Electrochemical properties of the solid polymer electrolyte PEO(20)-LiSO(3)CF(3)-Urea(1.5)
Zhang, Ding1; Yan, Hui1; Zhang, Huan; Zhu, Zhi1,2; Qilu1
Source PublicationSOLID STATE IONICS
AbstractIn this work, a new type of solid polymer electrolyte, formulated as PEO(20)-LiSO(3)CF(3)-Urea(x), is prepared by solution-casting technique. Among the different urea-containing samples, PEO(20)-LiTf-Urea(1.5) presents an optimum ambient temperature ionic conductivity of 5.1 x 10(-6) S/cm, enhanced by nearly 100 times over the PEO(20)-LiTf system. The mechanism for the increase in conductivity is discussed by the joint analysis of DSC and ATR-IR measurements. Urea molecules coordinate with lithium ions via carbonyl groups, which efficiently decrease the concentration of triple cations [Li(2)Tf](+). The addition of urea results in augmented cation transference and increased interface impedance. Analysis of the salt diffusion coefficient confirms that urea enhances the transport of lithium salts. The prepared SPE is tested by galvanostatic charge-discharge cycling in lithium secondary cells. Data obtained for PEO(20)-USO(3)CF(3)-Urea(1.5) reveals that the upper voltage limit in the LiCoO(2)-based cells should be about 4.0 V versus Li/Li(+). (C) 2011 Published by Elsevier B.V.
KeywordSolid Polymer Electrolyte Urea Polymer Ethylene Oxide Solution-casting Technique
Indexed BySCI
WOS IDWOS:000297432300006
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Document Type期刊论文
Corresponding AuthorQilu
Affiliation1.Peking Univ, Beijing Natl Lab Mol Sci, Inst Appl Chem, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
2.CITIC GUOAN MGL Co, Beijing 102200, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Ding,Yan, Hui,Zhang, Huan,et al. Electrochemical properties of the solid polymer electrolyte PEO(20)-LiSO(3)CF(3)-Urea(1.5)[J]. SOLID STATE IONICS,2011,199:32-36.
APA Zhang, Ding,Yan, Hui,Zhang, Huan,Zhu, Zhi,&Qilu.(2011).Electrochemical properties of the solid polymer electrolyte PEO(20)-LiSO(3)CF(3)-Urea(1.5).SOLID STATE IONICS,199,32-36.
MLA Zhang, Ding,et al."Electrochemical properties of the solid polymer electrolyte PEO(20)-LiSO(3)CF(3)-Urea(1.5)".SOLID STATE IONICS 199(2011):32-36.
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