尿素作为造孔剂对聚乙烯支撑的PAMS聚合物电解质性能的改进

doi:10.3866/PKU.WHXB20110712

Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (07): 1689-1694.doi: 10.3866/PKU.WHXB20110712

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles Next Articles

Performance Improvement of Polyethylene-Supported PAMS Electrolyte Using Urea as Foaming Agent

CHEN Lang¹, RAO Mu-Min¹, LI Wei-Shan^1,2,3, XU Meng-Qing^1,2,3, LIAO You-Hao¹, TAN Chun-Lin^1,2,3, YI Jin¹

1. School of Chemistry and Environment, South China Normal University, Guangzhou 510006, P. R. China;
2. Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation of Guangdong Higher Education Institutes, South China Normal University, Guangzhou 510006, P. R. China;
3. Engineering Research Center of Materials and Technology for Electrochemical Energy Storage (MOE), South China Normal University, Guangzhou 510006, P. R. China

Received:2011-01-18 Revised:2011-05-03 Published:2011-06-28
Contact: LI Wei-Shan E-mail:liwsh@scnu.edu.cn
Supported by:
The project was supported by the National Natural Science Foundation of China (20873046) and Natural Science Foundation of Guangdong Province, China (10351063101000001).

Abstract

Abstract:

Poly(acrylonitrile-methyl methacrylate-styrene) (PAMS) was synthesized by emulsion polymerization and a polyethylene (PE)-supported membrane was prepared using urea as foaming agent (PE-PAMS-U). The structure and performance of the PAMS copolymer, PE-PAMS-U membrane and corresponding gel polymer electrolyte (GPE) were characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetry (TG), linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS) and by a charge/discharge test. We found that the performance of the PE-PAMS-U based GPE could be improved when using urea as a foaming agent. With the use of urea the pore size of the membrane becomes uniform, the ionic conductivity of the GPE improves from 1.1×10^-3 to 2.15×10^-3 S·cm^-1 at room temperature and the interfacial resistance between the GPE and lithium is reduced from 480 to 250 Ω·cm². The GPE is stable up to 5.0 V (vs Li/Li⁺) at room temperature and the battery made using the Li/PE-supported GPE/LiCoO₂ shows a good rate and good cycle performance.

Key words: Lithium ion battery, Gel polymer electrolyte, Poly((acrylonitrile-methyl methacrylate-styrene), Urea, Foaming agent

CHEN Lang, RAO Mu-Min, LI Wei-Shan, XU Meng-Qing, LIAO You-Hao, TAN Chun-Lin, YI Jin. Performance Improvement of Polyethylene-Supported PAMS Electrolyte Using Urea as Foaming Agent[J]. Acta Phys. -Chim. Sin. 2011, 27(07), 1689-1694. doi: 10.3866/PKU.WHXB20110712

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Performance Improvement of Polyethylene-Supported PAMS Electrolyte Using Urea as Foaming Agent

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