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Enhanced Electrochemical Properties of LiFePO4 Electrodes with Carboxylated Poly(vinyl difluoride) in Lithium-Ion Batteries: Experimental and Theoretical Analysis

Title
Enhanced Electrochemical Properties of LiFePO4 Electrodes with Carboxylated Poly(vinyl difluoride) in Lithium-Ion Batteries: Experimental and Theoretical Analysis
Author
백운규
Keywords
Adhesion strengths; Current collector; Cyclability; Electric bikes; Electrochemical experiments; High-power source; Internal resistance; LiFePO; Lithium-ion battery; Metropolis Monte Carlo; Poly(vinyl difluoride); Polymer binders; Power tools; Rate capabilities; Theoretical simulation; Weight fractions
Issue Date
2011-07
Publisher
AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Citation
JOURNAL OF PHYSICAL CHEMISTRY C; AUG 18 2011, 115 32, p16242-p16246, 5p.
Abstract
The adhesion strengths between LiFePO4 cathodes and aluminum (Al) current collectors as well as the corresponding electrochemical properties of electrodes with carboxylated poly(vinyl difluoride) (C-PVdF) were experimentally and theoretically investigated. The adhesion strength of LiFePO4 cathodes with C-PVdF on Al current collectors were increased, compared with that of as received PVdF, resulting in the reduction of the internal resistance of the electrode. These results were supported by theoretical simulations based on the Metropolis Monte Carlo method. Electrochemical experiments indicated that the cyclability and rate capabilities of the cathode were improved as the weight fraction of C-PVdF in the electrode increased up to 70% of the polymer binders. In addition, 18 650-sized full cells employing the electrodes with C-PVdF showed promising performance in terms of rate capability as well as long-term cyclability, which suggests that this strategy can be beneficial for the realization of high power sources such as electric Vehicle's, electric bikes, and various power tools.
URI
http://dx.doi.org/10.1021/jp205233hhttp://hdl.handle.net/20.500.11754/41001
ISSN
1932-7447
DOI
10.1021/jp205233h
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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