期刊
APPLIED SURFACE SCIENCE
卷 282, 期 -, 页码 444-449出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2013.05.149
关键词
Lithium iron phosphate; Polymer binder; Poly(acrylic acid); Poly(methyl methacrylate)
类别
资金
- Brain Korea 21 plus
Impacts of different polymer binders (PVdF, PAA and PMMA) on electrochemical performance of the LiFePO4 cathode in Li-ion batteries are investigated. From CV result, the voltage between redox peaks of the LiFePO4 with PVdF, PAA and PMMA binders are 0.26, 0.20 and 0.23 V, respectively. The current of the LiFePO4 with PMMA binder shows the highest value of 1.4 mA. The apparent diffusion coefficient of the LiFePO4 with PVdF, PAA and PMMA binders is 8.30 x 10(-12), 2.57 x 10(-11) and 9.13 x 10(-11) cm(2) s(-1), respectively. The discharge capacities of the LiFePO4 with PVdF, PAA and PMMA binders are 106, 143 and 154 mAh g(-1) at an initial cycle, respectively. FE-SEM studies clearly demonstrate that plate-like PAA and PMMA coating on the electrodes form a protective film, which may decrease the amount of the deposits, thus decreasing crack and crystallization on the electrode surface. Achieved results indicate that PVdF, PAA and PMMA binders show better properties than the traditional one, especially PMMA one. (C) 2013 Elsevier B. V. All rights reserved.
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