Electrochemical properties of the carbon-coated LiFePO4 as a cathode material for lithium-ion secondary batteries

Ho Chul Shin; Won Il Cho; Ho Jang

doi:10.1016/j.jpowsour.2005.12.043

Electrochemical properties of the carbon-coated LiFePO₄ as a cathode material for lithium-ion secondary batteries

Ho Chul Shin, Won Il Cho, Ho Jang

Department of Materials Science and Engineering

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

195 Citations (Scopus)

Abstract

In this study the effect of the carbon coating on the electrochemical properties of LiFePO₄ as a cathode for Li-ion batteries were investigated. The carbon-coated LiFePO₄ particles were synthesized by the mechanochemical process and one-step heat treatment. Microscopic observations using SEM and TEM revealed that the carbon coating reduced the particle size of the LiFePO₄. The carbon-coated LiFePO₄ showed much better performances in terms of the discharge capacity and cycle stability than bare LiFePO₄. It was confirmed that the carbon coating decreased the migration distance of Li-ion and enhanced the charge transfer from CV and ac impedance measurements. The improved electrochemical properties of the carbon-coated LiFePO₄ were, therefore, attributed to the reduced particle size and enhanced electrical contacts by carbon.

Original language	English
Pages (from-to)	1383-1388
Number of pages	6
Journal	Journal of Power Sources
Volume	159
Issue number	2
DOIs	https://doi.org/10.1016/j.jpowsour.2005.12.043
Publication status	Published - 2006 Sept 22

Keywords

Carbon coating
Lithium iron phosphate
Lithium-ion batteries
ac impedance

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2005.12.043

Cite this

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title = "Electrochemical properties of the carbon-coated LiFePO4 as a cathode material for lithium-ion secondary batteries",

abstract = "In this study the effect of the carbon coating on the electrochemical properties of LiFePO4 as a cathode for Li-ion batteries were investigated. The carbon-coated LiFePO4 particles were synthesized by the mechanochemical process and one-step heat treatment. Microscopic observations using SEM and TEM revealed that the carbon coating reduced the particle size of the LiFePO4. The carbon-coated LiFePO4 showed much better performances in terms of the discharge capacity and cycle stability than bare LiFePO4. It was confirmed that the carbon coating decreased the migration distance of Li-ion and enhanced the charge transfer from CV and ac impedance measurements. The improved electrochemical properties of the carbon-coated LiFePO4 were, therefore, attributed to the reduced particle size and enhanced electrical contacts by carbon.",

keywords = "Carbon coating, Lithium iron phosphate, Lithium-ion batteries, ac impedance",

author = "Shin, {Ho Chul} and Cho, {Won Il} and Ho Jang",

note = "Funding Information: This work was supported by the Core Technology Development Program of the Ministry of Commerce, Industry and Energy (MOCIE).",

year = "2006",

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T1 - Electrochemical properties of the carbon-coated LiFePO4 as a cathode material for lithium-ion secondary batteries

AU - Shin, Ho Chul

AU - Cho, Won Il

AU - Jang, Ho

N1 - Funding Information: This work was supported by the Core Technology Development Program of the Ministry of Commerce, Industry and Energy (MOCIE).

PY - 2006/9/22

Y1 - 2006/9/22

N2 - In this study the effect of the carbon coating on the electrochemical properties of LiFePO4 as a cathode for Li-ion batteries were investigated. The carbon-coated LiFePO4 particles were synthesized by the mechanochemical process and one-step heat treatment. Microscopic observations using SEM and TEM revealed that the carbon coating reduced the particle size of the LiFePO4. The carbon-coated LiFePO4 showed much better performances in terms of the discharge capacity and cycle stability than bare LiFePO4. It was confirmed that the carbon coating decreased the migration distance of Li-ion and enhanced the charge transfer from CV and ac impedance measurements. The improved electrochemical properties of the carbon-coated LiFePO4 were, therefore, attributed to the reduced particle size and enhanced electrical contacts by carbon.

AB - In this study the effect of the carbon coating on the electrochemical properties of LiFePO4 as a cathode for Li-ion batteries were investigated. The carbon-coated LiFePO4 particles were synthesized by the mechanochemical process and one-step heat treatment. Microscopic observations using SEM and TEM revealed that the carbon coating reduced the particle size of the LiFePO4. The carbon-coated LiFePO4 showed much better performances in terms of the discharge capacity and cycle stability than bare LiFePO4. It was confirmed that the carbon coating decreased the migration distance of Li-ion and enhanced the charge transfer from CV and ac impedance measurements. The improved electrochemical properties of the carbon-coated LiFePO4 were, therefore, attributed to the reduced particle size and enhanced electrical contacts by carbon.

KW - Carbon coating

KW - Lithium iron phosphate

KW - Lithium-ion batteries

KW - ac impedance

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