A new electrolyte for LiFePO4 Li-ion batteries working in a low temperature range

Chunwei Yang; Feng Wu; Borong Wu

A new electrolyte for LiFePO₄ Li-ion batteries working in a low temperature range

Chunwei Yang, Feng Wu, Borong Wu^*

^*Corresponding author for this work

School of Material Science and Engineering

Beijing Institute of Technology

Research output: Contribution to conference › Paper › peer-review

Abstract

A solvent FEC (Fluoroethylene carbonate) was used to formulate an electrolyte for the operation of a LiFePO₄ cathode by employing a salt of 1M LiPF₆ (Lithium hexafluorophos- phate). The analysis of ion conductivity and CV indicated that the electrolyte with FEC has higher conductivity at low temperature, the solvent FEC start to form solid electrolyte interface (SEI) at 1.6V, so that cell stability is enhanced as that SEI can prevent co-embed of the solvent PC. The results determined by infrared spectrometry showed that the solvent FEC can prevent some solvent's reduction, and form a better SEI on the surface of MCMB. Besides, that SEI has a small resistance at room temperature and low temperature. Their electrochemical performances show that the Li-ion battery containing the electrolyte with FEC has a higher discharge capacity at low temperature.

Original language	English
Publication status	Published - 2010
Event	25th World Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exhibition: Sustainable Mobility Revolution, EVS 2010 - Shenzhen, China Duration: 5 Nov 2010 → 9 Nov 2010

Conference

Conference	25th World Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exhibition: Sustainable Mobility Revolution, EVS 2010
Country/Territory	China
City	Shenzhen
Period	5/11/10 → 9/11/10

Keywords

FEC
Ionic conductivity
Li-ion battery
Low temperature

Cite this

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title = "A new electrolyte for LiFePO4 Li-ion batteries working in a low temperature range",

abstract = "A solvent FEC (Fluoroethylene carbonate) was used to formulate an electrolyte for the operation of a LiFePO4 cathode by employing a salt of 1M LiPF6 (Lithium hexafluorophos- phate). The analysis of ion conductivity and CV indicated that the electrolyte with FEC has higher conductivity at low temperature, the solvent FEC start to form solid electrolyte interface (SEI) at 1.6V, so that cell stability is enhanced as that SEI can prevent co-embed of the solvent PC. The results determined by infrared spectrometry showed that the solvent FEC can prevent some solvent's reduction, and form a better SEI on the surface of MCMB. Besides, that SEI has a small resistance at room temperature and low temperature. Their electrochemical performances show that the Li-ion battery containing the electrolyte with FEC has a higher discharge capacity at low temperature.",

keywords = "FEC, Ionic conductivity, Li-ion battery, Low temperature",

author = "Chunwei Yang and Feng Wu and Borong Wu",

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TY - CONF

T1 - A new electrolyte for LiFePO4 Li-ion batteries working in a low temperature range

AU - Yang, Chunwei

AU - Wu, Feng

AU - Wu, Borong

PY - 2010

Y1 - 2010

N2 - A solvent FEC (Fluoroethylene carbonate) was used to formulate an electrolyte for the operation of a LiFePO4 cathode by employing a salt of 1M LiPF6 (Lithium hexafluorophos- phate). The analysis of ion conductivity and CV indicated that the electrolyte with FEC has higher conductivity at low temperature, the solvent FEC start to form solid electrolyte interface (SEI) at 1.6V, so that cell stability is enhanced as that SEI can prevent co-embed of the solvent PC. The results determined by infrared spectrometry showed that the solvent FEC can prevent some solvent's reduction, and form a better SEI on the surface of MCMB. Besides, that SEI has a small resistance at room temperature and low temperature. Their electrochemical performances show that the Li-ion battery containing the electrolyte with FEC has a higher discharge capacity at low temperature.

AB - A solvent FEC (Fluoroethylene carbonate) was used to formulate an electrolyte for the operation of a LiFePO4 cathode by employing a salt of 1M LiPF6 (Lithium hexafluorophos- phate). The analysis of ion conductivity and CV indicated that the electrolyte with FEC has higher conductivity at low temperature, the solvent FEC start to form solid electrolyte interface (SEI) at 1.6V, so that cell stability is enhanced as that SEI can prevent co-embed of the solvent PC. The results determined by infrared spectrometry showed that the solvent FEC can prevent some solvent's reduction, and form a better SEI on the surface of MCMB. Besides, that SEI has a small resistance at room temperature and low temperature. Their electrochemical performances show that the Li-ion battery containing the electrolyte with FEC has a higher discharge capacity at low temperature.

KW - FEC

KW - Ionic conductivity

KW - Li-ion battery

KW - Low temperature

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M3 - Paper

AN - SCOPUS:85081821002

T2 - 25th World Battery, Hybrid and Fuel Cell Electric Vehicle Symposium and Exhibition: Sustainable Mobility Revolution, EVS 2010

Y2 - 5 November 2010 through 9 November 2010

ER -

A new electrolyte for LiFePO₄ Li-ion batteries working in a low temperature range

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