Electrochemical performance and kinetics of lifepo4/C cathode in a low-temperature electrolyte

Jingwen Yao; Feng Wu; Borong Wu; Xinping Qiu; Chunwei Yang; Ning Li

doi:10.3390/wevj4020396

Electrochemical performance and kinetics of lifepo4/C cathode in a low-temperature electrolyte

Jingwen Yao, Feng Wu^*, Borong Wu, Xinping Qiu, Chunwei Yang, Ning Li

^*此作品的通讯作者

材料学院

科研成果: 期刊稿件 › 文章 › 同行评审

摘要

The electrochemical performance of LiFePO4/C cathode in a carbonate-based electrolyte (1.0M LiPF6 / EC-DMC-PC-FEC) was tested in coin type cells at low temperatures. The discharge capacities of the LiFePO4/C cathode were about 161.6mAh/g (20^oC), 141.4mAh/g (-10^oC) and 112.9mAh/g (-20^oC) at 0.1C charge-discharge rate. The electrode kinetics of LiFePO4/C cathode was determined at different temperatures using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The analyses demonstrate that the sluggish of charge-transfer reaction on the LiFePO4/C-electrolyte interface and the dramatic decrease in lithium ion diffusivity in the bulk LiFePO4/C material were the key performance limiting factors at low temperature.

源语言	英语
页（从-至）	396-399
页数	4
期刊	World Electric Vehicle Journal
卷	4
期	1
DOI	https://doi.org/10.3390/wevj4020396
出版状态	已出版 - 2011

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title = "Electrochemical performance and kinetics of lifepo4/C cathode in a low-temperature electrolyte",

abstract = "The electrochemical performance of LiFePO4/C cathode in a carbonate-based electrolyte (1.0M LiPF6 / EC-DMC-PC-FEC) was tested in coin type cells at low temperatures. The discharge capacities of the LiFePO4/C cathode were about 161.6mAh/g (20oC), 141.4mAh/g (-10oC) and 112.9mAh/g (-20oC) at 0.1C charge-discharge rate. The electrode kinetics of LiFePO4/C cathode was determined at different temperatures using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The analyses demonstrate that the sluggish of charge-transfer reaction on the LiFePO4/C-electrolyte interface and the dramatic decrease in lithium ion diffusivity in the bulk LiFePO4/C material were the key performance limiting factors at low temperature.",

keywords = "Fluoroethylene carbonate, Lithium ion batteries, Low-temperature electrolyte",

author = "Jingwen Yao and Feng Wu and Borong Wu and Xinping Qiu and Chunwei Yang and Ning Li",

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T1 - Electrochemical performance and kinetics of lifepo4/C cathode in a low-temperature electrolyte

AU - Yao, Jingwen

AU - Wu, Feng

AU - Wu, Borong

AU - Qiu, Xinping

AU - Yang, Chunwei

AU - Li, Ning

PY - 2011

Y1 - 2011

N2 - The electrochemical performance of LiFePO4/C cathode in a carbonate-based electrolyte (1.0M LiPF6 / EC-DMC-PC-FEC) was tested in coin type cells at low temperatures. The discharge capacities of the LiFePO4/C cathode were about 161.6mAh/g (20oC), 141.4mAh/g (-10oC) and 112.9mAh/g (-20oC) at 0.1C charge-discharge rate. The electrode kinetics of LiFePO4/C cathode was determined at different temperatures using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The analyses demonstrate that the sluggish of charge-transfer reaction on the LiFePO4/C-electrolyte interface and the dramatic decrease in lithium ion diffusivity in the bulk LiFePO4/C material were the key performance limiting factors at low temperature.

AB - The electrochemical performance of LiFePO4/C cathode in a carbonate-based electrolyte (1.0M LiPF6 / EC-DMC-PC-FEC) was tested in coin type cells at low temperatures. The discharge capacities of the LiFePO4/C cathode were about 161.6mAh/g (20oC), 141.4mAh/g (-10oC) and 112.9mAh/g (-20oC) at 0.1C charge-discharge rate. The electrode kinetics of LiFePO4/C cathode was determined at different temperatures using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The analyses demonstrate that the sluggish of charge-transfer reaction on the LiFePO4/C-electrolyte interface and the dramatic decrease in lithium ion diffusivity in the bulk LiFePO4/C material were the key performance limiting factors at low temperature.

KW - Fluoroethylene carbonate

KW - Lithium ion batteries

KW - Low-temperature electrolyte

UR - http://www.scopus.com/inward/record.url?scp=84867955032&partnerID=8YFLogxK

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DO - 10.3390/wevj4020396

M3 - Article

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SN - 2032-6653

VL - 4

SP - 396

EP - 399

JO - World Electric Vehicle Journal

JF - World Electric Vehicle Journal

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Electrochemical performance and kinetics of lifepo4/C cathode in a low-temperature electrolyte

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