An approach of evaluating the effect of vinylene carbonate additive on graphite anode for lithium ion battery at elevated temperature

Yi Hung Liu; Sahori Takeda; Ikue Kaneko; Hideya Yoshitake; Masahiro Yanagida; Yuria Saito; Tetsuo Sakai

doi:10.1016/j.elecom.2015.10.008

An approach of evaluating the effect of vinylene carbonate additive on graphite anode for lithium ion battery at elevated temperature

Yi Hung Liu, Sahori Takeda, Ikue Kaneko, Hideya Yoshitake, Masahiro Yanagida, Yuria Saito, Tetsuo Sakai

Department of Chemical and Materials Engineering

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

13 Scopus citations

Abstract

An approach is proposed to evaluate the VC effect in a LiFePO₄/graphite cell at 60 °C through liquid chromatography mass spectrometry (LC-MS) together with direct analysis in real time mass spectrometry (DART-MS). The LC-MS result shows that VC can effectively suppress the formation of phosphate esters as well as carbonate oligomers during the electrochemical cycling. It is also known from DART-MS analysis that VC assists the formation of thermally resistant oligomeric phosphate ester layer on the graphite surface, storing more solvent EC inside the layer. On the other hand, no compounds are observed on the LiFePO₄ cathode surface. The formation of the denser oligomeric phosphate ester layer is found to be the reason for the improved cycle stability of the cell cycled at elevated temperature.

Original language	English
Pages (from-to)	70-73
Number of pages	4
Journal	Electrochemistry Communications
Volume	61
DOIs	https://doi.org/10.1016/j.elecom.2015.10.008
State	Published - 1 Dec 2015

Keywords

DART-MS
Elevated temperature
Graphite
Lithium ion battery
Vinylene carbonate

UN SDGs

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

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10.1016/j.elecom.2015.10.008

Cite this

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title = "An approach of evaluating the effect of vinylene carbonate additive on graphite anode for lithium ion battery at elevated temperature",

abstract = "An approach is proposed to evaluate the VC effect in a LiFePO4/graphite cell at 60 °C through liquid chromatography mass spectrometry (LC-MS) together with direct analysis in real time mass spectrometry (DART-MS). The LC-MS result shows that VC can effectively suppress the formation of phosphate esters as well as carbonate oligomers during the electrochemical cycling. It is also known from DART-MS analysis that VC assists the formation of thermally resistant oligomeric phosphate ester layer on the graphite surface, storing more solvent EC inside the layer. On the other hand, no compounds are observed on the LiFePO4 cathode surface. The formation of the denser oligomeric phosphate ester layer is found to be the reason for the improved cycle stability of the cell cycled at elevated temperature.",

keywords = "DART-MS, Elevated temperature, Graphite, Lithium ion battery, Vinylene carbonate",

author = "Liu, {Yi Hung} and Sahori Takeda and Ikue Kaneko and Hideya Yoshitake and Masahiro Yanagida and Yuria Saito and Tetsuo Sakai",

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T1 - An approach of evaluating the effect of vinylene carbonate additive on graphite anode for lithium ion battery at elevated temperature

AU - Liu, Yi Hung

AU - Takeda, Sahori

AU - Kaneko, Ikue

AU - Yoshitake, Hideya

AU - Yanagida, Masahiro

AU - Saito, Yuria

AU - Sakai, Tetsuo

PY - 2015/12/1

Y1 - 2015/12/1

N2 - An approach is proposed to evaluate the VC effect in a LiFePO4/graphite cell at 60 °C through liquid chromatography mass spectrometry (LC-MS) together with direct analysis in real time mass spectrometry (DART-MS). The LC-MS result shows that VC can effectively suppress the formation of phosphate esters as well as carbonate oligomers during the electrochemical cycling. It is also known from DART-MS analysis that VC assists the formation of thermally resistant oligomeric phosphate ester layer on the graphite surface, storing more solvent EC inside the layer. On the other hand, no compounds are observed on the LiFePO4 cathode surface. The formation of the denser oligomeric phosphate ester layer is found to be the reason for the improved cycle stability of the cell cycled at elevated temperature.

AB - An approach is proposed to evaluate the VC effect in a LiFePO4/graphite cell at 60 °C through liquid chromatography mass spectrometry (LC-MS) together with direct analysis in real time mass spectrometry (DART-MS). The LC-MS result shows that VC can effectively suppress the formation of phosphate esters as well as carbonate oligomers during the electrochemical cycling. It is also known from DART-MS analysis that VC assists the formation of thermally resistant oligomeric phosphate ester layer on the graphite surface, storing more solvent EC inside the layer. On the other hand, no compounds are observed on the LiFePO4 cathode surface. The formation of the denser oligomeric phosphate ester layer is found to be the reason for the improved cycle stability of the cell cycled at elevated temperature.

KW - DART-MS

KW - Elevated temperature

KW - Graphite

KW - Lithium ion battery

KW - Vinylene carbonate

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EP - 73

JO - Electrochemistry Communications

JF - Electrochemistry Communications

ER -

An approach of evaluating the effect of vinylene carbonate additive on graphite anode for lithium ion battery at elevated temperature

Abstract

Keywords

UN SDGs

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