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World Electric Vehicle Journal is published by MDPI from Volume 9 issue 1 (2018). Articles in this Issue were published by The World Electric Vehicle Association (WEVA) and its member the European Association for e-Mobility (AVERE), the Electric Drive Transportation Association (EDTA), and the Electric Vehicle Association of Asia Pacific (EVAAP). They are hosted by MDPI on mdpi.com as a courtesy and upon agreement with AVERE.
Open AccessArticle

Electrochemical performance and kinetics of LiFePO4/C cathode in a low-temperature electrolyte

1,3, 2,3,*, 2,3, 1, 2,3 and 2,3
1
Department of Chemistry, Tsinghua University, Beijing 100084, China
2
School of Chemical Engineering & the Environment, Beijing Institute of Technology, Beijing 100081, China
3
National Development Center of High Technology Green Materials, Beijing 100081, China
*
Author to whom correspondence should be addressed.
World Electr. Veh. J. 2010, 4(2), 396-399; https://doi.org/10.3390/wevj4020396
Published: 25 June 2010
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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 (20℃), 141.4mAh/g (-10℃) and 112.9mAh/g (-20℃) 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: LiFePO4/C cathode; Lithium ion batteries; Low-temperature electrolyte; Fluoroethylene carbonate LiFePO4/C cathode; Lithium ion batteries; Low-temperature electrolyte; Fluoroethylene carbonate
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Yao, J.; Wu, F.; Wu, B.; Qiu, X.; Yang, C.; Li, N. Electrochemical performance and kinetics of LiFePO4/C cathode in a low-temperature electrolyte. World Electr. Veh. J. 2010, 4, 396-399.

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