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Preparation and Characterization of an Alkaline Poly(vinyl alcohol) Electrolyte with High Ambient Conductivity
Li Zhiying,Liu Yang,Liu Hongtao,He Ping,Li Jinghong*
Author NameAffiliationE-mail
Li Zhiying State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022  
Liu Yang State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022  
Liu Hongtao State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022  
He Ping State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022  
Li Jinghong* State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 lijingh@ciac.jl.cn 
Abstract:
A type of polymer-in-salt electrolyte composed of poly( vinyl alcohol), KOH and water was prepared by a solution casting method. X-ray diffraction proves that the high concentration of KOH in the electrolyte is in an amorphous state. The ionic conductivities of the PVA-KOH-H2O electrolytes increased as the concentration of KOH increased, and the alkaline electrolyte with PVA/KOH 1/3 (mass ratio) exhibited the highest ionic conductivity of 0. 15 S/cm at room temperature, as measured by electrochemical impedance spectroscopy. The temperature dependence of the conductivity is found to be in agreement with the Arrhenius equation. The potential stability window at the metal/electrolyte interface was of 1.4 V for the nickel electrode determined by cyclic voltammetry.
Key words:  Polymer-in-salt, Alkaline polymer electrolyte, Poly( vinyl alcohol), Ionic conductivity
FundProject:
一种高电导率PVA聚合物电解质的制备与表征
李志英,刘洋,刘洪涛,何平,李景虹*
摘要:
通过溶液浇注法制备了一种polymer-in-salt型PVA-KOH-H2O聚合物电解质.对该电解质进行了X射线衍射、热性质及电化学性质测试与分析.X射线衍射显示PVA和KOH在聚合物电解质中均以非晶态存在.随着KOH含量的增加,聚合物的玻璃转化点温度逐渐上升,而电解质电导率也随之增加.该电解质的电化学窗口可达1.4 V,阻抗测试显示当电解质组成PVA/KOH为1/3(质量比)时,室温电导率可达0.15 S/cm,电导率与温度关系符合Arrhenius方程.该电解质热力学稳定性好,机械强度高、电化学性质
关键词:  碱性聚合物电解质  聚乙烯醇  离子电导率
DOI:10.1088/1674-0068/18/4/625-630
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