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

化學工程與材料工程學系

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

13 引文斯高帕斯（Scopus）

摘要

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.

原文	???core.languages.en_GB???
頁（從 - 到）	70-73
頁數	4
期刊	Electrochemistry Communications
卷	61
DOIs	https://doi.org/10.1016/j.elecom.2015.10.008
出版狀態	已出版 - 1 12月 2015

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10.1016/j.elecom.2015.10.008

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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

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