristine LiNi 0.5Mn 1.5O 4. The electrochemical performance was characterized by galvanostatic cycle tests between 3.0 and 4.9V versus Li/Li + at 0.5 C-rate using the prepared coin cells consisting of a series of LiNi 0.5Mn 1.5O 4 cathode each, lithium metal anode, and 1M LiPF 6 in DMC/EC (1:1 v/v) electrolyte. In XRD results, there exist some impurity phases attributed to the added LiCoO 2 even at the high sintering temperature, but these impurities did not exert influence on the electrochemical behavior of the samples. Also, the charge/discharge results are in good agreement with the XRD data. As increasing the amount of LiCoO 2, (220) phase XRD peak which means a degree of cation mixing developed and this affected the amount of inserted/extracted Li ions. Thus, cobalt-rich samples showed the lower capacity than pristine LiNi 0.5Mn 1.5O 4. However, a little amount of LiCoO 2-added LiNi 0.5Mn 1.5O 4 showed the best electrochemical properties. The improved kinetics and electrochemical properties are discussed in detail.",
author = "Seo Hyo-Ree and Yi Cheol-Woo and Keon Kim",
year = "2011",
language = "English",
booktitle = "ACS National Meeting Book of Abstracts",

}

TY - GEN

T1 - Improved electrochemical properties of LiNi 0.5Mn 1.5O 4 spinel material by surface modification with LiCoO 2

AU - Hyo-Ree, Seo

AU - Cheol-Woo, Yi

AU - Kim, Keon

PY - 2011

Y1 - 2011

N2 - The attractive cathode material, LiNi 0.5Mn 1.5O 4 for lithium ion batteries was synthesized and its surface was modified by adding LiCoO 2 by a sol-gel method. This research is aimed to figure out the effects of LiCoO 2 added to pristine LiNi 0.5Mn 1.5O 4. The electrochemical performance was characterized by galvanostatic cycle tests between 3.0 and 4.9V versus Li/Li + at 0.5 C-rate using the prepared coin cells consisting of a series of LiNi 0.5Mn 1.5O 4 cathode each, lithium metal anode, and 1M LiPF 6 in DMC/EC (1:1 v/v) electrolyte. In XRD results, there exist some impurity phases attributed to the added LiCoO 2 even at the high sintering temperature, but these impurities did not exert influence on the electrochemical behavior of the samples. Also, the charge/discharge results are in good agreement with the XRD data. As increasing the amount of LiCoO 2, (220) phase XRD peak which means a degree of cation mixing developed and this affected the amount of inserted/extracted Li ions. Thus, cobalt-rich samples showed the lower capacity than pristine LiNi 0.5Mn 1.5O 4. However, a little amount of LiCoO 2-added LiNi 0.5Mn 1.5O 4 showed the best electrochemical properties. The improved kinetics and electrochemical properties are discussed in detail.

AB - The attractive cathode material, LiNi 0.5Mn 1.5O 4 for lithium ion batteries was synthesized and its surface was modified by adding LiCoO 2 by a sol-gel method. This research is aimed to figure out the effects of LiCoO 2 added to pristine LiNi 0.5Mn 1.5O 4. The electrochemical performance was characterized by galvanostatic cycle tests between 3.0 and 4.9V versus Li/Li + at 0.5 C-rate using the prepared coin cells consisting of a series of LiNi 0.5Mn 1.5O 4 cathode each, lithium metal anode, and 1M LiPF 6 in DMC/EC (1:1 v/v) electrolyte. In XRD results, there exist some impurity phases attributed to the added LiCoO 2 even at the high sintering temperature, but these impurities did not exert influence on the electrochemical behavior of the samples. Also, the charge/discharge results are in good agreement with the XRD data. As increasing the amount of LiCoO 2, (220) phase XRD peak which means a degree of cation mixing developed and this affected the amount of inserted/extracted Li ions. Thus, cobalt-rich samples showed the lower capacity than pristine LiNi 0.5Mn 1.5O 4. However, a little amount of LiCoO 2-added LiNi 0.5Mn 1.5O 4 showed the best electrochemical properties. The improved kinetics and electrochemical properties are discussed in detail.

UR - http://www.scopus.com/inward/record.url?scp=80051882398&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80051882398&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:80051882398

BT - ACS National Meeting Book of Abstracts

ER -